Question

A reaction produces .815 moles of H2O. How many molecules produces?

Answer 1

To find out the number of water molecules produced simply use Avogadro’s constant, where 1 mol of any compound is equal to 6.02 x 10^23 molecules of the substance.

Multiply 0.815 to this value.

Answer 2

The reaction produces 4.91 x 10²³ molecules of H₂O.

Step-by-step explanation:

Remember first the meaning of "mol". A mol always represents the amount of particles equal to 6.022 x 10²³, which is called Avogadro's number.

For example: If we have 1 mol of books that means that we have 6.022 x 10²³ books which is the same as 602200000000000000000000 books (a huge amount of books!)

Now, let's analyze the problem:

- H₂O is a molecule of water, and to know how many molecules are in 0.815 moles of water, it is necessary to use the Avogadro's number.

- To solve this problem we have to think about the relation between the Avogadro's number and the number of moles so we use the "Rule of three" thinking that: if 1 mole of water has 6.022 x 10²³ molecules of water, the 0.815 moles of water that we have, will be the result of multiplying 0.815 by 6.022 x 10²³ and dividing that result by one.

- After applying the Rule of three, we finf that the reaction produces 4.91 x 10²³ molecules of water.