Question

calculate the relative molecular masses of:[C=12, H=1, Cl=35.5, O=16, Na=23, K=39,N=14]

A)Potassium Chlorate

B) Ammonium Carbonate​

Answer 1

Explanation:

Relative molecular mass of CHCI3

= 12 + 1 + (3 x 35.5)

= 12 + 1 + 106.5

= 119.5 2.

Relative molecular mass of (NH4)2 Cr207

=(14 x 2)+(1x8)+(52 x 2)+(16x 7)

= 28 + 8 + 104 + 112 = 252

Relative molecular mass of CuSO4. 5H20

= 63.5 + 32 + (16 x 4) + 5(2 + 16)

= 159.5 + 90

= 249.5 4.

Relative molecular mass of )(NH4)2SO4

=(2 x 14)+(8x 1)+32 +(4 x 16)

=28+8+32+64

= 132

Relative molecular mass of CH3COONa

=(12 x 2)+(1x3)+(16 x 2)+23

=24+3+32+23

= 82

Potassium chlorate (KClO3) =39.1+35.5+16 x 3

= 39.1+ 35.5 + 48

= 122.6

Ammonium chloroplatinate (NH4)2PtC16

=(14 x 2)+(1 x8)+195.08+(35.5 x 6)

= 28+ 8 +195.08 + 213

= 444.08