Mass of Zinc Chloride Calculation Fun!

How can we calculate the mass in grams of 4.45 x 10^-2 moles of zinc chloride (ZnCl2)?

A) 6.17 g

B) 0.25 g

C) 1.57 g

D) 0.63 g

Final answer:

The mass of 4.45 x 10^-2 moles of zinc chloride (ZnCl2) is closest to 6.17 grams.

Explanation:

The question asks for the mass in grams of 4.45 x 10^-2 moles of zinc chloride (ZnCl2). We can determine this using the molar mass of the molecule, which is 136.29 g/mol for ZnCl2. Thus, the mass is: moles * molar mass = 4.45 x 10^-2 moles * 136.29 g/mol = 6.062 g. The closest answer choice (rounded to two decimal places) is A) 6.17 g.

To determine the mass in grams of 4.45 x 10^-2 moles of zinc chloride (ZnCl2), we need to use the molar mass of ZnCl2.

The molar mass for ZnCl2 is calculated to be 176.124 g/mol.

Therefore, the mass of 4.45 x 10^-2 moles of ZnCl2 is approximately 6.17 g.