Calculate the mass of potassium trioxocarbonate(iv) in 250cm3 of 0.100moldm-3 solution.(K2CO3=138gmol-1)
СM = n/V
n = CM x V = 0.100 x 0.250 = 0.025 mol
n = m/M
m = n x M = 0.025 x 138 = 3.45 g
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