Question

calculeaza masa de apa si numarul de moli de apa ce se obtin prin reactia de ardere a 8 g hidrogen

Answer 1

MH₂=2AH=2*1=2g/mol

MH₂O=2AH+AO=2*1+16=18g/mol

mH₂=8g

n=m/M=8/2=4 moli H₂

H₂ + 1/2O₂ ⇒ H₂O

1 mol H₂...................1 mol H₂O
4 moli H₂..................x=4 moli H₂O

n=m/M=>m=n*M=4*18 =