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- Multiple ChoicePlease save your changes before editing any questions.
LiBr is called
lithium bromine
lithium (I) bromine
lithium bromide
lithuim (I) bromide
- Multiple ChoicePlease save your changes before editing any questions.
Which of these combinations is an ionic compound?
Metal and Metal
Nonmetal and Nonmetal
Metal and Nonmetal
Cation and Cation
- Multiple ChoicePlease save your changes before editing any questions.What is the name of N2O3Nitrogen trioxideDinitrogen oxideDinitrogen trioxideNitrogen oxide
- Multiple ChoicePlease save your changes before editing any questions.What is the chemical formula for Tetrasulfur pentoxide?SOS4OS4O5S5O4
- Multiple ChoicePlease save your changes before editing any questions.
A(an) __________ bond exists between two nonmetals.
ionic
covalent
- Multiple ChoicePlease save your changes before editing any questions.
What is a valence electron?
an electron that is found in the outermost shell of an atom.
an electron found in the innermost shell of an atom.
an electron found in the middle shell.
- Multiple ChoicePlease save your changes before editing any questions.
What type of reaction involves 2 substances combining to form 1 new compound?
Decomposition Reaction
Single Displacement Reaction
Double Displacement Reaction
Synthesis Reaction
- Multiple ChoicePlease save your changes before editing any questions.
What are the reactants in the chemical equation pictured?
CH4 and CO2
CH4 and O2
CO2 and H2O
O2 and H2O
- Multiple ChoicePlease save your changes before editing any questions.
What are the products of the chemical reaction pictured?
CH4 and CO2
CH4 and O2
CO2 and H2O
O2 and H2O
- Multiple ChoicePlease save your changes before editing any questions.
2Na +S → Na2S
Double Replacement
Decomposition
Combustion
Synthesis
- Multiple ChoicePlease save your changes before editing any questions.What is a coefficient?The small number on the right of the chemical symbol.The large number to the left of a formula.
- Multiple ChoicePlease save your changes before editing any questions.Balance this equation.
_Mg + _Cl2 --> _MgCl21, 2,1already balanced2,1,11,1,2 - Multiple ChoicePlease save your changes before editing any questions.Balance this equation
_Zn+_HCl-->_ZnCl2 +_H21,1,2,11,1,1,21,2,1,12,1,1,1 - Multiple ChoicePlease save your changes before editing any questions.What does the Law of Conservation of Mass state?Matter cannot be gained or lost in a chemical reaction.Matter can only be lost in a chemical reaction.Matter can only be gained in a chemical reaction.Matter can be gained and lost in a chemical reaction.
- Multiple ChoicePlease save your changes before editing any questions.Number of H in 3(NH₄)₂CrO₄46824
- Multiple ChoicePlease save your changes before editing any questions.What is the molar mass of table salt (NaCl)?116.886 g/mol35.453 g/mol22.990 g/mol58.443 g/mol
- Multiple ChoicePlease save your changes before editing any questions.
A baker needs 6 g of baking soda for a recipe. The chemical formula for baking soda is NaHCO3. How many moles of baking soda is needed?
0.071 mol
0.167 mol
0.273 mol
0.214 mol
- Multiple ChoicePlease save your changes before editing any questions.2Na + 2H2O → 2NaOH+ H2
How many grams of hydrogen are produced if 120 g of Na are available?5.2 g2.6 g690 g45 g - Multiple ChoicePlease save your changes before editing any questions.B2H6 + 3O2 -->2 HBO2 + 2 H2O
What mass of O2 will be needed to burn 36.1 g of B2H6?13.8 g O23.86 mol of O2124 g O2 - Multiple ChoicePlease save your changes before editing any questions.
How many valence electron does Beryllium have?
1
2
0
4
- Multiple ChoicePlease save your changes before editing any questions.
Which subatomic particle has NO CHARGE?
Protons
Neutrons
Electrons
Nucleus
- Multiple ChoicePlease save your changes before editing any questions.
Which subatomic particle has a POSITIVE charge?
Protons
Neutrons
Electrons
Nucleus
- Multiple ChoicePlease save your changes before editing any questions.
Which subatomic particle tells you the identity of the Element?
Protons
Neutrons
Electrons
Nucleus
- Multiple ChoicePlease save your changes before editing any questions.
