how many moles do 10.0 mg of co represent?\n0.0036\n0.000357\n0.28\n0.036

Explanation:

Step1: Calculate molar - mass of CO

The molar mass of C is approximately 12.01 g/mol and of O is approximately 16.00 g/mol. So, the molar mass of CO, $M = 12.01+16.00=28.01$ g/mol.

Step2: Convert mass to grams

Given mass $m = 10.0$ mg. Since 1 g = 1000 mg, then $m=10.0\times10^{- 3}$ g.

Step3: Use the mole - formula

The number of moles $n=\frac{m}{M}$. Substitute $m = 10.0\times10^{-3}$ g and $M = 28.01$ g/mol into the formula: $n=\frac{10.0\times10^{-3}\text{ g}}{28.01\text{ g/mol}}\approx0.000357$ mol.

Answer:

0.000357