How many moles are in 2.4g of carbon dioxide (CO2)? 0.05 mols CO2
Can someone show me how to show my work?

Explanation:

To convert form grams to moles, the molar mass must be used. This is the mass (in grams) in 1 mole of a substance.

We can use the values on the Periodic Table. First, find the molar masses of the individual elements: carbon and oxygen.

Check for subscripts. The subscript of 2 after O means there are 2 oxygen atoms, so we have to multiply oxygen's molar mass by 2 before adding.

Use the molar mass as a ratio.

Multiply by the given number of grams.

Flip the fraction so the grams of carbon dioxide cancel.

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

The ten thousandth place has a 5, so we round the 4 to a 5.

2.4 grams of carbon dioxide is about 0.055 moles.

i believe the answer is a.

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