What is the % of a solution containing 18.0g of NaCl in 65 ml of water
18.0/65 * 100 = 27%
Right? Wrong?
18/(18+65)
you are not doing for percent piece/whole
the whole includes the piece.
That's correct! The percent of a solution can be calculated by dividing the mass of the solute by the total mass of the solution, and then multiplying by 100. In this case, you have 18.0g of NaCl in 65 ml of water. To find the total mass of the solution, you need to consider both the mass of NaCl and the mass of water.
First, convert the volume of water from milliliters (ml) to grams (g). You can do this by using the density of water, which is 1 g/ml. Therefore, 65 ml of water is equal to 65 g. Now, we can calculate the total mass of the solution by adding the mass of NaCl (18.0g) and the mass of water (65g), which is 83g in total.
Next, divide the mass of NaCl (18.0g) by the total mass of the solution (83g) and multiply by 100 to find the percent:
(18.0g / 83g) * 100 = 21.69%
So, the correct answer is that the solution containing 18.0g of NaCl in 65 ml of water is approximately 21.69%.