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16 days ago

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

Chemistry

2 answers:

Anarel [2.6K]16 days ago

4 0

Answer:

Explanation:

Given parameters:

Mass of CuCl₂ = 2.50g

Mass of Al = 0.50g

Unknown:

Moles of CuCl₂ and Al =?

Solution:

To resolve this issue, one must first grasp that moles are a fundamental aspect in stoichiometric math.

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

The molar mass of CuCl₂ is 63.6 + 2(35.5) = 134.5 g/mole

and for Al is 26.98 g/mole

Therefore, the number of moles of CuCl₂ = $\frac{2.5}{134.5}$ = 0.019 moles

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

Anarel [2.6K]16 days ago

4 0

Answer:

2.50g CuCl2 equals 0.019 moles

0.25g Al equals 0.0093 or 0.0093 moles

Explanation:

Edge2020

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