Have an account?
Skip to Content
40 questions
Show Answers
See Preview
- Multiple ChoicePlease save your changes before editing any questions.If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating thetheoretical yieldmole ratioactual yieldpercentage yield
- Multiple ChoicePlease save your changes before editing any questions.Mole ratios are obtained from thebalanced chemical equationperiodic tablemolar mass
- Multiple ChoicePlease save your changes before editing any questions.What is the mole ratio of H2O to H3PO4 in the following chemical equation? P4O10 + 6 H2O --> 4 H3PO46:44:61:33:1
- Multiple ChoicePlease save your changes before editing any questions.2Al + 3H2SO4 -> Al2(SO4)3 + 3H2
How many grams of aluminum sulfate would be formed if 250g H2SO4 completely reacted with aluminum?0.85 g290 g450 g870 g - Multiple ChoicePlease save your changes before editing any questions.For the reaction represented by the equation Cl2 + 2KBr → Br2 + 2KCl, how many grams of potassium chloride can be produced from 356 grams potassium bromide?749 g225 g479 g814 g
- Multiple ChoicePlease save your changes before editing any questions.When does a chemical reaction stop?When the lab is finishedWhen the excess reactant is used upWhen the limiting reactant is used upChemical reactions never stop
- Multiple ChoicePlease save your changes before editing any questions.Identify the limiting reagent when 6.00 g HCl combines with 5.00 g Mg to form MgCl2.
Mg + 2HCl --> MgCl2 + H2
MgH2MgCl2HCl - Multiple ChoicePlease save your changes before editing any questions.How many grams are in 7.8 moles of NaCl?476grams460 grams452 grams462 grams
- Multiple ChoicePlease save your changes before editing any questions.Balance the following reaction :
CaC₂(s) + H₂O(l) --> C₂H₂(g) + Ca(OH)₂(aq)1,2,2,21,2,1,12,1,1,12,1,2,1 - Multiple ChoicePlease save your changes before editing any questions.Using the following equation:
Fe2O3(s) + 3H2(g) → 2Fe(s) + 3H2O(l)
How many moles of iron can be made from 6 moles H2?4 moles Fe6 moles Fe9 moles Fe2 moles Fe - Multiple ChoicePlease save your changes before editing any questions.
9. Complete the equation for the percent yield of a chemical reaction:
Percent yield=(________)÷(________)×100%actual yield; theoretical yieldtheoretical yield; actual yield - Multiple ChoicePlease save your changes before editing any questions.11.
LiOH + KCl → LiCl + KOH
b) I actually produced 6 grams of lithium chloride and I began this reaction with 20 grams of lithium hydroxide. What is my percent yield?16.9%5.91%1.88%12.3% - Multiple ChoicePlease save your changes before editing any questions.Fe (s) + S (l) --> FeS (s)
In the experiment above, 7.62 g of Fe are allowed to react with 8.67 g of S.
How much FeS is formed?14.8 g12.2 g13.7 g19.9 g - Multiple ChoicePlease save your changes before editing any questions.Gas pressure is caused bygas molecules colliding with surfacesgas molecules condensing to a liquidgas molecules hitting other gas moleculebarometers
- Multiple ChoicePlease save your changes before editing any questions.Flask 1 contain the most moleculesFlask 2 contain the most moleculesFlask 3 contain the most moleculesFlask 4 contain the most molecules
- Multiple ChoicePlease save your changes before editing any questions.Flask 1 contain the least pressureFlask 2 contain the least pressureFlask 3 contain the least pressureFlask 4 contain the least pressure
- Multiple ChoicePlease save your changes before editing any questions.Gases do not move in straight lineMost of the volume of gas is empty spaceGas particles are not in constant random motionGas particles attract each other
- Multiple ChoicePlease save your changes before editing any questions.Gas particles are elastic and do not attract each other.The kinetic energy of gas is dependent on temperatureEnergy is not lost when gas particles collide with each other or with the walls of the container.All of the above
- Multiple ChoicePlease save your changes before editing any questions.When the temperature is constant (k) inside a balloon, if you add pressure on it, the volume will .....DecreaseIncreaseNot Change at allParticles will solidify
- Multiple ChoicePlease save your changes before editing any questions.For example, if you increase the temperature of a gas inside a balloon, the balloon will....
