Question

calculate the formula mass unite of
NH3
H2SO4
CaCI2​

Answer 1

Answer:

Formula mass unit is the sum of average atomic masses of each atom presented in the chemical formula.

Explanation:

1)NH3=14+3=17amu

2)H2SO4=2+32+(16×4)=2+32+64=98amu

3)CaCl2=40+(35.5×2)=40+71=111amu

Answer 2

Answer:

1 : NH3

Atomic mass of N+3+(atomic mass of hydrogen)

= 14+3

= 17u

2: H2SO4

= 1×2+36+16×4

= 2+32+64

= 98u

3: CaCl2

Atomic mass of Ca = 40

Atomic mass of Cl = 35.5(2)

Formula unit mass of cacl2 = 111u.