Question

Question: Approximately how many molecules of H₂Oare in one spoonful of water, assuming that the spoon holds about 18 mL?

Short answer

Answer

The molecules H₂O that are in one spoonful of water is $6.022\times {10}^{23}$.

Step-by-step solution

Definition of Concept

Molecules: Compound molecules contain atoms from two or more different elements.Water (H2O), for example, has three atoms: two hydrogen (H) atoms and one oxygen (O) atom.

Find the number of molecules

$$\begin{gathered} Considerthegiveninformation:Thedensityofwateris\frac{gram}{militer} \\ Theofwaterisequalto18grams.So,thegivenmassis18grams. \\ MolecularMassof{H}_{2}o(16+2)\times 118grams/mole \\ NumberofMoles\frac{Givenmass}{Molecularmass} \\ Usingthisformulatocalculatethenumberofmolecules \\ :NumberofMolecules\times AvagardoNumber \\ 1\times 6.022\times {10}^{23} \\ 6.022\times {10}^{23} \\ Therefore,moleculesof{H}_{2}othatareinonespoonfulofwateris6.022\times {10}^{23}. \end{gathered}$$