What is the mass, in grams, of 1.50 mol of iron (iii) sulfate? express your answer using three significant figures. mm = nothing g request answer part b how many moles of ammonium ions are in 6.935 g of ammonium carbonate? express your answer using four significant figures. nn = nothing mol request answer part c what is the mass, in grams, of 1.20×1021 molecules of aspirin, c9h8o4? express your answer using three significant figures. mm = nothing g request answer part d what is the molar mass of diazepam (valium®) if 0.05570 mol weighs 15.86 g? express your answer using four significant figures. mm = nothing g/mol

For A: The mass of iron (III) sulfate is 600. g

For B: The moles of ammonium carbonate is 0.07216 moles

For C: The mass of given number of molecules of aspirin is 0.359 grams.

For D: The molar mass of diazepam is 284.7 g/mol

Explanation:

To calculate the number of moles, we use the equation:

     .....(1)

We are given:

Number of moles of iron (III) sulfate = 1.50 mol

Molar mass of iron (III) sulfate = 399.9 g/mol

Putting values in equation 1, we get:

Hence, the mass of iron (III) sulfate is 600. g

We are given:

Mass of ammonium carbonate = 6.935 g

Molar mass of ammonium carbonate = 96.1 g/mol

Putting values in equation 1, we get:

Hence, the moles of ammonium carbonate is 0.07216 moles

We are given:

Number of aspirin molecules =

Mass of 1 mole of aspirin = 180.16 g/mol

According to mole concept:

number of molecules occupies 1 mole

So, number of molecules of aspirin has a mass of 180.16 grams

Thus, number of molecules of aspirin will have a mass of

Hence, the mass of given number of molecules of aspirin is 0.359 grams.

We are given:

Moles of diazepam = 0.05570 mol

Given mass of diazepam = 15.86 g

Putting values in equation 1, we get:

Hence, the molar mass of diazepam is 284.7 g/mol