The mass of the salt substance is 15 g, the mass fraction of 30% is the mass of the salt solution.
| January 26, 2021 | education
Given:
m (salt) = 15 g.
w (salt) = 30%.
To find:
m (solution) -?
Decision:
w (soluble substance) = m (soluble substance): m (solution) * 100%.
In our case, the soluble substance is salt. From here we have:
m (solution) = m (salt): w (salt) = 15 g: 30% = 15 g: 0.3 = 50 g.
Answer: m (solution) = 50 g.
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