The total number of moles represented by 20 grams of CaCO3 (gram formula mass=100g/mol is: What is the unknown? moss gram formula mass moles

## Step 1: <br />Identify the given information. In this problem, we are given the mass of \(CaCO_3\) as 20 grams and the gram formula mass as 100 g/mol.<br /><br />## Step 2: <br />Understand the concept of a mole. A mole is a unit of measurement used in chemistry to express amounts of a chemical substance. It is defined as exactly \(6.02214076 \times 10^{23}\) entities (atoms, molecules, ions, etc.). <br /><br />## Step 3: <br />Use the formula to calculate the number of moles. The formula is:<br /><br />### \(\text{Moles} = \frac{\text{Mass (in grams)}}{\text{Gram formula mass (in g/mol)}}\)<br /><br />## Step 4: <br />Substitute the given values into the formula and calculate the number of moles.