Let’s find the mass of the solution. To do this, add the masses of water and salt.
M solution = M water + M salt = 5 + 45 = 50 grams;
To find the mass fraction of salt, it is necessary to divide the mass of salt by the mass of the solution.
With salt = M salt / M solution = 5/50 = 0.1 = 10%;
Similarly, you can find the concentration of water:
With water = M water / M solution = 45/50 = 0.9 = 90%;
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