How many moles are in a 4.5g of Sulfur?

Explanation:

To convert from grams to moles we must use the molar mass. This can be found on the Periodic Table.

We can use this number as a ratio or fraction.

Multiply by the given number of grams: 4.5

Flip the fraction so the grams of sulfur cancel.

The original measurement of grams had 2 significant figures, so our answer must have the same. For the number we calculated, that is the hundredth place.

The 0 in the thousandth place tells us to leave the 4.

There is about 0.14 moles of sulfur in 4.5 grams.

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