[pressure is constant (k)]Expand (increase in volume)Deflate (decrease in volume) - Multiple ChoicePlease save your changes before editing any questions.Pick the best answer to explain all properties of gases....They're fluids
Can be compressed
Little space between particlesThey're solids
Can be compressed
Lots of space between particlesThey're fluids
Cannot be compressed
Lots of space between particlesThey're fluids
Can be compressed
Lots of space between particles - Multiple ChoicePlease save your changes before editing any questions.Why does a car get low tire pressure in the COLD...what two variables are to blame?Pressure and TemperatureTemperature and VolumeVolume and PressureTemperature and Weight
- Multiple ChoicePlease save your changes before editing any questions.
How do you convert C to Kelvin (K)?
C + 273
C x 273
C / 273
C + 32 + 273
- Multiple ChoicePlease save your changes before editing any questions.Directly proportional means that as one value increases ....................the other stays the samethe other increases as wellthe other decereasesthe other goes to zero
- Multiple ChoicePlease save your changes before editing any questions.Inversely proportional means as one value increases the other.............increasesdecreasesstays the samegoes to zero
- Multiple ChoicePlease save your changes before editing any questions.How do gas molecules move?in an orderly fashionconstantly and randomlyin straight line pathsin a circular motion
- Multiple ChoicePlease save your changes before editing any questions.When the temperature of matter increases the particles...speed up and move closerspeed up and move farther apartslow down and move closer togetherslow down and move farther apart
- Multiple ChoicePlease save your changes before editing any questions.Which container will have a lower pressure?leftrightthey both have the same pressureI don't know
- Multiple ChoicePlease save your changes before editing any questions.Boyle's law : When _______ is held constant, the pressure and volume of a gas are ________ proportionaltemperature, equallymass, inverselytemperature, inverselymass, equally
- Multiple ChoicePlease save your changes before editing any questions.
A sample of nitrogen gas has a volume of 32.4 L at 20°C. The gas is heated to 220ºC at constant pressure. What is the final volume of nitrogen?
2.94 L
19.3 L
31.4 L
54.5 L
- Multiple ChoicePlease save your changes before editing any questions.
The gas pressure in an aerosol can is 3.5 atm at 25°C. If the gas is an ideal gas, what pressure would develop in the can if it were heated to 175°C?
3.5 atm
4.8 atm
5.3 atm
7.5 atm
- Multiple ChoicePlease save your changes before editing any questions.
A 1.00 L sample of gas at 760 torr is compressed to 0.800 L at constant temperature. Calculate the final pressure of the gas.
750 torr
800 torr
950 torr
1500 torr
- Multiple ChoicePlease save your changes before editing any questions.
A 4.00 L sample of gas at 300C and 1.00 atm is changed to 00C and 800 torr. What is the new volume?
1.32 L
2.52 L
3.42 L
5.65 L
- Multiple ChoicePlease save your changes before editing any questions.
What is the empirical formula for C4H6
CH
CH3
C2H3
C4H6
- Multiple ChoicePlease save your changes before editing any questions.
Find the empirical formula for a compound which contains 32.8% chromium and 67.2% chlorine.
CrCl
CrCl3
Cr3Cl
Cr2Cl6
- Multiple ChoicePlease save your changes before editing any questions.
A compound containing 92.3 percent carbon and 7.7 percent hydrogen. What is the empirical formula?
CH
CH2
C2H
C2H2
- Multiple ChoicePlease save your changes before editing any questions.
Compound contains 42.05 g of nitrogen and 95.95 g of oxygen. What is the formula?
NO
NO2
N2O
N2O4
- Multiple ChoicePlease save your changes before editing any questions.What is the molecular formula if the empirical formula is C2H5 and the molecular molar mass is 58.14 g/mol?C2H5C4H10C1H2.5C4H8
- Multiple ChoicePlease save your changes before editing any questions.What is the empirical formula of the following molecular formula: C3H6C3H6CH2C2H4CH3
- Multiple ChoicePlease save your changes before editing any questions.What is the molecular formula if the empirical formula is CH2O and the molecular molar mass is 180.18?CH2OC2H4O2C4H8O4C6H12O6