Question

Question #f4fbd

Answer 1

See below.

Explanation:

Since this question only gives you the mass of the atom in question, you don't know what the substance is and thus can't find a molar mass to convert the grams to moles.

So, since we have the mass of an individual atom we can simply convert `"0.27 g"` to `kg` and divide by the atom's mass.

Step 1: Convert from g to kg

`"0.27 g"*(("1 kilogram")/("1,000 grams"))="0.00027 kg"`

Step 2: Divide the total mass by the mass of one atom.

`0.00027/(1.5*10^(-26))=1.8*10^22 "atoms"`

Hope this helps!