A sample of aluminium has a mass of 6.3g, calculate the number of moles of aluminium present
divide 6.3 by the atomic weight of Al.
To calculate the number of moles of aluminum present, you need to use the molar mass of aluminum.
The molar mass of aluminum (Al) is 26.98 g/mol.
Now, let's use the formula to calculate the number of moles:
Number of moles of aluminum = Mass of aluminum / Molar mass of aluminum
Plugging in the values:
Number of moles of aluminum = 6.3 g / 26.98 g/mol
Calculating this:
Number of moles of aluminum ≈ 0.233 moles
Therefore, the number of moles of aluminum present in the sample is approximately 0.233 moles.
To calculate the number of moles of aluminum present, you can use the formula:
moles = mass / molar mass
First, you need to find the molar mass of aluminum. The molar mass represents the mass of one mole of a substance and is given in grams per mole (g/mol). The molar mass of aluminum is 26.98 g/mol.
Now, plug the values into the formula:
moles = 6.3 g / 26.98 g/mol
Divide the mass of the sample (6.3 g) by the molar mass of aluminum (26.98 g/mol):
moles ≈ 0.2335 mol
Therefore, there are approximately 0.2335 moles of aluminum present in the sample.