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- 1. Multiple ChoiceHow many elements does PbNO3 have?2345
- 2. Multiple ChoiceHow many nitrogen atoms does NH3 have?1234
- 3. Multiple ChoiceA chemical equation tells usthe reactants and the products.the elements that make up the reactants and the products.the number of atoms that make up the reactants and the products.All of the above.
- 4. Multiple ChoiceWhat is the reactant in the following equation?
2NaHCO3 -> Na2CO3 + CO2 + H2ONaHCO3Na2CO3CO2H2O - 5. Multiple ChoiceWhich of the following describes the law of conservation of mass?In a reaction, atoms are created or destroyed.In a reaction, atoms are not lost or made.In a reaction, the mass of the product may be more or less than the reactants.In a reaction, mass never stays the same.
- 6. Multiple ChoiceFor the equation:
2H2 + O2 --> 2H2O
How much H2O will be produced using only one O2?1/2124 - 7. Multiple ChoiceFor the equation:
2H2 + O2 --> 2H2O
How much H2O will be produced if we react 4g of H2 and 32g of O2?4g32g36g28g - 8. Multiple ChoiceWhich of the following is a balanced equation?Na + Cl2 --> NaClH2 + O2 --> H2OCa + Br --> CaBr2Na + F --> NaF
- 9. Multiple ChoiceWhat will happen to the mass of the product if I double the mass of the reactants?It will decrease by half.It will increase by half.It will double in amount.The mass remains the same.
- 10. Multiple ChoiceBalance the following equation:
__N2 + __H2 --> __NH3N2 + 3H2 --> 2NH32N2 + 3H2 --> NH33N2 + 2H2 --> 2NH3N2 + H2 --> NH3 - Answer choicesTagsAnswer choicesTags