Ammonium Sulfide Composition and Properties

The video tutorial explains how to calculate the percent composition by mass of ammonium sulfide (NH4_2S). It covers the calculation of the percent composition for each element: nitrogen, hydrogen, and sulfur. The process involves using the molar mass of each element, multiplying by the number of atoms, dividing by the molar mass of NH4_2S, and converting to a percentage. The tutorial provides a step-by-step guide for each element, ensuring the total adds up to approximately 100%.

What is the chemical formula for ammonium sulfide?

• (NH4)2S

• NH3S

• (NH3)2S

• NH4S2

How many nitrogen atoms are present in one formula unit of ammonium sulfide?

• 1

• 4

• 2

• 3

What is the molar mass of nitrogen used in the calculation?

• 14.01 g/mol

• 16.00 g/mol

• 12.01 g/mol

• 1.01 g/mol

What is the percent composition of nitrogen in ammonium sulfide?

• 50.00%

• 47.07%

• 41.13%

• 11.86%

How many hydrogen atoms are present in one formula unit of ammonium sulfide?

• 6

• 4

• 8

• 10

What is the percent composition of hydrogen in ammonium sulfide?

• 47.07%

• 11.86%

• 50.00%

• 41.13%

What is the molar mass of sulfur used in the calculation?

• 32.07 g/mol

• 16.00 g/mol

• 14.01 g/mol

• 1.01 g/mol

What is the percent composition of sulfur in ammonium sulfide?

• 47.07%

• 50.00%

• 11.86%

• 41.13%

What should the sum of the percent compositions of all elements in ammonium sulfide be close to?

• 100%

• 75%

• 50%

• 150%

Who is the presenter of the video tutorial?

• Dr. C

• Dr. B

• Dr. A

• Dr. D