Question

Calculate the molar mass of the following:

1. HCI
2. ZnF2
3. K2CO3
4. FePO4
5. Cu2s
Show all your work please thank you

Answer 1

1. 36.5g 2. 103.3g

3. 140g 4. 151g

5. 159g

Step-by-step explanation:

1. HCl

atomic mass of H= 1g

atomic mass of Cl = 35.5g

solution:

HCl

= 1+ 35.5

= 36.5g

2. ZnF2

atomic mass of Zn = 65.3g

atomic mass of F = 19g

solution:

ZnF2

= 65.3 + 2(19)

=65.3 + 38

= 103.3 g

3. K2CO3

atomic mass of K= 40g

atomic mass of C = 12g

atomic mass of O = 16g

Solution:

K2CO3

= 2(40) + 12 + 3 (16)

= 80 + 12 + 48

= 140g

4. FePO4

atomic mass of Fe = 56g

atomic mass of P= 31 g

atomic mass of O = 16g

solution:

FePO4

= 56 + 31 + 4 (16)

= 56 + 31 + 64

= 151g

5. Cu2S

atomic mass of Cu = 63.5g

atomic mass of S = 32 g

solution

Cu2S

= 2(63.5 )+ 32

= 127 + 32

=159g