A. 0.490g
B. 0.049g
C. 0.245g
D. 0.0245g
Correct Answer: Option A
Explanation
500cm³=0.005moldm−³
1000cm³=0.005500×1000cm³=0.010moldm‾³
Molar concentration = mass (in gdm‾³) / molarmass (in gmol‾¹)
0.01moldm‾³ = mass in gdm−398.0gmol−1
(Molar mass of H2SO4 = (2×1) + 32 + (16×4) = 98)
mass in gdm−3 = 0.980/gdm−3
1000cm3=0.980g
500cm3=0.980 x 500/1000=0.490g
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