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?

Question

2076 views around the world

You can reuse this answer
Creative Commons License

Answer 1 · 2017-07-03T22:11:52

30%

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# 5g#color(white)d# --- x

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

Percentage yield:

#"practical product"/"theoretical product"*100#

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