Question

an oxygen atom has a mass of and a glass of water has a mass of . use this information to answer the question below. be sure your answers have the correct number of significant digits.

Answer 1

To find the mass in grams of 0.600 mol of oxygen atoms, multiply the number of moles by the molar mass of oxygen (16 g/mol) to get 9.60 g. For oxygen molecules (O₂), the mass is 0.600 mol multiplied by its molar mass (32 g/mol), resulting in 19.20 g.

Step-by-step explanation:

When determining the mass in grams of oxygen atoms and oxygen molecules, we use the given molar masses of each substance and utilize dimensional analysis to convert moles to grams.

1. 0.600 mol of oxygen atoms (O): Since the molar mass of oxygen is 16 g/mol, we multiply this by the number of moles.
   
2. 0.600 mol of oxygen molecules (O₂): The molar mass of an oxygen molecule is 32 g/mol (since each molecule has 2 atoms of oxygen).
   

These calculations ensure the correct number of significant digits based on the given information, by rounding to the nearest hundredth, and follow the rule of significant figures in multiplying.