what is the percent by mass of oxygen in carbon dioxide (co₂)? use %element = \\frac{total mass of element…

what is the percent by mass of oxygen in carbon dioxide (co₂)? use %element = \\frac{total mass of element in compound}{molar mass of compound}×100. 27.29% 57.12% 72.71% 79.99%

what is the percent by mass of oxygen in carbon dioxide (co₂)? use %element = \\frac{total mass of element in compound}{molar mass of compound}×100. 27.29% 57.12% 72.71% 79.99%

Answer

Explanation:

Step1: Find molar masses

The molar mass of carbon ($C$) is approximately $12.01\ g/mol$, and the molar mass of oxygen ($O$) is approximately $16.00\ g/mol$. For $CO_2$, the molar mass of the compound $M_{CO_2}=12.01 + 2\times16.00=12.01 + 32.00 = 44.01\ g/mol$. The total mass of oxygen in $CO_2$ is $m_O=2\times16.00 = 32.00\ g/mol$.

Step2: Calculate percent - by - mass of oxygen

Using the formula $%O=\frac{m_O}{M_{CO_2}}\times100=\frac{32.00}{44.01}\times100\approx72.71%$.

Answer:

$72.71%$