Prepared 300 g of 5% salt solution in water. Calculate the weight in grams of water.

m solution = 300 g.

W = 5%.

Let’s determine the mass of water. We write down the solution.

First, let’s determine the mass of salt. We use the following formula.

W = m r.v / m r-ra * 100%.

m r.v = m solution * W / 100%.

m (salt) = 300 * 5/100 = 15 g of salt.

This means that the mass of salt is 15 g.

Next, we determine the mass of water. To do this, we calculate as follows:

m solution = m salt + m H2O.

m salt = m solution – m H2O.

m salt = 300 g – 15 g = 285 g.

This means that the mass of water is 285 g.

Answer: the mass of water is 285 grams.