Question

Calculate the formula unit masses of ZnO, Na2O, K2CO3, given atomic masses of Zn = 65u, Na = 23u, K = 39 u, C =3 12 u, and O = 16 u.​

Answer 1

Answer:

Explanation:

Formula unit mass of ZnO=(Atomic mass of Zn)+(Atomic mass of O)

                                            =(65+16)u =81u

Formula unit mass of Na  

2

​  

O=(2×23)+16

                                             =62u

Formula unit mass of K  

2

​  

CO  

3

​  

=(2×39)+12+(3×16)

                                                 =138u

Answer 2

Calculate the formula unit masses of ZnO,Na

2

O,K

2

CO

3

.

(atomic masses of Zn=65u,Na=23u,K=39u,C=12u and O=16u)

Answer

Formula unit mass of ZnO=(Atomic mass of Zn)+(Atomic mass of O)

=(65+16)u =81u

Formula unit mass of Na

2

O=(2×23)+16

=62u

Formula unit mass of K

2

CO

3

=(2×39)+12+(3×16)

=138u

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