Concentrations in Moles per Decimeter Cubed: Understanding Molar Concentration and Converting Between Units in mol/dm3

What is the unit of concentration when mass is divided by volume in the context of the given example?

• Moles per liter

• Grams per decimeter cubed

• Grams per liter

• Moles per decimeter cubed

Why is the concept of moles more useful than mass in chemical reactions?

• Moles are a smaller unit than grams

• Moles are easier to measure

• Moles relate to the number of molecules involved in reactions

• Moles are used only in physical reactions

How do you calculate the number of moles from the mass of a compound?

• Add the mass to the molecular mass

• Divide the mass by the molecular mass

• Multiply the mass by the molecular mass

• Subtract the molecular mass from the mass

What is the molar concentration if 0.3 moles of a substance is dissolved in 2 decimeters cubed of water?

• 0.6 moles per decimeter cubed

• 3 moles per decimeter cubed

• 0.15 moles per decimeter cubed

• 1.5 moles per decimeter cubed

If you know the molar concentration and the volume, what can you calculate?

• The mass of the solution

• The number of moles

• The density of the solution

• The temperature of the solution

How do you convert grams per decimeter cubed to moles per decimeter cubed?

• Add the molecular mass

• Divide by the molecular mass

• Subtract the molecular mass

• Multiply by the molecular mass

What is the molar concentration of a solution with 400 grams per decimeter cubed and a molecular mass of 40 grams per mole?

• 20 moles per decimeter cubed

• 5 moles per decimeter cubed

• 10 moles per decimeter cubed

• 15 moles per decimeter cubed