Question

1 type the correct answer in the box. sarah measures out 151 grams of so₂. how many moles is this? express your answer to three significant figures. 151 grams of so₂ is equal to \\(\boxed{}\\) moles. reset next

Explanation:

Step1: Calculate molar mass of SO₂

Molar mass of S = 32.07 g/mol, molar mass of O = 16.00 g/mol.
$$M_{\text{SO}_2} = 32.07 + 2\times16.00 = 64.07\ \text{g/mol}$$

Step2: Calculate moles of SO₂

Use formula $n=\frac{m}{M}$, where $m=151\ \text{g}$, $M=64.07\ \text{g/mol}$.
$$n = \frac{151}{64.07} \approx 2.357$$

Step3: Round to 3 significant figures

Round 2.357 to 3 significant digits.
$$n \approx 2.36$$

Answer:

2.36