To calculate the desired mass fraction of salt in the specified solution, we apply the formula: ωс = mс / mр * 100%.
These tasks: mс – the mass of the salt obtained (mс = 3 g); mр is the initial mass of the solution (mр = 45 g).
Let’s make a calculation: ωs = mc / mr * 100% = 3/45 * 100% ≈ 6.67%.
Answer: The mass fraction of salt in the specified solution should have been 6.67%.
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