Question

Calculate the formula unit masses of the following zno na2o k2co3

Answer 1

Answer:

ZnO: 81

Na2O: 62

K2CO3: 138

Explanation:

Zn Atomic mass is taken as 65g/mol

Oxygen (O) has Atomic mass if 16g/mol

Na has 23, K has 39, and Carbon Atomic mass is 12g/mol.

now, let's Calculate for ZnO

Zinc Oxide has one Zinc atom and one Oxygen,

Zinc Atomic mass is 65 & Oxygen has 16g/mol,

adding 65+16 will give, 81g/mol.

Similarly, Na2O has 2 Na atoms and one O atom,

Na has 23g/mol of atomic mass, and O has 16,

23*2+16

will be equal to 62g/mol

Similarly, for K2CO3,

here, two atoms of potassium, one Atom of carbon & 3 Oxygen Atoms are there,

adding,

2*39 + 12 + 3*16

you'll get, 138g/mol