wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

Stoichiometry: Chemistry for Massive Creatures

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

Chemistry helps us understand the biggest stuff in the universe by helping us understand ___

a)

the most massive

b)

the tiniest

c)

the most colorful

d)

the least plentiful

2.

What is the molecular formula for sucrose, the common table sugar put in tea?

a)

C12H22O11

b)

C11H6O12

c)

C12H6O6

d)

C6H11O6

3.

The science of measuring chemicals that go into and come out of any given reaction is called ___

a)

meteorology

b)

atomic mass measuring

c)

molar metrology

d)

stoichiometry

4.

The average atomic mass of all of the naturally occurring isotopes of a given element is called ___

a)

the isotope number

b)

stoichiometry

c)

relative atomic mass

d)

the basic atomic mass unit

5.

All of the natural carbon on Earth occurs as one of three isotopes, each with ___

a)

a mass of 12.01

b)

six neutrons

c)

six protons

d)

12 protons

6.

The relative atomic mass of carbon is ___

a)

1/12 of an amu

b)

1 amu

c)

12 amu

d)

12.01 amu

7.

Since 1961, a single amu has been defined as the mass of ___

a)

a hydrogen atom

b)

1/16th of an oxygen atom

c)

1/12th of an atom of carbon-12

d)

1/18th of an atom of oxygen-18

8.

In what year were isotopes discovered?

a)

1812

b)

1869

c)

1912

d)

1961

9.

What is the relative atomic mass of oxygen?

a)

8 amu

b)

16 amu

c)

17 amu

d)

18 amu

10.

In chemistry, the mole is defined as the number of atoms in ___

a)

1 gram of hydrogen 1

b)

12 grams of carbon-12

c)

an average adult star-nosed mole

d)

16 grams of oxygen-16

11.

How many atoms are in 12 grams of carbon-12?

a)

6.022 x 1023 atoms

b)

3.022 x 1026 atoms

c)

2.602 x 1032 atoms

d)

6.202 x 1020 atoms

12.

The number 6.022 x 1023 is known as ___

a)

Avocado's constant

b)

Avogadro's number

c)

Dalton's digit

d)

the Lavoisier numeral

13.

A dozen roses is twelve roses, but a mole of roses is ___

a)

144 roses

b)

2.066 x 1023 roses

c)

6.022 x 1023 roses

d)

3.062 x 1032 roses

14.

One mole of oxygen atoms contains 6.022 x 1023 atoms, and it weighs ___

a)

12 amu

b)

16 amu

c)

12 grams

d)

16 grams

15.

One mole of hydrogen weighs 1.008 g, a mole of iron weighs ___

a)

12.01 g

b)

16.00 g

c)

26 g

d)

55.85 g

16.

The mass, in grams, of one mole of a substance is known as its ___

a)

atomic mass unit

b)

molar mass

c)

relative atomic mass

d)

stoichiometric weight

17.

Our bodies use sucrose by combining it with oxygen to create energy plus ___

a)

C6H12O6 and H20

b)

O2 and H20

c)

CO2 and C6H12O6

d)

CO2 and H20

18.

When writing a reaction out as an equation the number of atoms of each element has to ___

a)

be larger on the reactant side

b)

be exactly the same on both sides

c)

be larger on the product side

d)

include the element carbon

19.

How many molecules of oxygen are required to burn one molecule of sucrose?

a)

1

b)

5

c)

11

d)

12

20.

In order to burn 5 grams of sugar, Hank calculated that he would need to inhale about ___

a)

5 breaths

b)

35 breaths

c)

350 breaths

d)

530 breaths