Question

How many moles are in 1.50 g of ethylamine, ch3ch2nh2?

Answer 1

Answer: 0.03 moles

Explanation:

To calculate the moles, we use the equation:

`\text{Number of moles}=\frac{\text{Given mass}}{\textMolar mass}}` ....(1)

For ethyl amine
`CH_3CH_2NH_2`

Mass of ethyl amine
`CH_3CH_2NH_2`= 1.50 g

Molar mass of ethyl amine
`CH_3CH_2NH_2`= 45 g/mol

Putting values in above equation, we get:

`\text{Moles of ethyl amine}=(1.50g)/(45g/mol)=0.03moles`

Answer 2

mass = mass/molar mass of ch3ch2nh2
the molar mass of CH3CH2NH2 = 12 +(1x3)+12+(1 x2)+14+(1x2) =45 g/mol

moles is therefore = 1.50g /45g/mol = 0.033 moles