Which Element has 21 protons?
Carbon
Zinc
Titanium
Scandium
- Multiple ChoicePlease save your changes before editing any questions.
If an element has 11 protons and 12 Neutrons, what is it's atomic mass?
12
11
23
1
- Multiple ChoicePlease save your changes before editing any questions.
A FULL OUTER SHELL has how many electrons? (Not including the first level)
8
7
4
10
- Multiple ChoicePlease save your changes before editing any questions.
What is the name for this group of elements?
Alkali
Halogens
Noble Gases
Alkali-Earth
- Multiple ChoicePlease save your changes before editing any questions.
In the formula 2C6H12O6, what is the Coefficient?
5
6
2
12
- Multiple ChoicePlease save your changes before editing any questions.
LiBr is called
lithium bromine
lithium (I) bromine
lithium bromide
lithuim (I) bromide
- Multiple ChoicePlease save your changes before editing any questions.
Which of these combinations is an ionic compound?
Metal and Metal
Nonmetal and Nonmetal
Metal and Nonmetal
Cation and Cation
- Multiple ChoicePlease save your changes before editing any questions.What is the name of N2O3Nitrogen trioxideDinitrogen oxideDinitrogen trioxideNitrogen oxide
- Multiple ChoicePlease save your changes before editing any questions.What is the chemical formula for Tetrasulfur pentoxide?SOS4OS4O5S5O4
- Multiple ChoicePlease save your changes before editing any questions.
A(an) __________ bond exists between two nonmetals.
ionic
covalent
- Multiple ChoicePlease save your changes before editing any questions.What is a positivly charge atom called?cationanion
- Multiple ChoicePlease save your changes before editing any questions.
What is a negatively charged atom called?
Anion
Cation
Ion
- Multiple ChoicePlease save your changes before editing any questions.
What is a valence electron?
an electron that is found in the outermost shell of an atom.
an electron found in the innermost shell of an atom.
an electron found in the middle shell.
- Multiple ChoicePlease save your changes before editing any questions.
What type of reaction involves 2 substances combining to form 1 new compound?
Decomposition Reaction
Single Displacement Reaction
Double Displacement Reaction
Synthesis Reaction
- Multiple ChoicePlease save your changes before editing any questions.
What are the reactants in the chemical equation pictured?
CH4 and CO2
CH4 and O2
CO2 and H2O
O2 and H2O
- Multiple ChoicePlease save your changes before editing any questions.
What are the products of the chemical reaction pictured?
CH4 and CO2
CH4 and O2
CO2 and H2O
O2 and H2O
- Multiple ChoicePlease save your changes before editing any questions.
2Na +S → Na2S
Double Replacement
Decomposition
Combustion
Synthesis
- Multiple ChoicePlease save your changes before editing any questions.What is a coefficient?The small number on the right of the chemical symbol.The large number to the left of a formula.
- Multiple ChoicePlease save your changes before editing any questions.Which problem is balanced?PbO2 + 2H2SO2 + H20 --> H2SO42Na + 2H2O --> 2NaOH + H2
- Multiple ChoicePlease save your changes before editing any questions.Balance this equation.
_Mg + _Cl2 --> _MgCl21, 2,1already balanced2,1,11,1,2 - Multiple ChoicePlease save your changes before editing any questions.Balance this equation
_Zn+_HCl-->_ZnCl2 +_H21,1,2,11,1,1,21,2,1,12,1,1,1 - Multiple ChoicePlease save your changes before editing any questions.What does the Law of Conservation of Mass state?Matter cannot be gained or lost in a chemical reaction.Matter can only be lost in a chemical reaction.Matter can only be gained in a chemical reaction.Matter can be gained and lost in a chemical reaction.
- Multiple ChoicePlease save your changes before editing any questions.Number of H in 3(NH₄)₂CrO₄46824
- Multiple ChoicePlease save your changes before editing any questions.What are the smaller numbers that you CANNOT change in a chemical equation?CoefficientProductsReactantsSubscript
- Multiple ChoicePlease save your changes before editing any questions.What is the molar mass of table salt (NaCl)?116.886 g/mol35.453 g/mol22.990 g/mol58.443 g/mol
- Multiple ChoicePlease save your changes before editing any questions.
