Which of the following has least mass? 1)3.01 × 10²³ atoms of C 2)8 gram of hydrogen 3)2.5 mole of Na 4)1 mole of S

8 gram of Hydrogen

You have to work out the mass of each answers option so for

1. from atoms to mass you have to work with avagadros number (6.23x10^23) and then with the molar mass of the Carbon.

2. Already in grams so do not need to do anything

3. From mole to mass, just take the moles and multiply it by the molar mass

4. Do the same as 3 as they are both in moles

the answer is c) abandoned properties that are contaminated with hazardous materials.