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- 1. 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
- 2. 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
- 3. Multiple ChoiceMatter can not be created nor destroyed: it can only beDestroyed a little bitInvisibleTransformed, changedNone of the above
- 4. 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
- 5. 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
- 6. Multiple ChoiceIn the reaction shown by the equation, 252 grams of FeCl2 and 70 grams of Cl2 are consumed.
2FeCl2+ Cl2--> 2FeCl3
How many grams of FeCl3 are produced?161 grams182 grams322 grams392 grams - 7. Multiple Choice24 g of magnesium reacts with 38 g of fluorine to produce _____ g magnesium fluoride62382414
- 8. Multiple Choice
Sodium and chlorine combine to form sodium chloride, or table salt. Sodium and chlorine are:
Producers
Products
Reactionaries
Reactants
- 9. 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
- 10. 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
- 11. Multiple Choice
What is the part of the chemical equation in green called?
Fe + S → FeS
products
reactants
yield
input
- 12. 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.
- 13. Multiple Choice
What do we call the chemicals that result from a chemical reaction?
reactants
products
subscripts
coefficients
- 14. 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.
- 15. Multiple Choice12g of Carbon react with 16g of Oxygen, how much carbon monoxide (CO) is formed?28 g4g30g12g
- Answer choicesTagsAnswer choicesTags