Determine the number of moles of AlNO3 that are in 264 g of the compound.
2.97 mol
3.45 mol
2.73 mol
1.86 mol
- Multiple ChoicePlease save your changes before editing any questions.
A baker needs 6 g of baking soda for a recipe. The chemical formula for baking soda is NaHCO3. How many moles of baking soda is needed?
0.071 mol
0.167 mol
0.273 mol
0.214 mol
- Multiple ChoicePlease save your changes before editing any questions.2Na + 2H2O → 2NaOH+ H2
How many grams of hydrogen are produced if 120 g of Na are available?5.2 g2.6 g690 g45 g - Multiple ChoicePlease save your changes before editing any questions.B2H6 + 3O2 -->2 HBO2 + 2 H2O
What mass of O2 will be needed to burn 36.1 g of B2H6?13.8 g O23.86 mol of O2124 g O2 - Multiple ChoicePlease save your changes before editing any questions.
How many valence electron does Beryllium have?
1
2
0
4
- Multiple ChoicePlease save your changes before editing any questions.
Which subatomic particle has NO CHARGE?
Protons
Neutrons
Electrons
Nucleus
- Multiple ChoicePlease save your changes before editing any questions.
Which subatomic particle has a POSITIVE charge?
Protons
Neutrons
Electrons
Nucleus
- Multiple ChoicePlease save your changes before editing any questions.
Which subatomic particle has a NEGATIVE charge?
Protons
Neutrons
Electrons
Nucleus
- Multiple ChoicePlease save your changes before editing any questions.
Which subatomic particle tells you the identity of the Element?
Protons
Neutrons
Electrons
Nucleus
- Multiple ChoicePlease save your changes before editing any questions.
Which Element has 21 protons?
Carbon
Zinc
Titanium
Scandium
- Multiple ChoicePlease save your changes before editing any questions.
If an element has 11 protons and 12 Neutrons, what is it's atomic mass?
12
11
23
1
- Multiple ChoicePlease save your changes before editing any questions.
A FULL OUTER SHELL has how many electrons? (Not including the first level)
8
7
4
10
- Multiple ChoicePlease save your changes before editing any questions.
What is the name for this group of elements?
Alkali
Halogens
Noble Gases
Alkali-Earth
- Multiple ChoicePlease save your changes before editing any questions.
In the formula 2C6H12O6, what is the Coefficient?
5
6
2
12
- Multiple ChoicePlease save your changes before editing any questions.
What are isotopes?
different element with the same number of electrons
same element with a different number of electrons
same element with a different number of neutrons
different element with the same number of neutrons
- Multiple ChoicePlease save your changes before editing any questions.
What are the yellow elements in the following picture?
metals
nonmetals
metalloids
- Multiple ChoicePlease save your changes before editing any questions.
Anything that has mass and takes up space.
atom
colloid
compound
matter
- Multiple ChoicePlease save your changes before editing any questions.
Which element will have a higher electronegativity than Arsenic (As) ?
Carbon
Antimony
Germanium
Neon
- Multiple ChoicePlease save your changes before editing any questions.
You need 2 pieces of bread, 1 tablespoon of peanut butter and 2 tablespoons of jelly to make a sandwich. If you have 10 pieces of bread, 4 tablespoons of peanut butter and 20 tablespoons of jelly, what is the limiting reactant?
bread
jelly
peanut butter
sandwhich
- Multiple ChoicePlease save your changes before editing any questions.When is the law of conservation of matter true?all the timeunder some conditions, but not otherswhen energy is given offonly in February
- Multiple ChoicePlease save your changes before editing any questions.This could be the dot diagram ofMg, group 2.Cl, group 17.C, group 14.O, group 16.
