Question

A sample of impure cuprite Cu2o
contains 66.6 % by mass Copper
The % of pure cu20 by
mass of cu20 will be​

Answer 1

Answer:

Number of moles of Cu in 66.6g=

63.5

66.6g

=1.05 moles

We have 1 mole of oxygen per 2 mole of Cu

So, moles of oxygen is 0.525.

Weight of oxygen present= 0.525mol×16g/mol=8.4g

So, we have (66.6+8.4)g=75g

Our sample is 75% pure Cu

2

O.

Explanation:

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