Convert mass to moles for both reactants. (round to 2 significant figures.)

Chemistry

2 answers:

Maslowich3 years ago

4 0

Answer:

Explanation:

Given parameters:

Mass of CuCl₂ = 2.50g

Mass of Al = 0.50g

Unknown:

Number of moles of CuCl₂ and Al = ?

Solution:

To solve this problem, we must understand that the number of moles is a fundamental property used in stoichiometry calculations.

Number of moles = $\frac{mass}{molar mass}$

Molar mass of CuCl₂ = 63.6 + 2(35.5) = 134.5g/mole

Molar mass of Al = 26.98g/mole

Number of moles of CuCl₂ = $\frac{2.5}{134.5}$ = 0.019moles

Number of moles of Al = $\frac{0.5}{26.98}$ = 0.019moles

a_sh-v [17]3 years ago

4 0

Answer:

2.50g CuCl2 equals 0.019 moles

0.25g Al equals 0.0093 or .0093 moles

Explanation:

Edge2020

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