Question

Какова массовая доля раствора, если для его приготовления взяли 5г вещества и 45г воды

Answer 1

Дано:

m(раствора)-45г

m(р.р)-5г

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Найти:

w-?

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Решение:

1)m(раствора)=45+5=50г

2)w=5/50×100%=10%

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Ответ:w=10%

Answer 2

Calculating the Mass Fraction of a Solution

To calculate the mass fraction of a solution, you can use the formula:

Mass Fraction = (Mass of Solute / Total Mass of Solution) × 100%

Given: - Mass of solute (substance): 5g - Mass of solvent (water): 45g

Calculation

Using the formula, we can calculate the mass fraction of the solution:

Mass Fraction = (5g / (5g + 45g)) × 100%

Mass Fraction = (5g / 50g) × 100%

Mass Fraction = 0.1 × 100%

Mass Fraction = 10%

So, the mass fraction of the solution is 10%.