- Multiple ChoicePlease save your changes before editing any questions.Signs that a chemical change has occurred includea change in colorthe release of bubblesthe production of an odorall of the above
- Multiple ChoicePlease save your changes before editing any questions.The density of water is.1 g/cubic cm10g/cubic cm1.0 g/cubic cm0 g/cubic cm
- Multiple ChoicePlease save your changes before editing any questions.In a liquid, the molecules have a definite shape and a definite volumeTrueFalse
- Multiple ChoicePlease save your changes before editing any questions.Mixing salt and waterChemical ChangePhysical Change
- Multiple ChoicePlease save your changes before editing any questions.What is the number of protons that the element in this image contain?1471518
- Multiple ChoicePlease save your changes before editing any questions.What is the atomic mass of "F"9181719
- Multiple ChoicePlease save your changes before editing any questions.the central region of an atom where its neutrons and protons are is itsnucleuselectron cloudcorecenter
- Multiple ChoicePlease save your changes before editing any questions.Something that is made up of only one kind of atom is known as _________________.a moleculea compoundan elementa proton
- Multiple ChoicePlease save your changes before editing any questions.Which is a chemical change?freezing fruit juiceslicing a potatoboiling watercopper metal turning green
- Multiple ChoicePlease save your changes before editing any questions.This is an ionic bond with electrons sharedThis is an ionic bond with electrons transferredThis is a covalent bond with electrons sharedThis is a covalent bond with electrons transferred
- Multiple ChoicePlease save your changes before editing any questions.What is the density of an object having a mass of 8.0 g and a volume of 25 cm3?0.32 g/cm33.1 g/cm3200 g/cm32.0 g/cm3
- Multiple ChoicePlease save your changes before editing any questions.
The picture shows a piece of paper being cut in half with scissors. Which of the following statements is true of this process?
It is a chemical change because the paper particles were broken and rearranged.
It is a chemical change because the substance was changed to something new.
It is a physical change because the substance remained the same.
It is a physical change because the paper only changed its state of matter.
- Multiple ChoicePlease save your changes before editing any questions.
What is the molecular geometry of this boron trifluoride (BF3)?
linear
bent
trigonal planar
tetrahedral
- Multiple ChoicePlease save your changes before editing any questions.
One mole is equal to the number of atoms in exactly 12 grams of carbon-12. The number (6.02 × 1023 particles per mole) is known as
Planck's constant.
Avogadro's number.
Coulomb's constant.
Faraday's number.
- Multiple ChoicePlease save your changes before editing any questions.What two types of measurements make up DENSITY?Mass and VolumeTemperature and MassGrams and CentimetersVolume and Weight
- Multiple ChoicePlease save your changes before editing any questions.Electronegativity is...how good an atom is at attracting electronsthe ability of an atom to lose electronsthe energy required to remove an electron from a specific atomhow easy it is to make friends.
- Multiple ChoicePlease save your changes before editing any questions.
What are the yellow elements in the following picture?
metals
nonmetals
metalloids
- Multiple ChoicePlease save your changes before editing any questions.
Which element will have a higher electronegativity than Arsenic (As) ?
Carbon
Antimony
Germanium
Neon
- Multiple ChoicePlease save your changes before editing any questions.When is the law of conservation of matter true?all the timeunder some conditions, but not otherswhen energy is given offonly in February
- Multiple ChoicePlease save your changes before editing any questions.This could be the dot diagram ofMg, group 2.Cl, group 17.C, group 14.O, group 16.
- Multiple ChoicePlease save your changes before editing any questions.Signs that a chemical change has occurred includea change in colorthe release of bubblesthe production of an odorall of the above
- Multiple ChoicePlease save your changes before editing any questions.What is the number of protons that the element in this image contain?1471518
- Multiple ChoicePlease save your changes before editing any questions.What is the atomic mass of "F"9181719
- Multiple ChoicePlease save your changes before editing any questions.Something that is made up of only one kind of atom is known as _________________.a moleculea compoundan elementa proton
- Multiple ChoicePlease save your changes before editing any questions.the central region of an atom where its neutrons and protons are is itsnucleuselectron cloudcorecenter
- Multiple ChoicePlease save your changes before editing any questions.This is an ionic bond with electrons sharedThis is an ionic bond with electrons transferredThis is a covalent bond with electrons sharedThis is a covalent bond with electrons transferred
- Multiple ChoicePlease save your changes before editing any questions.
One mole is equal to the number of atoms in exactly 12 grams of carbon-12. The number (6.02 × 1023 particles per mole) is known as
Planck's constant.
Avogadro's number.
Coulomb's constant.
Faraday's number.
- Multiple ChoicePlease save your changes before editing any questions.What two types of measurements make up DENSITY?Mass and VolumeTemperature and MassGrams and CentimetersVolume and Weight
- Multiple ChoicePlease save your changes before editing any questions.Electronegativity is...how good an atom is at attracting electronsthe ability of an atom to lose electronsthe energy required to remove an electron from a specific atomhow easy it is to make friends.
