convert mass to moles for both reactants. (round to 2 significant figures.) 2.50 g cucl2 equals moles 0.50 g…

Explanation:

Step1: Determine molar mass of CuCl₂

The molar mass of Cu (copper) is approximately 63.55 g/mol and Cl (chlorine) is approximately 35.45 g/mol. For CuCl₂, molar - mass (M_{CuCl_2}=63.55 + 2\times35.45=63.55 + 70.9 = 134.45) g/mol.

Step2: Calculate moles of CuCl₂

Use the formula (n=\frac{m}{M}), where (n) is the number of moles, (m) is the mass, and (M) is the molar mass. Given (m = 2.50) g and (M = 134.45) g/mol, then (n_{CuCl_2}=\frac{2.50}{134.45}\approx0.0186\approx0.019) moles.

Step3: Determine molar mass of Al

The molar mass of Al (aluminum) is approximately 26.98 g/mol.

Step4: Calculate moles of Al

Using the formula (n=\frac{m}{M}), with (m = 0.50) g and (M = 26.98) g/mol, then (n_{Al}=\frac{0.50}{26.98}\approx0.0185\approx0.019) moles.

Answer:

2.50 g CuCl₂ equals 0.019 moles 0.50 g Al equals 0.019 moles