A) \[~K{{C}_{2}}{{H}_{5}}{{O}_{4}}\]
B) \[{{K}_{3}}{{C}_{6}}{{H}_{5}}{{O}_{7}}\]
C) \[{{K}_{2}}CH{{O}_{3}}\]
D) \[{{K}_{6}}{{C}_{4}}{{H}_{5}}{{O}_{7}}\]
Correct Answer: B
Solution :
[b]| Element | %by mass | Atomic mass | Rel.no.of moles of element | Simplest molar ratio |
| K | 38.4 | 39.10 | \[\frac{38.4}{39.10}=0.982\] | \[\frac{0.982}{0.982}=1\] |
| O | 36.3 | 16.00 | \[\frac{36.3}{16.00}=2.27\] | \[\frac{2.27}{0.982}=2.3\] |
| C | 23.7 | 12.01 | \[\frac{23.7}{12.01}=1.97\] | \[\frac{1.97}{0.982}=2.00\] |
| H | 1.66 1 | 1.01 | \[\frac{1.66}{1.01}=1.64\] | \[\frac{1.64}{0.982}=1.67\] |
| Simple molar ratio | Fraction nearest decimal value | Nearest factor | Whole no. mole ratio |
| 1.00 mol K | 1 mol K | \[\times 3\] | 3 mol K |
| 2.31 mol O | 2 1/3 mol O | \[\times 3\] | 7 mol O |
| 2.01 mol C | 2 mol C | \[\times 3\] | 6 mol C |
| 1.67 mol 4 | 1 2/3 mol H | \[\times 3\] | 5 mol H |
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