In a solution where 5 grams are dissolved in 250 ml, what is the concentration in grams per liter?

To find the concentration in grams per liter, you first need to convert the volume of the solution from milliliters to liters. Since there are 1000 milliliters in a liter, 250 milliliters is equal to 0.25 liters.

Next, you calculate the concentration by dividing the amount of solute (in grams) by the volume of the solution (in liters). In this case, you have 5 grams of solute dissolved in 0.25 liters of solution:

Concentration = mass of solute (g) / volume of solution (L) = 5 g / 0.25 L.

When you perform the calculation, you get:

5 g ÷ 0.25 L = 20 g/L.

Now, to express this concentration in grams per liter, multiply 20 g/L by 1, which maintains the same value because you're not changing the amount.

Therefore, the correct concentration of the solution is 20 grams per liter (g/L), which corresponds to the provided correct answer, demonstrating your understanding of the concept of concentration and unit conversion.