- Multiple ChoicePlease save your changes before editing any questions.
An atom's valence electrons are located where?
Innermost electron shell
Nucleus
Second electron shell
Outermost electron shell
- Multiple ChoicePlease save your changes before editing any questions.
The molar volume of a gas at STP occupies _____________.
22.4 L
0˚C
1 kiloPascal
12 grams
- Multiple ChoicePlease save your changes before editing any questions.
In a double replacement, ____________________
The reactants are usually a metal and a nonmetal
One of the reactants is often water
The reactants are generally 2 ionic compounds in aqueous solutions
Energy in the form of light or heat is often produced
- Multiple ChoicePlease save your changes before editing any questions.
Which of the following shows both the correct formula and correct name of an acid?
HClO2, chloric acid
HNO2, hydronitrous acid
H3PO4, phosphoric acid
HI, iodic acid
- Multiple ChoicePlease save your changes before editing any questions.
When an equation is used to calculate the amount of product that could form during a reaction, then the value obtained is called the ____.
Actual yield
Percent yield
Minimum yield
Theoretical yield
- Multiple ChoicePlease save your changes before editing any questions.
The equation 2C3H7OH + 9O2 → 6CO2 + 8H2O is an example of which type of reaction?
Combustion reaction
Single replacement reaction
Double replacement reaction
Decomposition reaction
- Multiple ChoicePlease save your changes before editing any questions.The group number tells us how many _________ there are in an element.groupsvalence electronsenergy levelschemicals
- Multiple ChoicePlease save your changes before editing any questions.The ________________ tells you how many energy levels are used in an element.group numberatomprotonsperiod number
- Multiple ChoicePlease save your changes before editing any questions.Which particle does not contribute mass to the atom?ProtonNeutronElectronNucleus
- Multiple ChoicePlease save your changes before editing any questions.
Identify the following compound as ionic or covalent: SO2
ionic
covalent
- Multiple ChoicePlease save your changes before editing any questions.
Why do atoms bond?
They typically don't bond
To add or take away energy levels
To have a full valence shell.
To have a full inner shell
- Multiple ChoicePlease save your changes before editing any questions.
What charge would a potassium (K) ion have?
+1
-1
+2
-2
- Multiple ChoicePlease save your changes before editing any questions.If an atom loses two electrons what charge will it have?+ 2- 2+1-1
- Multiple ChoicePlease save your changes before editing any questions.What atom matches this electron configuration?
1s22s22p63s23p64s23d10ZincCopperNickelGermanium - Multiple ChoicePlease save your changes before editing any questions.
What is the electron configuration of Iodine?
[Kr]5s24d105p6
[Kr]5s24d106p6
[Kr]5s25d106p6
None of the above
- Multiple ChoicePlease save your changes before editing any questions.The electron configuration of an atom is 1s22s22p6. The number of electrons in the atom is36810
- Multiple ChoicePlease save your changes before editing any questions.A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?Mg4N3MgN2Mg3N2MgN
- Multiple ChoicePlease save your changes before editing any questions.
How many molecules are in 2.5 mol of NaCl?
1.5 x 1024 molecules
1.5 molecules
4.15 molecules
1.5 x 1023 molecules
- Multiple ChoicePlease save your changes before editing any questions.Which pair has the same empirical formula?NaCrO4 and Na2Cr2O7C2H4O2 and C6H12O6C3H6O3 and C2H6O2CH4 and C2H6
- Multiple ChoicePlease save your changes before editing any questions.In order for an atom to be neutral what has to be true?The atom has more protons than neutronsThe atom has more neutrons than protonsThe atom has the same number of protons and neutronsThe atom has the same number of protons and electrons
- Multiple ChoicePlease save your changes before editing any questions.This model this model was the first to show a nucleus, consisting of protons and neutron. Electrons surround the nucleus but are not shown in distinct energy levels.The "Rutherford Model" of the atomThe "Plum Pudding Model" of the atomThe "Quantum Mechanical Modell" of the atomDemocritus's model of the atom
- Multiple ChoicePlease save your changes before editing any questions.This was the first model of the atom ever proposed. It was simple and described atoms as tiny spheres that could not be broken down into smaller pieces.Democritus's model of the atomThe "Plum Pudding Model" of the atomThe "Rutherford Model" of the atomThe "Quantum Mechanical Model" of the atom
- Multiple ChoicePlease save your changes before editing any questions.This model added on to previous models by showing electrons existed at certain "energy levels". However it does not accurately show what those levels look like.The "Bohr Model" of the atomThe "Rutherford Model" of the atomThe "Plumb Pudding Model" of the atomThe "Quantum Mechanical Model" of the atom
- Multiple ChoicePlease save your changes before editing any questions.This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. Is shows electrons floating freely in a positive space.The "Plum Pudding Model" of the atomThe "Rutherford Model" of the atomDemocritus's model of the atomThe "Quantum Mechanical Model" of the atom
- Multiple ChoicePlease save your changes before editing any questions.Ernest Rutherford discovered that atoms were mostly _________________.negatively chargedpositively chargedelectronsempty space.
