Question

1. Calculate the formula unit mass of CaCl2 and Na2O​

Answer 1

Answer:

Formula mass of CaCl₂ = mass of Ca + 2(mass of Cl)

= 40 + 2(35.5)

= 40 + 71

= 111 u

Formula mass of Na₂O = 2(mass of Na) + mass of O

= 2(23) + 16

= 46 + 16

= 52 u

Answer 2

${\bold{\huge{\underline{\tt{\red{ANSWER:}}}}}}$

$CaCl_2 \\Ca= 40Cl = 35.5\\ = 40 + 35.5\times2 \\ = 75.5g$

$Na_2O \\ Na= 14 \\ O =15 \\ 14 + 15 \times 2 \\ =44g$