Question

25.0 g n₂o₅
express your answer in moles to three significant figures.
view available hint(s)
n = mol

Explanation:

Step1: Calculate molar mass of N₂O₅

The molar mass of N is 14.01 g/mol and of O is 16.00 g/mol. For N₂O₅, molar mass $M=(2\times14.01 + 5\times16.00)$ g/mol$=108.02$ g/mol.

Step2: Use the formula $n=\frac{m}{M}$

Given $m = 25.0$ g and $M=108.02$ g/mol, then $n=\frac{25.0}{108.02}$ mol$\approx0.231$ mol.

Answer:

0.231 mol