- Multiple ChoicePlease save your changes before editing any questions.A compound consists of 72.2% magnesium(Mg) and 27.8% nitrogen(N) by mass. What is the empirical formula?Mg4N3MgN2Mg3N2MgN
- Multiple ChoicePlease save your changes before editing any questions.You are given the following percentages: 40.05% S and 59.95% O. Find the empirical formula for these elements.SOSO2SO3SO4
- Multiple ChoicePlease save your changes before editing any questions.
How many molecules are in 2.5 mol of NaCl?
1.5 x 1024 molecules
1.5 molecules
4.15 molecules
1.5 x 1023 molecules
- Multiple ChoicePlease save your changes before editing any questions.Which pair has the same empirical formula?NaCrO4 and Na2Cr2O7C2H4O2 and C6H12O6C3H6O3 and C2H6O2CH4 and C2H6
- Multiple ChoicePlease save your changes before editing any questions.A formula with the lowest whole # ratio of elements in a compound is calledMolecular FormulaChemical FormulaEmpirical FormulaDistance Formula
- Multiple ChoicePlease save your changes before editing any questions.Glycerol has a molar mass of 92.09g/mol. Its percent composition is: 39.12% C, 8.75% H, and 51.12% O. What is the molecular formula for glycerol?C2H3O2CH2OC2H4O2C3H8O3
- Multiple ChoicePlease save your changes before editing any questions.
What is the correct representative particle for CO2?
Atoms
Molecules
Formula Units
- Multiple ChoicePlease save your changes before editing any questions.
What is the correct representative particle for potassium?
Atoms
Molecules
Formula Units
- Multiple ChoicePlease save your changes before editing any questions.
What is the correct representative particle for NaCl?
Formula Unit
Atom
Molecule
- Fill in the BlankPlease save your changes before editing any questions.
What is the correct molar mass for Mg(OH)2? (Round to the hundredths place)
- Multiple ChoicePlease save your changes before editing any questions.What is the percent by mass of oxygen in MgO?20%40%50%60%
- Multiple ChoicePlease save your changes before editing any questions.What is the percent composition by mass of sulfur in the compound MgSO4 (gram formula mass = 120 g/mol)?20%27%46%53%
- Multiple ChoicePlease save your changes before editing any questions.In which compound is the percent composition by mass of Cl equal to 42%?HClO (gram formula mass = 52 g/mol)HClO2 (gram formula mass = 68 g/mol)HClO3 (gram formula mass = 84 g/mol)HClO4 (gram formula mass = 100 g/mol)
- Multiple ChoicePlease save your changes before editing any questions.
What is the molarity of a 0.5L sample of a solution that contains 60.0 g of sodium hydroxide (NaOH)
0.8 M
1.5M
3.0M
6.0M
- Multiple ChoicePlease save your changes before editing any questions.
A student is preparing solutions for a laboratory experiment by dissolving solid solutes in liquid solvents. Which action will increase the rate of solubility
lowering the temperature of the solvent
stirring the solute in the solution
increasing the pressure on the solution
increasing the particle size of the solute
- Multiple ChoicePlease save your changes before editing any questions.
Which of the following is the correct formula for calculating molarity?
moles/liters of solution
moles/kg of solvent
# particles/Avogadro's #
theoretical yield/actual yield
- Multiple ChoicePlease save your changes before editing any questions.
