chemical calculation (2)
2007-03-21 1:54 pm
Solution X has a density of 2.42gcm^-3 and contain 55% of X by mass. What s the conc. of X in the solution? (molar mass of X= 106g mol^-1)
回答 (1)
2007-03-21 4:32 pm
✔ 最佳答案
Let there is 1 cm^3 of solution X.So, mass of solution X = 2.42 g
Mass of X = 2.42 X 55% = 1.331 g
Number of mole of X
= Mass / Molar mass
= 1.331 / 106
= 0.01256 mol
Therefore, concentration of X in the solution
= No. of mole / volume
= 0.01256 / (1/1000)
= 12.6 M (mol dm^-3)
參考: Myself~~~
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