Question

Convert 8.5 grams of Cu(OH)2 to particles.

Answer 1

molar mass of Cu(OH)2 is 97.561 means 1 mole of Cu(OH)2 mass is 97.561

so 1gm of Cu(OH)2 have 1/97.561 mole

by unitary method no of moles in Cu(OH)2 is

8.5*1/97.561=0.087 moles

1 mole of Cu(OH)2 has 6.23*10^23 no of molecules of Cu(OH)2

so 0.087 has 0.087*6*10^23=0.522*10^23 or 5.22*10^22(in scientific notation)

Explanation:i hope it helps btw i am from india