Question

A chemist measures the amount of oxygen gas produced during an experiment. She finds that 4.87 g of oxygen gas is produced. Calculate the number of moles of oxygen gas produced. Be sure your answer has the correct number of significant digits.

Answer 1

0.152 moles

Step-by-step explanation:

Given that:

The mass of the oxygen gas produced = 4.87 g

Also, The molar mass of oxygen gas,
`O_2` =
`2* 16\ g/mol` = 32 g/mol

The formula for the calculation of moles is shown below:

`moles = (Mass\ taken)/(Molar\ mass)`

Thus,

`Moles= (4.87\ g)/(32\ g/mol)`

`Moles=0.152\ mol`

Both given values and the answer is in 3 significant digits.