How many moles of KBr are present in 1000 ml of a 0.02 M KBr solution? 1. .00002
2. 20
3. 50000
4. .02
5. 50​

4. .02

Explanation:

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In this case, since the molarity of a solution is defined as the moles of the solute divided by the volume of the solution, we can see we are given the molarity and volume and are asked to compute moles; thus, we can solve as shown below:

Whereas the volume must be in liters (1 L in this case); in such a way we can plug in the volume and molarity to obtain:

Therefore, the answer is 4. .02 .

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b. acid is the correct answer @jayxboof all social media

acid : acids are those which accepts an electron-pairs.

base : bases are those which donates ab electron-pairs.

alkali : it is a base that dissolves in water. it is basically a base and the ph greater than 7.

hydroxide ion : it is a poly-atomic ion which is negatively charged.

i think it is d. e because the next one is igneous.