1. Какая масса растворённого вещества содержится в 21г. раствора с массовой долей 0,9% 2. Какой объём воды нужно прилить к 24г. соли, чтобы получить раствор с ω=23 %?
3. Какую массу соли нужно добавить к 85 мл. воды, чтобы получить раствор с ω = 17 %
4. Смешали 1,2г соли и 2,4мл воды. Какова массовая доля соли в полученном растворе?
5. К 36г 19% раствора соли прилили 21мл воды. Определите массовую долю соли.
6. К 85г 13%-ного раствора сахара прибавили 14г сахара. Каково процентное содержание сахара во вновь полученном растворе?
7. Сколько миллилитров воды надо прилить к 54 г 18%-ного раствора соли, чтобы получить 5%-ный раствор?

What were the success and failures that came to boyle’s excitements?

Flourine is found to undergo 10% radioactivity decay in 366 minutes determine its halflife

Nconcentration refers to the molar concentration of an ion in solution. it may be identical to, or greater or less than, the molar concentration of the compound containing the ion that was used to make the solution. for soluble salts, the molarity of a particular ion is equal to the molarity of that compound times the subscript for that ion. for example, 1 m of alcl3 is 1 m in al3+ and 3 m in cl−. 1 m of (nh4)2so4 is 2 m in nh4+ and 1 m in so42−. part a what is the concentration of k+ in 0.15 m of k2s? view available hint(s) nothing m m part b if cacl2 is dissolved in water, what can be said about the concentration of the ca2+ ion? view available hint(s) if is dissolved in water, what can be said about the concentration of the ion? it has the same concentration as the cl− ion. its concentration is half that of the cl− ion. its concentration is twice that of the cl− ion. its concentration is one-third that of the cl− ion. part c a scientist wants to make a solution of tribasic sodium phosphate, na3po4, for a laboratory experiment. how many grams of na3po4 will be needed to produce 550 ml of a solution that has a concentration of na+ ions of 0.700 m ? express your answer numerically in grams. view available hint(s) mass of na3po4 n a 3 p o 4 = nothing g provide feedback