Chapter 6

Question 1

A _____ reaction is when substances are changed into other substances.

Answer 1

chemical

Question 2

_____ are compounds and or elements.

Answer 2

Substances

Question 3

In a chemical reaction, there are a number of _____ that show that a chemical reaction has taken place.

They include:

1. Visibly
2. Heat is given or taken in

Answer 3

clues

(Urine Analysis DipStick, Macro)

Question 4

In an equation, ______ makes sure that all atoms present in the reactants are accounted for among the products

Answer 4

balancing

Question 5

These are _____.

Answer 5

Reactants

Question 6

These are _____.

Answer 6

Products

Question 7

These are _____.

Answer 7

Arrow

Question 8

These are _____.

Answer 8

Coefficients

Question 9

A chemical equation shows the _____ and _____.

(And other factors)

Answer 9

reactants and products

Question 10

Reactants are chemical substances that are eventually _____.

It is number _____.

Answer 10

changed

4

Question 11

Products are chemical substances that are _____.

It is number _____.

Answer 11

formed

5

Question 12

The arrow in a chemical formula shows that a chemical reaction _____ taken place.

It is number _____.

Answer 12

has

2

Question 13

A Chemical Reaction’s Formula Format is as follows:

_____ ➞ _____.

Answer 13

Reactants → Products

Question 14

The Coefficients indicate the number of each _____ species that reacts or is formed.

It is number _____.

Answer 14

chemical

1

Question 15

the (aq) symbol stands for _____ _____ _____.

Answer 15

in aqueous solution.

Question 16

the (g) symbol stands for _____ _____ _____.

Answer 16

gass

Question 17

the (l) symbol stands for _____ _____ _____.

Answer 17

liquid

Question 18

the (s) symbol stands for _____ _____ _____.

Answer 18

solid

Question 19

The law of conservation of mass states that matter is neither _____ nor ____.

Answer 19

created nor destroyed

Question 20

Chemical Equations Obey the law of _____ of _____.

Answer 20

conservation of mass.

Question 21

Chemical Equation Calculations are used to calculate how much of each _____ is needed and what will be _____.

Answer 21

element

produced

Question 22

A Balanced Equation has the same number of each _____ of _____ on both sides.

Answer 22

kind of element

Question 23

Within Chemical Equations (Compounds) – The compounds or the subscripts (can or can not) be changed. This will not balance the equation. Because that would change the compound.

Answer 23

can not

Question 24

Chemical Equations (Coefficients) – The coefficients (can or can not) be placed in front of compounds or elements in the equations. This will balance the equation.

Answer 24

can

Question 25

**Coefficients Are Used to** tell how many **\_\_\_\_\_** or **\_\_\_\_\_** there are.

Answer 25

atoms or molecules

Question 26

**Balancing by \_\_\_\_\_** simply means that each atom is taken in turn and balanced by inserting appropriate coefficients on one side or the other.

Answer 26

**Inspection**

Question 27

**The _____ process** is a method for preparing ammonia (NH3) by reacting nitrogen gas with hydrogen gas.

Answer 27

Haber

Question 28

**The _____ formulas** show different types of elements in a molecule and the lowest whole number-ratio of each atom in the molecule.

Answer 28

**empirical**

Question 29

**The _____ \_\_\_\_\_ _____ Ratio** is the accepted convention as the “best” balanced equation with the smallest integers (whole numbers). These integers are called the coefficients for the balanced equation.

Answer 29

**Lowest Whole number**

Question 30

**Multiplication or Division of Chemical Equations** is a balanced equation can be multiplied or divided by any number to give a new balanced equation. ## Footnote **True or False**

Answer 30

true

Question 31

**Multiplication or Division of Chemical Equations** is a balanced equation can not be multiplied or divided by any number to give a new balanced equation. ## Footnote **True or False**

Answer 31