Question

Option C is the correct answer.How
please solve it

(i realy need answer)

Note#If you can not solve the question,then please dont answer it,,..Thankyou​

Answer 1

Answer:

..

Molar mass Cu = 63.55g/mol Molar mass CuO = 63.55+16 = 79.55Mass of Cu in 5g CuO = 5*63.55/79.55 = 3.994g Cu - call this 4g Cu % Cu in sample = 4/40*100 = 10%.

Answer 2

$\huge\boxed{\underline{\mathcal{\red{A}\green{N}\pink{S}\orange{W}\blue{E}\pink{R}}}}$