Question

An oxygen atom has the mass of 2.66×10 to the -20/3 G and a glass of water has a mass of 0.050 kg. equation is in the picture

Answer 1

Answer:

The number of moles of oxygen atoms that have a mass equal to the mass of a glass of water = 3.1 moles

Explanations:

The mass of oxygen atom = The mass of glass water = 0.050kg

`\begin{gathered} \text{Mass of oxygen atom = 0.050 }*\text{ 1000g} \\ \text{Mass of oxygen atom = }50\text{ g} \end{gathered}`

Use the formula below to calculate the number of moles of oxygen atoms

`\text{Number of moles = }\frac{Mass\text{ in gram}}{\text{Molar mass}}`

Molar mass of oxygen = 16 g/mol

Mass of oxygen atom = 50g

Substitute these values into the formula above

`\begin{gathered} \text{Number of moles = }(50)/(16) \\ \text{Number of moles = }3.1\text{ moles} \end{gathered}`

The number of moles of oxygen atoms that have a mass equal to the mass of a glass of water = 3.1 moles