Question

what is the mass of 10.0 mol ch₂o₂? lets begin by setting up our expression. which number choice goes in the green box? 10.0 mol ch₂o₂ ? hint: watch your units! 46.0 g ch₂o₂ 1 mol ch₂o₂ 6.02 x 10²³ molecules ch₂o₂

Explanation:

Step1: Calculate molar mass of \(CH_2O_2\)

Molar mass of \(C = 12.0\ g/mol\), \(H=1.0\ g/mol\), \(O = 16.0\ g/mol\).
Molar mass of \(CH_2O_2=12.0+(2\times1.0)+(2\times16.0)=46.0\ g/mol\).

Step2: Use dimensional analysis

To convert moles to grams, we use the conversion factor \(\frac{46.0\ g\ CH_2O_2}{1\ mol\ CH_2O_2}\).
In the given set - up \(10.0\ mol\ CH_2O_2\times\frac{[ ]}{[ ]}\), the numerator of the conversion factor should be the mass (to get the unit of mass in the final answer).

Answer:

\(46.0\ g\ CH_2O_2\)