Have an account?
Skip to Content
Build your own quiz
Suggestions for you
28 questions
Show Answers
See Preview
- 1. Multiple ChoiceThe molar mass of an element is equal to its...Atomic massAtomic numberOxidation numberValence electrons
- 2. Multiple ChoiceThe mass of one mole of substance is called...molecular massmole constantmolar massatomic weight
- 3. Multiple ChoiceWhat is the molar mass of table salt (NaCl)?116.886 g/mol35.453 g/mol22.990 g/mol58.443 g/mol
- 4. Multiple ChoiceWhat is the molar mass of CO2?12163244
- 5. Multiple ChoiceHow many particles are in a mole?602602 million602 moles6.02 x 1023
- 6. Multiple Choice
Calculate the molar mass of KOH.
28 g/mol
56 g/mol
84 g/mol
112 g/mol
- 7. Multiple ChoiceWhat is the definition of molar mass?number of grams per one mole of a substancewhole number ratio that is a multiple of a chemical formulasimplest, whole number ratio of a chemical formula6.02 x 10^23 particles per one mole of a substance
- 8. Multiple ChoiceWhat is the Law of Conservation of mass?Mass is created in a chemical reactionMass is created in a physical changeNew chemicals formed from a chemical reaction have a larger overall mass than the original reactantsMass is never created or destroyed
- 9. Multiple ChoiceIn a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B should have?4g5g9g14g
- 10. Multiple ChoiceIs this equation balanced or unbalanced?
2Fe2O3 + 3C --> 4Fe + 3 CO2balancedunbalanced - 11. Multiple ChoiceWhich is Chemical Equation is Balanced?CH₄+O₂------CO₂+2H₂OH₂+O₂-----2H₂O₄4Al+3O₂-----2Al₂O₃
- 12. Multiple ChoiceHow many nitrogen atoms does NH3 have?1234
- 13. Multiple ChoiceIs this equation balanced or unbalanced?
2Fe2O3 + 3C --> 4Fe + 3 CO2balancedunbalanced - 14. Multiple Choice
How many oxygen atoms are in this chemical formula?6 oxygen atoms2 oxygen atoms3 oxygen atoms4 oxygen atoms - 15. Multiple ChoiceWhat is the law of conservation of mass?The amount of matter changes when reacted or changed.The mass of all reactants are changed during a physical or chemical changeThe mass of the reactants equals the mass of the productsThe mass of the products is different than the mass of the reactants.
- 16. Multiple ChoiceHow many Sulfur atoms are in this compound?
Al2(SO4)34231 - 17. Multiple Choice
What reaction involves one element replacing an element in a compound that is from the same activity series?
Synthesis
Combustion
Single Replacement
Double Replacement
- 18. Multiple Choice
Identify the reaction type for the following equation:
K + F2 --> KF
Double replacement
Single Replacement
Synthesis
Decomposition
- 19. Multiple Choice
Which of the following reactions involves the ions of two compounds exchanging places to form two new compounds?
Synthesis reaction
Single-replacement reaction
Double-replacement reaction
Combustion
- 20. Multiple Choice
Which of the following reactions involves a single compound producing two or more simpler substances?
Synthesis reaction
Single-replacement reaction
Double-replacement reaction
Decomposition
- 21. Multiple Choice
What reaction involves two or more substances combining to form a single compound?
Synthesis reaction
Single-replacement reaction
Double-replacement reaction
Decomposition
- 22. Multiple Choice
An empirical formula:
is a formula that calculates the coefficients of a compound in a balanced equation.
shows the most basic integer ratio of each type of element in the molecule
- 23. Multiple ChoiceWhich of the following is considered an empirical formula?CH3COOHC6H12O6H2O
- 24. Multiple ChoiceA formula with the lowest whole # ratio of elements in a compound is calledMolecular FormulaChemical FormulaEmpirical FormulaDistance Formula
- 25. Multiple Choice
C4H6 What is the empirical formula?
CH
CH3
C2H3
C4H6
- 26. Multiple Choice
What is the empirical formula? Br2O6
BrO3
Br6O2
BrO
Br2O6
- 27. Multiple ChoiceWhat is the best formula for this molecule?C3H4O3C3H4OC3H4O2C3H4O4
- 28. Multiple ChoiceWhat is the best formula for this molecule?C5HO4C5HO7C5HO8
- Answer choicesTagsAnswer choicesTags