Answer to Question #145533 in General Chemistry for Katie

Question

Ammonia (NH3) is commonly used in household cleaners. If there were 9.54 × 10^23 molecules of NH3, what was the mass of ammonia in grams?

Answer 1

To get our mass ,we need to find number of moles Ammonia has first

To calculate that,we use the formula

mole =no of molecules/avocados constant

Mole=9.54×10^23/6.02×10^23

=1.58moles

To get our mass,we will use

Mole=mass/molar mass

Therefore making mass the subject of the formula,we have

Mass=mole×molar mass

Molar mass of ammonia=17

Mass=1.58×17

Mass of NH3=26.86g