Question

How many molecules are in 1.2 moles of H20?​

Answer 1

To calculate the number of water molecules in 1.2 moles of H2O, multiply 1.2 by Avogadro's number (6.022 × 10^23), resulting in approximately 7.226 × 10^23 molecules.

Step-by-step explanation:

The question asks how many molecules are in 1.2 moles of H2O (water). To find this, we use Avogadro's number, which states that one mole of any substance contains 6.022 × 1023 units of that substance. For water molecules, we have:

1 mole H2O = 6.022 × 1023 molecules H2O

Therefore, to find the number of molecules in 1.2 moles of H2O, we multiply 1.2 by Avogadro's number:

1.2 moles H2O × (6.022 × 1023 molecules/mol) = 7.226 × 1023 molecules

Answer 2

7.226 × 10^23 molecules.

Step-by-step explanation:

• A compound is a substance that is made by two or more atoms from different elements.

• A mole of a compound contains a number of molecules equivalent to Avogadro's number, 6.022 × 10^23.
• That is, one mole of a compound contains 6.022 × 10^23 molecules.

In this case we are given;

Number of moles of H₂O as 1.2 moles

But, 1 mole of H₂O contains 6.022 × 10^23 molecules.

We are required to calculate the number of molecules present;

• To calculate the number of molecules we are going to multiply the number of molecules in one mole by the number of moles.

• Therefore;

Number of molecules = 1.2 moles × 6.022 × 10^23 molecules/mole

= 7.226 × 10^23 molecules.

Thus, 1.2 moles of water contains 7.226 × 10^23 molecules.