Question

Calculate themass of 0.75 moles of CaSO4 ( atomic mass; Ca = 40 u, S =32 u, O = 16 u)

Answer 1

mass of 1 mole of CaSo4 = 40 + 32 + 4×16

== 136 g .

so mass of 0.75 mole of CaSO4 = 136 × 0.75

== 102 g ...is the answer

Answer 2

Answer:

1 mole of CaSO4 is 136 ( 40+32+4(16)) gm

weight of 0.75 mole of CaSO4 is 136 ×0.75

136×3/4

by solving this we get 102

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