Moles contained in 50g mgcl2

Question

How many are contained in 50g mgcl2

Answer 1

If so, you can calculate the number of moles using the formula:

Moles Mass (g) Molar Mass (g/mol)

First, we need the molar mass of MgCl2, which is:

• Mg: 24.305 g/mol

• CI: 35.453 g/mol (and there are two chlorine atoms)

So, the molar mass of MgCl2 is:

Molar mass of MgCl2= 24.305+2x35.453 95.211 g/mol

Now, calculate the moles in 50 grams of MgCl2: Moles of MgCl2 is 50 g 95.211 g/mol ≈ 0.525 mol

So, there are moles of MgCl2 is 0.525 in 50 grams.

Answer 2

Molar molecular mass of MgCl2 : M = 24.3 + 2x35.5 = 95.3 g/mol.

We know: n = m/M = 50/95.3 = 0.5246 mol = 0.52 mol with 2 sig. fig.

Note: If we use the Molar molecular mass M = 95.211 g/mol, we have n = 0.52515 mol = 0.53 mol with 2 sig. fig.