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Counting Atoms day 1

Total questions: 10

Worksheet time: 5mins

Name
Class
Date
1.

1) 2Al₂SO₄

a)

Al = 2, S = 1, O = 4

b)

Al = 4, S = 2, O = 8

c)

Al = 2, S = 2, O = 4

d)

Al = 4, S = 1, O = 4

2.

2) 3Na₂CO₃

a)

Na = 2, C = 1, O = 3

b)

Na = 6, C = 1, O = 9

c)

Na = 6, C = 3, O = 9

d)

Na = 3, C = 2, O = 9

3.

2MgSO₄

a)

Mg = 1, S = 1, O = 4

b)

Mg = 2, S = 2, O = 8

c)

Mg = 2, S = 1, O = 4

d)

Mg = 4, S = 2, O = 8

4.

4Ca₃PO₄

a)

Ca = 3, P = 1, O = 4

b)

Ca = 12, P = 4, O = 16

c)

Ca = 4, P = 3, O = 16

d)

Ca = 12, P = 1, O = 4

5.

2K₂Cr₂O₇

a)

K = 2, Cr = 2, O = 7

b)

K = 4, Cr = 4, O = 14

c)

K = 4, Cr = 2, O = 7

d)

K = 2, Cr = 4, O = 14

6.

3Fe₂O₃

a)

Fe = 2, O = 3

b)

Fe = 3, O = 6

c)

Fe = 6, O = 9

d)

Fe = 9, O = 6

7.

2H₂SO₄

a)

H = 2, S = 1, O = 4

b)

H = 4, S = 2, O = 8

c)

H = 4, S = 1, O = 4

d)

H = 2, S = 2, O = 8

8.

5NaNO₃

a)

Na = 5, N = 5, O = 15

b)

Na = 1, N = 1, O = 3

c)

Na = 5, N = 1, O = 15

d)

Na = 10, N = 5, O = 15

9.

3CuSO₄

a)

Cu = 3, S = 3, O = 12

b)

Cu = 1, S = 1, O = 4

c)

Cu = 3, S = 1, O = 4

d)

Cu = 6, S = 3, O = 12

10.

4N₂O₅

a)

N = 2, O = 5

b)

N = 8, O = 20

c)

N = 4, O = 10

d)

N = 10, O = 8