Quiz about Conservation of Mass/ Chem Reactions

Question 1

Anything that has mass & takes up space

Accepted Answer

matter

Answer

gravity

Answer

force

Answer

volume

Question 2

Smallest unit of an element

Accepted Answer

atom

Answer

compound

Answer

molecule

Answer

product

Question 3

Substance that cannot be broken into simpler substances

Accepted Answer

element

Answer

molecule

Answer

gram

Answer

proton

Question 4

Substance made up of chemically combined elements

Accepted Answer

compound

Answer

atom

Answer

element

Answer

electron

Question 5

Number placed in front of a chemical formula

Accepted Answer

coefficient

Answer

product

Answer

reactant

Answer

subscript

Question 6

Number written below & to the right of a chemical symbol

Accepted Answer

subscript

Answer

reactant

Answer

product

Answer

coefficient

Question 7

Substances that form as the result of a chemical reaction

Accepted Answer

products

Answer

reactants

Answer

coefficients

Answer

subscripts

Question 8

Substances present at the start of a chemical reaction

Accepted Answer

reactants

Answer

subscripts

Answer

coefficients

Answer

products

Question 9

A 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?

Accepted Answer

The mass of the balloon stays the same because the gas inside the balloon still has the same mass after it warms up.

Answer

The mass of the balloon increases because the size of the balloon has increased.

Answer

The mass of the balloon increases because the temperature of the balloon has increased.

Question 10

A 500-gram block of solid cheese is melted in a pot. Which is most likely the mass of the cheese after it is melted?

Accepted Answer

500 grams, because the cheese does not gain or lose mass just because it was melted

Answer

499 grams, because some of the cheese evaporates as it melts

Answer

502 grams, because the cheese absorbs heat as it melts

Question 11

Luke creates a model to observe the water cycle. He pours water into a clear container and closes the container and weighs it. Two days later, Luke observes about half of the water has evaporated and water droplets have formed on the sides of the container. Which is the weight of the container?

Accepted Answer

The container weighs the same as it did 2 days ago.

Answer

The container weighs much less than it did 2 days ago.

Answer

The container weighs half as much as it did 2 days ago.

Question 12

Jamie 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?

Accepted Answer

18 ounces

Answer

6

Answer

12

Question 13

Bob puts 200 grams of ice into a pitcher with 900 grams of water. He gets distracted and comes back later to find that the ice has melted in the water. How many grams of water does Bob now have in the pitcher?

Accepted Answer

1,100 g

Answer

200 g

Answer

700 g

Question 14

Which of the following is NOT a molecule?

Accepted Answer

Na

Answer

CO

Answer

H2O

Answer

Cl2

Question 15

Which of the terms best describes each individual NaCl?

Accepted Answer

Compound

Answer

Atom

Answer

Element

Answer

Electron

Question 16

Gold is a pure substance that cannot be broken down into simpler substances by physical means. Gold in this question is

Accepted Answer

an element.

Answer

a compound.

Answer

a mixture.

Answer

an ion.

Question 17

The nucleus of a typical atom is made up of

Accepted Answer

neutrons and protons.

Answer

electrons.

Answer

electrons and protons.

Answer

electrons and neutrons.

Question 18

The Law of Conservation of Mass states that:

Accepted Answer

mass cannot be created or destroyed.

Answer

the mass of the product is always greater than the mass of the reactants.

Answer

The mass of the products is always less than the mass of the reactants.

Answer

matter is always converted into an equal amount of energy.

Question 19

Liquid water evaporates on a hot day to become water vapor. How are the liquid water and the water vapor the same?

Accepted Answer

they have the same mass

Answer

they have the same shape.

Answer

they have the same temperature

Answer

they have the same volume

Question 20

A change in state rearranges atoms in a way that

Accepted Answer

does not create or destroy mass

Answer

Creates new mass

Answer

destroys mass

Answer

can create or destroy mass

Question 21

In a chemical reaction, 400 grams of reactant A are combined with 150 grams of reactant B. Both A and B react to completion. What will be the mass of the product?

Accepted Answer

550 grams

Answer

250 grams

Answer

500 grams

Answer

it cannot be determined from the given information

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