Question

a) find molicular formila : C=12 / H= 7 / O= 16
b) calculate the number of mole of NaSO4- sodium sulfate 50m2 of solution of concentration 0.25m/l deduce the mass of sodium sulfate in 50ml of solution'
Given: Na: 23
S: 32
O:16

Answer 1

Answer on Question #53043 – Chemistry – General chemistry

Question

a) find molecular formula: C=12 / H= 7 / O= 16

b) calculate the number of mole of NaSO4- sodium sulfate 50m2 of solution of concentration 0.25m/l deduce the mass of sodium sulfate in 50ml of solution'

Given: Na: 23

S: 32

O:16

Answer:

a) C₁₂H₇O₁₆

b) n (Na₂SO₄) = C·V = 0.25(mol/L)·0.05(L) = 0.0125 mol

m(Na₂SO₄) = n·M = 0.0125(mol)·142(g/mol) = 1.775 g

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