# Counting Atoms Question Preview (ID: 40281)

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Practice Counting Atoms To Find Out If An Equation Is Balanced.

**How many atoms of Hydrogen are present in 5H20?**

a) 5

b) 2

c) 10

d) 7

**How many atoms of Carbon are present in 3C2H12N6?**

a) 3

b) 6

c) 2

d) 12

**How many atoms of Oxygen are present in H2O?**

a) 0

b) 1

c) 2

d) 3

**How many atoms of Calcium are present 2NaCl?**

a) 1

b) 2

c) 3

d) 4

**How many atoms of Nitrogen are present in 2NH3?**

a) 3

b) 6

c) 2

d) 1

**How many atoms of Hydrogen are present in 2H2O + H3**

a) 2

b) 4

c) 7

d) 10

**How many different elements are there present in the compound NH4CO3?**

a) 2

b) 9

c) 4

d) 1

**How many atoms of Hydrogen are present in H2SO4?**

a) 4

b) 1

c) 2

d) 6

**How many elemetnts are present H2SO4?**

a) 3

b) 2

c) 1

d) 4

**Does this follow the Law of conservation of mass? Ag2O ------- Ag + O2?**

a) Yes

b) No

c)

d)

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