Question

What is the mass percent of oxygen (o) in so2

Answer 1

If you’re talking about percentage by mass, then

mass % of O2 in SO2= 
$\frac{32}{32 + 32} \times 100\% = 50\%$

Answer 2

Mass percent of oxygen in $SO_2$ is 49.94%.

Explanation:

• To calculate the mass percentage of the individual element in the substance, mass of the complete substance must be calculated.
• The elements present in $SO_2$ are sulphur and oxygen. The mass of sulphur is 32.07g/mol and oxygen is 15.99g/mol.

∴ Mass of $SO_2$ = 32.07 + (15.9994*2) = 32.07+31.998 = 64.07g/mol.

• Mass percentage of oxygen in $SO_2$ can be calculated using the formula:
• $Mass = \frac{Mass of the component}{Total mass of substance}\times 100$

$Mass = \frac{31.998}{64.07}\times 100 = 49.94$%.

Thus it can be inferred that Mass percent of oxygen in $SO_2$ is 49.94%

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