Question

Determine a massa em gramas correspondente a 1.25.10²² moleculas C2H2?

Answer 1

MM=2.12+2.1

MM=24+2

MM=26g/mol

26g------------6×10^23

x----------------1,25×10^22

x=26*1,25×10^22/6×10^23

x=32,5×10^22/6×10^23

x=5,41×10^-1

x=0,541g