Moles and Formulae

Moles and Formulae

Multiple Choice

How many moles of phosphorus are there in 43.4g of the element?

• 1.6

• 1.4

• 1.5

• 0.7

Multiple Choice

How many moles of aspirin (C₉H₈O₄) are there in a tablet containing a 0.160g dose?

• 8.88x10^-4

• 1126

• 7.88x10^-4

• 06.88x10^-4

Multiple Choice

How many moles of iron oxide (Fe₂O₃) are there in 35.91 kg?

• 4.44x10^-3

• 5731

• 225

• 0.225

Multiple Choice

What is the mass of 6 moles of carbon?

• 0.5g

• 72.0g

• 2.0g

• 96.0g

Multiple Choice

What is the mass of 3.25 moles of potassium chloride?

• 242.5g

• 0.044g

• 369.5g

• 23.0g

Multiple Choice

What is the mass of 3 moles of magnesium sulfate (MgSO₄⋅7H2O)

• 1022g

• 415.2g

• 82.1g

• 739.2g

Multiple Choice

0.25 moles of atoms of a metal have a mass of 11.9g. What is the metal?

• lead

• copper

• ruthenium

• titanium

Multiple Choice

What is the Mr of a given compound that 11.5 moles has a mass of 369g?

• 4243.5

• 29.8

• 32.1

• 0.031

Multiple Choice

A carboxylic acid has the empirical formula CH₃(CH₂)_nCOOH. What is n given that 2.5 moles of the acid has a mass of 395g?

• 9

• 7

• 5

• 3