Question

What is the percent composition of copper in copper (II) hydroxide (Cu(OH)2 )? Question 7 options: a) 65.13 % Cu b) 32.80 % Cu c) 97.57 % Cu d) 2.07 % Cu

Answer 1

The answer to your question is letter a. 65.13%

Step-by-step explanation:

Percent composition of Copper in Cu(OH)₂

Process

1.- Calculate the molecular weight of Copper hydroxide

Cu(OH)₂ = 64 + (16 x 2) + (2 x 1)

= 64 + 32 + 2

= 98 g

2.- Solve the problem using proportions

98 g of Cu(OH)₂ --------------- 100 %

64 g of Cu ---------------- x

x = (64 x 100) / 98

x = 6400 / 98

x = 65.2 %