A 1.582 g sample containing 71.47% calcium and 28.53% oxygen was used for an experiment.What is the equivalent mole of calcium from the sample?

Answer 1

To find the equivalent moles of calcium in the sample, we first need to determine the mass of calcium in the sample.

Mass of calcium = 1.582 g * 71.47% = 1.129 g

Next, we need to calculate the molar mass of calcium (Ca), which is approximately 40.08 g/mol.

Now, we can calculate the number of moles of calcium in the sample by dividing the mass of calcium by the molar mass of calcium:

Number of moles of calcium = 1.129 g / 40.08 g/mol ≈ 0.0282 mol

Therefore, the equivalent mole of calcium in the sample is approximately 0.0282 moles.