Mass ratio of $C$ : $O$ in $C O_{2}$ molecule is

\frac{3}{4}

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\frac{8}{3}

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\frac{3}{8}

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\frac{4}{3}

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Solution

The correct option is C $\frac{3}{8}$
Mass of carbon in $C O_{2} = 12 g$
Mass of oxygen in $C O_{2}$ = $2 \times 16 = 32 g$

Ratio of $C$ : $O = 12 : 32 = 3 : 8$

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Question 2.28

Calculate the mass percentage of aspirin $(C_{9} H_{8} O_{4})$ in acetonitrile $(C H_{3} C N)$ when 6.5g of $C_{9} H_{8} O_{4}$ is dissolved in 450 g of $C H_{3} C N$

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Mass ratio of C:O in CO2 molecule is

The correct option is C 38Mass of carbon in CO2=12 gMass of oxygen in CO2 = 2×16=32 g Ratio of C:O=12:32=3:8

Mass ratio of $C$ : $O$ in $C O_{2}$ molecule is

The correct option is C $\frac{3}{8}$
Mass of carbon in $C O_{2} = 12 g$
Mass of oxygen in $C O_{2}$ = $2 \times 16 = 32 g$

Ratio of $C$ : $O = 12 : 32 = 3 : 8$