Question

question 5

how many moles are there in 82.5 grams of iron?

none of these
55.85
0.677
1.48
4.97 x 10^{25}

Explanation:

⚡ Using what you learned: mole-to-mass and mole-to-particle conversions

Step 1: Identify the molar mass of iron

$$ \text{Molar mass of Fe} \approx 55.85\text{ g/mol} $$

Step 2: Convert mass to moles

$$ \text{Moles of Fe} = \frac{82.5\text{ g}}{55.85\text{ g/mol}} \approx 1.477\text{ mol} $$

Rounding to three significant figures:

$$ 1.48\text{ mol} $$

Answer:

1.48