# Problem: Consider a sample of calcium carbonate in the form of a cube measuring 2.505 in. on each edge.If the sample has a density of 2.72 g/cm3 , how many oxygen atoms does it contain?

###### FREE Expert Solution

We are asked to determine the number of oxygen (O) atoms present in a sample of calcium carbonate (CaCO3) which is measuring 2.505 in on each edge and has a density of 2.72 g/cm3.

We shall follow these steps to solve this problem:

Step 1: Determine the volume of the sample in cm3.

Step 2: Multiply the obtained mass of CaCO3 with the density and then the molar mass of CaCO3.

Step 3: Perform a mole-to-mole comparison between O and CaCO3 (3 mol O: 1 mol CaCO3).

Step 4: Multiply the obtained moles of O with the Avogadro's number (6.02×1023 atoms/mol) and get the number of O atoms present.

85% (138 ratings) ###### Problem Details

Consider a sample of calcium carbonate in the form of a cube measuring 2.505 in. on each edge.

If the sample has a density of 2.72 g/cm3 , how many oxygen atoms does it contain?