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Worksheets

Chm130 vocabulary

Total questions: 20

Worksheet time: 11mins

Name
Class
Date
1.

More H + than OH- and a pH is less than 7.

a)

Acid

b)

Base

c)

Catalysts

d)

Buffer

2.

The amount of product actually produced in a chemical reaction (compared with the theoretical yield.)

a)

Theoretical yield

b)

Actual yield

c)

Molar mass

d)

Limiting reagent

3.

More OH- than H+ and pH is greater than 7.

a)

Acid

b)

Catalyst

c)

Base

d)

Buffer

4.

A substance that influences the rate of a reaction and can be recovered essentially unchanged at the end of the reaction.

a)

Buffer

b)

Acid

c)

Base

d)

Catalyst

5.

A digit placed in front of a chemical formula to balance the atoms in a Chemical.

a)

Coefficient

b)

Limiting reagent

c)

Subscript

d)

Molar volume

6.

The compound formula expressing the simplest ratio of atoms present in a compound.

a)

Empirical formula

b)

Molecular formula

c)

Percent composition of a compound

d)

Molar volume

7.

A chemical reaction that absorb heat.

a)

Exothermic

b)

Stoichiometry

c)

Endothermic

d)

Acid

8.

A chemical reaction that gives off heat energy.

a)

Exothermic

b)

Endothermic

c)

Acid

d)

Base

9.

Mass per unit volume for a gas in units grams per liter.

a)

Molar mass

b)

Molar volume

c)

Coefficient

d)

Gas density

10.

The substance in a reaction that controls the amount of product formed.

a)

Actual yield

b)

Catalysts

c)

Limit reagent

d)

Gas density

11.

the mass of Avogadro' says number of atoms or molecules. The sum of the atomic masses of all the atoms in an element, compound, or ion. The mass of a mole of any formula unit. It is known as the molecular weight.

a)

Molar volume

b)

Molar mass.

c)

Molecular formula

d)

Empirical formula

12.

The volume occupied by 1 mole of any gas at standard conditions.

a)

Molar volume

b)

Molar mass

c)

Molecular formula

d)

Empirical formula

13.

The compound formula that expresses the actual number of atoms present in a compound.

a)

Empirical formula

b)

Actual yield

c)

Molecular formula

d)

Theoretical yield

14.

The compound formula that expresses the actual number of atoms present in a compound.

a)

Empirical formula

b)

Actual yield

c)

Molecular formula

d)

Theoretical yield

15.

The mass percent represented by each element in a compound.

a)

Percent composition of a compound

b)

Actual yield

c)

Theoretical yield

d)

Molar mass

16.

The quantitative relationship among substances in a chemical reaction.

a)

Empirical formula

b)

Molecular formula

c)

Molar volume

d)

Stoichiometry

17.

A digit in a chemical formula that represents the number of atoms of each elements that is present in a compound.

a)

Molecular formula

b)

coefficient

c)

Subscript

d)

Catalyst

18.

The maximum amount of product that can be produced according to a balanced equation.

a)

Actual yield

b)

Theoretical yield

c)

Limiting reagent

d)

Molar mass

19.

The density of 1 mole of helium gas at standard conditions is 0.179 g/L

a)

True

b)

False

20.

Salt and water are made by reacting ____ and ____. Check all that apply

a)

Acid

b)

Base

c)

metal

d)

Ammonia