Can someone please solve this three questions for me. Thank you for your help. (1)- in an experiment, 5g of copper was heated with excess sulphur yield 3g of copper (1)sulphide. what is the percentage yield?

1 Answer

30%

Explanation:

Mass: S= 32g , Cu= 63.5g ... Cu_2S=127g

practical product = 3g of Cu_2S

2Cu + S -> Cu_2S

63.5g --- 127g
color(white)d 5gcolor(white)d --- x

"127 * 5"/63.5 = 10g --> theoretical product

Percentage yield:

"practical product"/"theoretical product"*100

"3g"/"10g"*100=30%