# Counting Atoms: Question Preview (ID: 21551)

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**How many elements are in the molecule H2O?**

a) 1

b) 2

c) 3

d) 4

**How many atoms are in H2O?**

a) 1

b) 2

c) 3

d) 4

**How many atoms of Hydrogen are in C2H4O2?**

a) 2

b) 4

c) 8

d) 6

**How many elements are in C2H2O2**

a) 1

b) 2

c) 3

d) 4

**How many Lithium atoms are in Li2O4?**

a) 4

b) 6

c) 8

d) 2

**Which element has 4 atoms in BaO4H2?**

a) Ba

b) O

c) H

d) None

**How many Ca atoms are in Ca3(CO2)3?**

a) 1

b) 2

c) 3

d) 4

**How many C atoms are in Ca3(CO2)3?**

a) 1

b) 2

c) 3

d) 4

**How many O atoms are in Ca3(CO2)3?**

a) 2

b) 4

c) 6

d) 8

**How many Silver Atoms are in 2Ag2Cr2O7**

a) 2

b) 4

c) 6

d) 8

**How many Chromium atoms are in Ag2(Cr2O7)4**

a) 2

b) 4

c) 6

d) 8

**How many Oxygen atoms are in 2Ag2Cr2O7**

a) 10

b) 21

c) 14

d) 16

**How many Silver atoms are in Ag2Cr2O7**

a) 1

b) 2

c) 3

d) 4

**How many elements are in AlCl6K3?**

a) 1

b) 2

c) 3

d) 4

**How many atoms are in AlCl6K3?**

a) 6

b) 8

c) 10

d) 12

**Which element in not in the molecule AlCl6K3?**

a) Potassium

b) Aluminum

c) Chlorine

d) Iodine

**How many Aluminum atoms are in 3AlCl6K3**

a) 1

b) 2

c) 3

d) 4

**Which elements have the same number of atoms in AlCl6K3?**

a) Aluminum and Chlorine

b) Aluminum and Potassium

c) Chlorine and Potassium

d) None of them

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