wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

parts of chemical formulas, calculating molar mass & naming

Total questions: 40

Worksheet time: 1hrs 19mins

Name
Class
Date
1.
How many Sodium (Na) are in 6NaCl?
a)
1
b)
12
c)
6
2.
How many Magnesium are in 10MgCl2?
a)
10
b)
5
c)
20
3.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
4.
Number of N in (NH₄)₂CrO₄
a)
1
b)
2
c)
8
d)
16
5.
Number of H in 3(NH₄)₂CrO₄
a)
4
b)
2
c)
8
d)
24
6.
How many atoms are there TOTAL in:
H2SO4
a)
6
b)
5
c)
7
d)
3
7.
How many atoms of aluminum are on each side of the following equation: 4Al + 3O2 --> 2Al2 O3
a)
2
b)
6
c)
1
d)
4
8.
How many Oxygen atoms are in Al₂(SO₄)₃
a)
4
b)
12
c)
7
d)
24
9.
A subscript is the small number below a(n) ________ that tells the number of _______ of that element.
a)
element symbol; atoms
b)
atom; element symbol
c)
subscript; protons
d)
compound; elements
10.
What is the definition of molar mass?
a)
number of grams per one mole of a substance
b)
whole number ratio that is a multiple of a chemical formula
c)
simplest, whole number ratio of a chemical formula
d)
6.02 x 10^23 particles per one mole of a substance
11.
Molar mass is in units of ________.
a)
grams
b)
grams/mole
c)
mole
d)
moles/gram
12.
What is the molar mass of AuCl3?
a)
96 g
b)
130 g
c)
232.5 g
d)
303.3 g
13.
What is the definition for Avogadro's number?
a)
number of grams per one mole of a substance
b)
whole number ratio that is a multiple of a chemical formula
c)
simplest, whole number ratio of a chemical formula
d)
6.02 x 10^23 particles per one mole of a substance
14.
Which would have more atoms?
a)
1 mole of Li
b)
1 mole of Au
c)
1 mole of Si
d)
None, all are equal
15.
Which represents the greatest mass of sulfur?
a)
1 gram of sulfur
b)
1 molecule of sulfur
c)
0.5 mole of sulfur
d)
6.02 x 1023 atoms of sulfur
16.
What is the numerical value of Avogadro's number?
a)
60.22x1023
b)
6.022x1023
c)
6.022x1032
d)
6.022x1024
17.
How many atoms are found in 1 mol of Xenon atoms?
a)
6.022x1023
b)
3.011x1023
c)
1.204x1024
d)
6.022x1024
18.
What is the molar mass of sodium?
a)
11
b)
22.990
c)
45.98
d)
3
19.
What is the mass of one mole of aluminum?
a)
26.982 g
b)
13 g
c)
53.985 g
d)
14 g
20.

What is the molar mass of table salt? The chemical formula is NaCl?

a)

116.886 g/mol

b)

35.453 g/mol

c)

22.990 g/mol

d)

58.443 g/mol

21.
What is the molar mass of NaOH?
a)
39.997 g/mol
b)
38.989 g/mol
c)
23.998 g/mol
d)
57.004 g/mol
22.

What is the molar mass of boron in this chemical formula? B2(CO3)3

a)

21.622 g/mol

b)

64.866 g/mol

c)

38.822 g/mol

d)

201.648 g/mol

23.

What is the molar mass of PbSO4

a)

303.262 g/mol

b)

294.732 g/mol

c)

255.265 g/mol

d)

372.539 g/mol

24.

What is the molar mass of Zn(C2H3O2)2

a)

136.445 g/mol

b)

142.945 g/mol

c)

361.596 g/mol

d)

183.478 g/mol

25.

When writing the chemical formula of a compound that contains more than one of a particular polyatomic ion, _____ must be used.

a)

ionic charges

b)

parenthesis

c)

Greek prefixes

d)

lower case letters.

26.

When naming compounds that contain a nonmetal bonded to a nonmetal, _____ must be used.

a)

parenthesis

b)

Greek prefixes

c)

ionic charges

d)

Lewis structures

27.

All binary compounds end with_____.

a)

-ous

b)

-ate

c)

-ide

d)

-ite

28.

What is the correct formula for Ammonium phosphate?

a)

NH4PO4

b)

NH43PO4

c)

(NH4)3PO4

d)

NH4(PO4)3

29.

What is the correct formula for aluminum sulfide?

a)

Al3S2

b)

Al2S

c)

AlS2

d)

Al2S3

30.

What is the correct chemical formula for strontium acetate?

a)

SrC2H3O2

b)

Sr2C2H3O2

c)

Sr(C2H3O2)2

d)

Sr(C2H3O2)3

31.

How many atoms of oxygen are in a molecule of Ca3(PO4)2

a)

1

b)

2

c)

4

d)

8

32.
What is the formula for nitric acid?
a)
HNO2
b)
HNO3
c)
HNO4
d)
H2NO3
33.
Name HF
a)
hydrofluoric acid
b)
Hypofluoric acid
c)
hydrogen fluorine acid
d)
fluoric acid
34.
A mole of Neon contains
6.02 x 1023 _____.
a)
atoms
b)
formula units
c)
ions
d)
molecules
35.
Calculating percent composition determines the ___________ of each atom in a compound
a)
percent by mass
b)
percent by volume
c)
percent by number
36.
The molar mass of an element is the mass of one ____ of the element.
a)
atom
b)
molecule
c)
mole
d)
gram
37.
What is the molar mass of one molecule of Nitrogen N2?
a)
14.01 amu
b)
14.01 g
c)
28.02 g
d)
28.02 amu
38.
Find the percent composition of N2S2.
a)
N: 69.6%  S: 30.4%
b)
N:36% S: 75.6%
c)
N: 96.6% S: 3.4%
d)
N: 30.4% S: 69.6%
39.
Which of the following would have the highest number of moles?
a)
4g CO2
b)
15g H2O
c)
22g NaCl
d)
100g AgCl
40.
How many moles are in 16.94g of water?
a)
16.94
b)
0.9403
c)
305.2
d)
1.063

Similar Resources on Wayground

UKK KIMIA

40 questions

UKK KIMIA

quiz

Worksheet

•

11th Grade

Edexcel iGCSE Extracting metals and Structure and bonding

45 questions

Edexcel iGCSE Extracting metals and Structure and bonding

quiz

Worksheet

•

9th - 11th Grade

alkane,alkene,alkynes

37 questions

alkane,alkene,alkynes

quiz

Worksheet

•

10th Grade

KIMIA T4 : IKATAN KIMIA

35 questions

KIMIA T4 : IKATAN KIMIA

quiz

Worksheet

•

12th Grade

HÓA 10 CUỐI KÌ 2

35 questions

HÓA 10 CUỐI KÌ 2

quiz

Worksheet

•

9th - 12th Grade

NATURAL SCIENCE TEST: All about food

40 questions

NATURAL SCIENCE TEST: All about food

quiz

Worksheet

•

3rd - 12th Grade

Kiểm tra KL kiềm, kiềm thổ, nhôm

40 questions

Kiểm tra KL kiềm, kiềm thổ, nhôm

quiz

Worksheet

•

12th Grade

สอบแก้เคมีไฟฟ้า

36 questions

สอบแก้เคมีไฟฟ้า

quiz

Worksheet

•

11th Grade