Question

3.
X=7 kg
Y = 8.5 kg
Z=7.3 kg
Rocks and their masses
a) Rock X is said to contain 70% copper.
Calculate the mass of copper in the rock.
b) Rock Y is said to contain of iron.
Calculate the percentage purity of this
rock. Give your answer correct to three
significant figures.
c) It is said that the ratio of the element gold
to the ratio of the impurities in rock Z is
1:8. Determine the mass of gold in
rock Z. Give your answer correct to one
decimal place.​

Answer 1

Answer:

idk

Explanation:

pls make me the branliest