Question

What is the mass, in grams, of 6.11 mol of sulfur trioxide?

Answer 1

Answer : The mass of sulfur trioxide is, 488.8 grams.

Explanation : Given,

Moles of sulfur trioxide = 6.11 mole

Molar mass of sulfur trioxide = 80 g/mole

Formula used :

$\text{Mass of }SO_3=\text{Moles of }SO_3\times \text{Molar mass of }SO_3$

Now put all the given values in this formula, we get the mass of sulfur trioxide.

$\text{Mass of }SO_3=6.11mole\times 80g/mole=488.8g$

Therefore, the mass of sulfur trioxide is, 488.8 grams.

Answer 2

It would be approximately 489 g, rounded for significant figures. The calculator given answer would be 489.20326. To get that, all you have to do is take your 6.11 moles and multiply it by 80.066 (the molar mass) divided by 1 mol to cancel out the unit.