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- 1. Multiple Choice
How many oxygen atoms are in the products for the chemical reaction below?
2
3
5
6
- 2. Multiple Choice
What do we call the chemicals that result from a chemical reaction?
reactants
products
subscripts
coefficients
- 3. Multiple Choice
The Law of Conservation of Mass says that matter can neither be __________ or __________.
created; destroyed
recycled; renewed
subtracted; added
joined; separated
- 4. Multiple Choice
How many atoms are in the products below?
7
10
17
20
- 5. Multiple Choice
According to the Law of Conservation of Mass, what happens to the wood and oxygen when it is burned?
The wood disappears.
It stays the same chemically.
The atoms in the wood and oxygen rearrange and form smoke and ash.
Nothing.
- 6. Multiple ChoiceSubstances present at the start of a chemical reactionsubscriptscoefficientsreactantsproducts
- 7. Multiple ChoiceA 55-gram egg is placed in a pot. After the egg is boiled, which is most likely the mass of the egg?5055
- 8. Multiple ChoiceWhat does the principle of conservation of mass mean?The total mass of the reactants is more than the productsMatter is not created or destroyedThe total mass of the reactants is less than the products
- 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?
H2 + O2 --> H2Obalancedunbalanced - 11. Multiple Choice12g of Carbon react with 16g of Oxygen, how much carbon monoxide (CO) is formed?28 g4g30g12g
- 12. Multiple Choice
When sodium and chlorine combine to form sodium chloride, sodium chloride is the:
Originator
Reactant
Product
Produce
- 13. Multiple ChoiceIs melting butter for popcorn a chemical or physical change?chemicalphysical
- 14. Multiple ChoiceWhich of the following is a sign that a chemical reaction has occurred?change in shapemeltingformation of a gasdissolving
- 15. Multiple Choice
How many Hydrogen atoms are in 4H2O?
6
8
2
4
- Answer choicesTagsAnswer choicesTags