Question

How many moles are there in 0.0500 g of N₂ gas (M=28.0 g/mol)?

a) 1.79 × 10⁻³ mol
b) 2.50 × 10⁻³ mol
c) 1.43 × 10⁻³ mol
d) 3.57 × 10⁻³ mol

Answer 1

There are 1.79 × 10⁻³ moles of N₂ gas in 0.0500 g, calculated using the molar mass of N₂ and the given mass.

Step-by-step explanation:

To calculate the number of moles in 0.0500 g of N₂ gas, we use the formula:

moles = mass (g) / molar mass (g/mol)

Given that the molar mass of N₂ is 28.0 g/mol, we can substitute the values into the equation:

moles = 0.0500 g / 28.0 g/mol

By doing the calculation, we get:

moles = 1.79 × 10⁻³ mol

Therefore, there are 1.79 × 10⁻³ moles of N₂ gas in 0.0500 g.