Which of the following types of solutions has more room to dissolve solute?
supersaturated
saturated
unsaturated
- Multiple ChoicePlease save your changes before editing any questions.What is a solvent?The substance that does the dissolving in a solution.The substance that is being dissolved in a solution.The mixing of different substances.The process in which neutral molecules lose or gain electrons
- Multiple ChoicePlease save your changes before editing any questions.air is acompoundelementheterogeneous mixturesolution
- Multiple ChoicePlease save your changes before editing any questions.What is the molarity of 4 grams of sodium chloride in 3,800 mL of solution?0.018 M0.018 mol1.052 M1.052 mol
- Multiple ChoicePlease save your changes before editing any questions.Molarity is measured inmoles per kgmols per Lmoles per kJmoles per mL
- Multiple ChoicePlease save your changes before editing any questions.How many L are required to make 3.5 M hydrochloric acid using 1.1 moles?3.18 L0.31 L3.85 L4.6 L
- Multiple ChoicePlease save your changes before editing any questions.If you have 0.045 L of 0.465 M potassium bromide. How many moles of potassium bromide are present?20.9 mol0.021 mol0.02 mol0.0209 mol
- Multiple ChoicePlease save your changes before editing any questions.
A dilution is when
solute is added to the volume of solution
water is added to the volume of solution
solute is removed from the volume of solution
water is removed from the volume of solution
- Multiple ChoicePlease save your changes before editing any questions.
What volume, in milliliters, of 10.0 M NaOH is needed to prepare 300.0 mL of 2.00 M NaOH by dilution?
0.067 mL
60.0 mL
100 mL
125 mL
- Multiple ChoicePlease save your changes before editing any questions.
What is the molarity of a solution made by diluting 26.5 mL of 6.00M HNO3 to a volume of 250.0 mL?
15.9 M
0.636 M
0.642 M
1.59 M
- Multiple ChoicePlease save your changes before editing any questions.What volume of 1.50 M KBr can be made from 15.6 mL of concentrated KBr with a molarity of 9.65 M?150. mL151 mL1.00 L100. mL
- Multiple ChoicePlease save your changes before editing any questions.He developed the planetary model of the atom.RutherfordBohrChadwickDalton
- Multiple ChoicePlease save your changes before editing any questions.James Chadwick discovered the ________.protonneutronelectronnucleus
- Multiple ChoicePlease save your changes before editing any questions.What did Thomson discover?electronprotonneutronelectron cloud
- Multiple ChoicePlease save your changes before editing any questions.
Subatomic particles with a negative charge
Electrons
Neutrons
Protons
Quarks
- Multiple ChoicePlease save your changes before editing any questions.The scientist responsible for "discovering" the nucleus is:BohrRutherfordSchroedingerEinstein
- Multiple ChoicePlease save your changes before editing any questions.
Which part of the atomic theory did Niels Bohr prove?
there are electrons
there is a nucleus
electrons are in energy levels
gold foil experiment
- Multiple ChoicePlease save your changes before editing any questions.
What experiment did JJ Thomson use?
gold foil experiment
cathode ray tube experiment
- Multiple ChoicePlease save your changes before editing any questions.
John Dalton wrote postulates to make the idea of the atom useful. Which postulate below was proven wrong?
All elements are made up of tiny indivisible particles called atoms.
The atoms of one element are different from the atoms of another element.
Atoms of different elements chemically combine to form chemical compounds.
During chemical reactions, atoms are rearranged.
- Multiple ChoicePlease save your changes before editing any questions.
Which statement is incorrect?
The nucleus is very dense.
The nucleus contains protons and neutrons.
The nucleus is positively charged.
The nucleus is involved in chemical reactions.
- Multiple ChoicePlease save your changes before editing any questions.
The number of protons is equal to the number of electrons for an atom. This means an atom is-
electrically neutral
electrically positive
electrically negative
- Multiple ChoicePlease save your changes before editing any questions.
What determines chemical reactivity?
protons
neutrons
electrons
isotopes
- Multiple ChoicePlease save your changes before editing any questions.
What determines the identity of the atom?
protons
neutrons
electrons
isotopes
- Multiple ChoicePlease save your changes before editing any questions.