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- 1. Multiple ChoiceHow many atoms of carbon (C) are in C6H12O6?361224
- 2. Multiple ChoiceHow many Sodium (Na) are in 6NaCl?1126
- 3. Multiple ChoiceHow many Aluminum are in Al2O3?325
- 4. Multiple ChoiceHow many Hydrogen are in 4H2O?6824
- 5. Multiple ChoiceWhich of the following shows the correct way to balance the chemical equation?
Fe + O2 -> Fe2O34Fe + 3O2 -> 2Fe2O32 Fe + 3O2 -> Fe2O64 Fe + O6 -> 2Fe2O3None of the options are correctly balanced. - 6. Multiple ChoiceWhich of the following reactions is balanced?2CH4 + O2 -> CO2 + H2OCH4 + 2O2 -> CO2 + H2OCH4 + 2O2 -> CO2 + 2H2ONone of the chemical equations are balanced.
- 7. Multiple ChoiceHow many HCl molecules do you need to balance this equation?
Mg + __HCl ---> MgCl2 + H21234 - 8. Multiple ChoiceBalance this equation.
_CF4 + _Br2 -- _CBr4 + _F22,1,2,11,2,2,11,2,1,22,2,2,2 - 9. Multiple ChoiceBalance this equation.
_CH4 + _O2 --> _CO2 + _H2O1,2,1,12,1,2,11,2,1,20,2,0,2 - 10. Multiple ChoiceBalance this equation
_Al +_HCl --> _H2 +_AlCl32, 6, 3, 2it is already balanced4, 12, 3, 42, 1, 4, 5 - 11. Multiple ChoiceThe substances listed on the right side of a chemical equation are theYieldsReactantsProductsPrecipitates
- 12. Multiple ChoiceThe substances listed on the left side of a chemical equation are theProductsCoefficientsPrecipitatesReactants
- 13. Multiple ChoiceIn chemical reactions, what does the principle of conservation of mass mean?Matter is not created or destroyed.The total mass of the reactants is greater than the total mass of the products.The total mass of the reactants is less than the total mass of the products.Matter is not changed.
- 14. Multiple Choice
Identify the reactant(s) and product(s) of the reaction.All three are reactants and none are products.Hydrogen and water are the reactants, and oxygen is the product.Water and oxygen are the reactants, and hydrogen is the product.Hydrogen and oxygen are the reactants, and water is the product. - 15. Multiple Choice
Which is the Law of Conservation of Matter?
matter cannot be created or destroyed, it only rearranges
matter can be created but it cannot be destroyed, it never rearranges
matter can be destroyed but it cannot be created, it usually just rearranges
matter is an unproven theory created by Hans Geiger
- 16. Multiple ChoiceWhich one is a compound?CoBrFeCO
- 17. Multiple ChoiceWhich one is an element?CoCOCO2CO3-2
- 18. Multiple ChoiceHow many elements are found in the following molecule? Mg(ClO3)21435
- 19. Multiple ChoiceWhich number should go in the blank?
_ H2 + O2 -> 2 H2O1230 - 20. Multiple ChoiceWhich number should go in the blank?
2 Na+ _ Cl2 -> 2 NaCl1230 - Answer choicesTagsAnswer choicesTags