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- 1. Multiple ChoiceA 500-gram block of solid cheese is melted in a pot. Which is most likely the mass of the cheese after it is melted?500 grams, because the cheese does not gain or lose mass just because it was melted499 grams, because some of the cheese evaporates as it melts502 grams, because the cheese absorbs heat as it melts
- 2. Multiple ChoiceA student notices that an inflated balloon gets larger when it is warmed by a lamp. Which best describes the mass of the balloon as a result of this change?The mass of the balloon increases because the size of the balloon has increased.The mass of the balloon increases because the temperature of the balloon has increased.The mass of the balloon stays the same because the gas inside the balloon still has the same mass after it warms up.
- 3. Multiple ChoiceJamie weighs a glass of water and observes its weight to be 12 ounces. Jamie then adds 6 ice cubes to the glass of water. Each ice cube weighs one ounce. After all of the ice cubes have melted, what will be theapproximate weight of the glass of water?61218 ounces
- 4. 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
- 5. Multiple Choice
In a reaction A + B ----> C, reactant A has 5g and product C has 9g. How many grams does reactant B have?
4g
5g
9g
14g
- 6. Multiple ChoiceIf reaction starts with 20g of reactants it should producea total of 40g of productsa total of 10g of productsa total of 80 g of productsa total of 20g of products
- 7. Multiple ChoiceWhat will weigh more when a chemical change is complete? The reactants before the chemical reaction, or the product after the reaction is complete?They both will weigh the sameThe product always weighs more than the reactantThe reactant will weigh more than the productThey both will loose mass after the reaction
- 8. Multiple ChoiceIf a reaction starts with a total 75g of reactants it should producea total of 40g of productsa total of 75g of productsa total of 180 g of productsNone of the above
- 9. Multiple ChoiceIn the reaction AB-----> A + B reactant AB has 12g and product B has 5g. How many grams should product A have?17g2g7gNone of the above
- 10. Multiple Choice12g of Carbon react with 16g of Oxygen, how much carbon monoxide (CO) is formed?28 g4g30g12g
- 11. Multiple Choice24 g of magnesium reacts with 38 g of fluorine to produce _____ g magnesium fluoride62382414
- 12. Multiple Choice
32 g of Oxygen completely reacts with 8 g of Hydrogen to produce _____ g Water
8
12
24
40
- 13. Multiple Choice
4 grams of hydrogen and 32 grams of oxygen will combine to form:
36 grams of water
28 grams of hydroxide
32 grams of oxygen
36 grams of deuterium
- 14. Multiple Choice
In a chemical reaction, 4 grams of sodium must combine with how many grams of chlorine to produce 10 grams of table salt?
4 grams
6 grams
8 grams
10 grams
- 15. Multiple Choice
Why does this picture demonstrate the Law of Conservation of Mass?
the number of atoms of each element are the same on both sides
they start out separate and end up combined
the same elements are used
it doesn't demonstrate the Law of Conservation of Mass
- 16. Multiple Choice
When a log is burned, what happens to the wood?
The mass stays the same, but becomes smoke and ash.
It disappears.
The mass changes as it goes away.
Nothing. You're imagining things.
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