Final answer:
There are approximately 0.1895 moles in 7.6 grams of calcium, calculated using the molar mass of calcium (40.08 g/mol) and the mass-to-mole conversion formula.
Step-by-step explanation:
To calculate the number of moles in 7.6 g of calcium (Ca), we will use the molar mass of calcium and the formula for converting between mass and moles. First, we identify the molar mass of calcium from the periodic table, which is approximately 40.08 g/mol. Then, using the formula:
number of moles = mass (g) / molar mass (g/mol)
We can determine the moles of calcium as follows:
number of moles of Ca = 7.6 g Ca / 40.08 g/mol Ca = 0.1895 moles of Ca
Therefore, there are approximately 0.1895 moles in 7.6 grams of calcium.