Question

with calculationCalculate the molecular mass of Al2O3 . 2H2O

Answer 1

Answer:

138g

Explanation:

mass of Al = 2(27) = 54g

mass of O = 3(16) = 48g

mass of H2O = 2(2+16) = 36g

total molecular mass = 138g

Answer 2

Answer:

Element Symbol Atomic weight # Mass percent

Aluminum Al 26.9815386 2 39.1060

Oxygen O 15.9994 5 57.9723

Hydrogen H 1.00794 4 2.9217