You wish to make a 0.283 m hydrobromic acid solution from a stock solution of 12.0 m hydrobromic acid. how much concentrated acid must you add to obtain a total volume of 75.0 ml of the dilute solution

1.77 mL

Explanation:

To solve this problem we going to use the following equation:

[1] X v1 = [2] X v2

Where:

[1] = will be the higher concentration, the stock solution.

[ 2 ] = will be the concentration that you want to obtain.

v1 = the volume you have to take from the stock solution

v2 = the volume of the solution you will prepare

Replacing the data on the equation:

[1] = 12 M

[2] = 0.283 M

v1 = ? , that's the volume you want to find.

v2= 75 mL

Using the equation:

12 M x v1 = 0.283 M x 75 mL

v1 = (0.283x75) / 12

v1 = 1.77 mL

answer : a model is often used to explain and make things easier to understand when any scientific topic needs to be demonstrated and explained.

as in this case where a scientist wants to use a model to present the results of his detailed scientific investigation. he should do it as it will him to make the audience understand the concept in a much better way. also, it can be changed according to new scientific understandings.

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying