Determine the mass fraction of a substance in a solution if we add 300 g of water to 35 g of salt.

The mass fraction of a substance in a solution is an indicator that indicates the ratio of the mass of a given substance to the mass of the entire solution. Find the mass of the entire solution:

1) 35 + 300 = 335 grams

Now we find the mass fraction of salt in the solution:

2) (35/335) * 100% = 10.447761194%

Reducing to hundredths, we get 10.45%

Answer: The mass fraction of salt in the solution is approximately equal to 10.45%