Quiz about Chemical reactions

Question 1

Reactants will have different _________________ than the products

Accepted Answer

properties

Answer

chemical reactions

Answer

melting/boiling point, density, solubility

Answer

mixing, heating, cooling

Question 2

One or more substances form from one or more other substances during a..

Accepted Answer

chemical reaction

Answer

mixing, cooling, heating

Answer

product

Answer

reactant

Question 3

Properties must be tested ________ and _________ to confirm that a chemical reaction has taken place

Accepted Answer

before and after

Answer

melting/boiling point during the reaction

Answer

during data collected

Question 4

What conditions will help cause a substance to undergo a chemical reaction

Accepted Answer

mixing, heating, cooling

Answer

density

Answer

melting/boiling point

Question 5

Striking a match on the box is an example of what type of condition?

Accepted Answer

heating

Answer

cooling

Answer

mixing

Question 6

To confirm that a chemical reaction has taken place, you must test ___________ before and after

Accepted Answer

properties

Answer

15 minutes

Answer

by tasing

Question 7

A substance that exists before a chemical reaction takes place and changes as a result of the reaction is called a

Accepted Answer

reactant

Answer

product

Answer

chemical change

Answer

chemical properties

Question 8

New substance that forms during a chemical reaction

Accepted Answer

product

Answer

chemical reaction

Answer

reactant

Answer

scientific evidence

Question 9

Data that can be used to support a scientific claim or argument

Accepted Answer

scientific evidence

Answer

chemical reaction

Answer

reactant

Answer

product

Question 10

A shorthand notation made up of arrows and chemical formulas for reactants and products that summarizes what happens during a chemical reaction is called:

Accepted Answer

chemical equation

Answer

Chemical reaction

Answer

scientific law

Answer

law of conservation of matter

Question 11

This is the scientific law that states that matter cannot be created or destroyed.

Accepted Answer

law of conservation of matter

Answer

law of Atomic Equations

Answer

law of conservation of elements

Answer

law of conservation of energy

Question 12

This is a verbal or mathematical description of a natural phenomenon: unlike scientific theories, they do not explain the phenomenon.

Accepted Answer

scientific law

Answer

Law of science

Answer

Law of conservation of matter

Answer

None of the above

Question 13

How do you know when chemical reaction is happening?

Accepted Answer

Atoms in the reactants break apart and regroup to make one or more new products.

Answer

Atoms remain in the same place and position in both a reactant and a product

Answer

Atoms in products break apart and regroup to make one or more new reactants.

Answer

Chemical reactions are only visual. If can't see it, it hasn't happened.

Question 14

Which answer is not included in the three different ways that atoms can regroup?

Accepted Answer

Staying the same

Answer

Breaking apart

Answer

Joining Together

Answer

Swapping

Question 15

What happens to the mass of the reactants and products during a chemical reaction?

Accepted Answer

The mass of the reactant is always the same as the mass of the product.

Answer

The mass of the reactant is always higher than the mass of the product

Answer

The mass of the reactant is always lower than the mass of the product.

Question 16

What does the coefficient tell us (number to the left of the chemical formula)?

Accepted Answer

How many molecules of a particular substance there are.

Answer

How many molecules there are in the reactant.

Answer

How many molecules there are in the product.

Answer

How many atoms there are in a molecule.

Question 17

The Law of conservation of matter states that matter CAN be created or destroyed in a chemical reaction.

Accepted Answer

False

Answer

True

Question 18

Chemical reactions rearrange atoms in the reactants to form products.

Accepted Answer

True

Answer

False

Question 19

If I eat something, my stomach helps a chemical reaction occur. What happens to the mass of the products after I have eaten them compared to the mass of the products before I ate them?

Accepted Answer

The mass of the food digested is the smae as the mass of the food before I ate it.

Answer

The mass of the food digested is more than the mass of the food before I ate it.

Answer

The mass of the food digested is less than the mass of the food before I ate it.

Question 20

Matter before reaction equals to matter after reaction

Accepted Answer

True

Answer

False

Question 21

Select all true statement about writing chemical equations.

Accepted Answer

the reactants on the left side of the equation

Accepted Answer

the products on the right side of the equation

Accepted Answer

An arrow separates the reactants and the products

Accepted Answer

A whole number to the left of a formula tells how many molecules of that substance are involved in the reaction.

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