Question

What is the mass of 3.50 mol of Zn atoms?A. 18.7gB. 229gC. 0.0535g

Answer 1

The molar mass of zinc (Zn) is approximately 65.38 g/mol.

To find the mass of 3.50 mol of Zn atoms, we can use dimensional analysis as follows:

3.50 mol Zn x 65.38 g Zn/mol = 228.93 g

Therefore, the mass of 3.50 mol of Zn atoms is approximately 228.93 g.

So, the closest answer choice is (B) 229g.

Answer 2

B. 229 g

Step-by-step explanation:

In order to calculate the mass of an amount of substance given its number of moles, we have to use the following formula:

`\boxed{\mathrm{mass = no. \ of \ moles * molar \ mass}}`.

We know that the molar mass (
`M_r`) of zinc is 65.4 g/mol, and the question tells us that 3.50 mol of Zn is present. Therefore, using the formula above, we get:

mass = 3.50 mol × 65 g/mol

= 228.9 g

`\approx` 229 g

Therefore, the mass of 3.5 mol of Zn is 229 g.