Question

How many moles of N are in 0.217 g of N2O:

A) 0.005 moles
B) 0.010 moles
C) 0.015 moles
D) 0.020 moles

Answer 1

To determine the number of moles of N in 0.217 g of N2O, calculate the molar mass of N2O and use the formula moles = mass/molar mass. The correct answer is A) 0.005 moles.

Step-by-step explanation:

To determine the number of moles of N in 0.217 g of N2O, we need to calculate the molar mass of N2O. The molar mass of N2O is the sum of the atomic masses of N (14.01 g/mol) and O (16.00 g/mol), multiplied by 2 because there are 2 nitrogen atoms in N2O. So, the molar mass of N2O is 14.01 g/mol + 16.00 g/mol + 16.00 g/mol = 46.01 g/mol.

Next, we can calculate the number of moles of N using the formula: moles = mass/molar mass. Therefore, the number of moles of N in 0.217 g of N2O is 0.217 g / 46.01 g/mol = 0.0047 mol.

Therefore, the correct answer is A) 0.005 moles.