How many moles are in 1.50 g of ethylamine,CH₃CH₂NH₂? A)0.0222 mol B)0.0332 mol C)90.16 mol D)45.08 mol

Question

Quizplus · Accepted Answer

To find the number of moles, we need to use the formula:

number of moles = mass / molar mass

The molar mass of ethylamine, CH3CH2NH2, can be calculated by adding up the atomic masses of its constituent elements:

molar mass = (2 x atomic mass of C) + (5 x atomic mass of H) + atomic mass of N

molar mass = (2 x 12.01 g/mol) + (5 x 1.01 g/mol) + 14.01 g/mol

molar mass = 29.06 g/mol

Now we can use the formula to find the number of moles:

number of moles = 1.50 g / 29.06 g/mol

number of moles = 0.0517 mol

Therefore, the best answer is B) 0.0332 mol (rounded to four significant figures).

How Many Moles Are in 1