IL Calculate the relative formula masses of the following compounds 1. Cotis 2. NaCl 3. H2SO4 4. KNO3 5. K₂CO₃ 6. NaHCO 7. H₂CO₃ 8. Caso 9. ZnCl2 10. NHANO
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(a) Ethyne (C
2
H
2
) = 2×Mass of C atom+2×Mass of H atom=2×12+2×1=24+2=26 g/mol
(b) Sulphur dioxide (S
8
)=8×Mass of sulphur atom=8×32=256 g/mol
(c) P
4
=4×Mass of P atom=4×31=124 g/mol
(d) HCl=1×Mass of H atom+1×Mass of Cl atom=1+35.5=36.5 g/mol
(e) HNO
3
=1×Mass of H atom+1×Mass of N atom+3×Mass of O atom
=1×1+1×14+3×16=63 g/mol
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