Question

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Answer 1

Answer:

1 mole of HCN=1(1+12+14)=27grams

1 mole of Pb(NO3)2=1[(207+14+16×3)2]=331 grams

4.3 moles of CH4=4.3(12+4×1)=68.8

0.7 moles of Na2O=0.7(2×23+16)=36.4

0.015 moles of NaNO3=0.015(23+14+16×3)=1.265

0.24 moles of Na2CO3.10H2O=0.24[(23×2+12+16×3)+10(1×2+16)]

=0.24[(105)+10(18)]

=0.24[105+180]

=0.24(285)

=68.4