25.0 ml of 15% NH4NO3 solution is diluted to 300.0 ml. What is the concentration of the diluted solution?

.15% x 25=3.75ml
Do I divide by 300ml and that's my answer?

I disagree with 0.15%. It's 0.15 as a fraction or 15% as a percent but not both at the same time.

15% x 25/300 = ?% Or you can do
0.15 x 25/300 and convert that fraction to a % by x 100 = ?

Sorry I should haved deleted the percent sign. I know you drop it and add the decimal.

I got 1.25

That's my answer too but I think you should say the answer is 1.25%. By the way, it would be much better for everyone if you didn't change screen names. We can follow the thread better with the same name. It also helps on follow up questions to have the same screen name.

To find the concentration of the diluted solution, you need to calculate the amount of ammonium nitrate (NH4NO3) that is present in the 25.0 ml of the 15% NH4NO3 solution, and then divide it by the total volume of the diluted solution (300.0 ml).

First, calculate the amount of NH4NO3 in the 25.0 ml of the 15% solution by using the formula: amount = concentration x volume.

Amount of NH4NO3 in the 25.0 ml solution = 0.15 x 25.0 ml = 3.75 grams.

Next, divide the amount of NH4NO3 by the total volume of the diluted solution (300.0 ml):

Concentration of the diluted solution = Amount of NH4NO3 / Total volume of diluted solution = 3.75 grams / 300.0 ml.

However, before proceeding with the division, you need to ensure that the units are consistent. In this case, both the amount and volume should be expressed in the same units (either grams and grams or ml and ml).

If the amount of NH4NO3 is given in grams, then you can directly divide it by the volume in ml:

Concentration of the diluted solution = 3.75 grams / 300.0 ml.

If the amount of NH4NO3 is given in ml, then you need to convert it to grams using the density of the solution:

Density of the NH4NO3 solution = mass / volume.

If the density is not provided, you can assume the density of the solution to be equal to the density of water, which is approximately 1 g/ml.

Once you have the amount of NH4NO3 in grams, you can then divide it by the volume in ml to find the concentration of the diluted solution:

Concentration of the diluted solution = 3.75 grams / 300.0 ml.

By performing this calculation, you will get the concentration of the diluted solution.