Chemistry, asked by chetan1580, 10 months ago

calculate the relative molecular mass of

1) K2Cr2O7

2) (CH3COO)2 pb

{ ATOMIC MASS OF K=39; CR=52;O=16;C=12;H=1;Pb=207}.

Answers

Answered by isher200

2

Answer:

1.

3 9×2 + 52×2+16×7=78+104+112=294

2.

(12+1+12+16+16)^2+207

=57×2+207

=114+207

=321

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