Question

How many molecules are in 4.00 mol H2O?

A.2.41 x 1024 molecules
B.6.02 x 1023 molecules
C.1.51 x 1023 molecules
D.7.20 x 1024 molecules

Answer 1

The number of molecules in 4.00 mol of H2O is 2.41 x 10^24 molecules.

Step-by-step explanation:

To determine the number of molecules in 4.00 mol of H2O, we can use Avogadro's number, which is approximately 6.022 × 1023. Avogadro's number represents the number of particles (atoms or molecules) per mole of a substance. Since there are three atoms in each water molecule, we can calculate the number of molecules in 4.00 mol of H2O by multiplying 4.00 mol by Avogadro's number:

4.00 mol H2O × 6.022 × 1023 molecules/mol = 2.41 × 1024 molecules of H2O.

Answer 2

The number of molecules in 4.00 mol H₂O is 2.41 × 10²⁴ molecules (Option A).

How can the number of molecules be calculated?

A molecule is a collection of two or more atoms bound together by chemical bonds; depending on the context, ions that meet this requirement may or may not be included in the phrase.

Given;

4.00 mol of H₂O

Avogadro's number= 6.02 × 10²³ particles per mole.

The total number of molecules=

4.00 mol H₂O × (6.02 ×
`10 ^(23)` molecules/mol)

= 2.41 × 10²⁴ molecules.

Therefore, the correct answer is A. 2.41 ×
`10^(24)` molecules.