Mass to Mole Conversion Challenges

This video tutorial explains how to convert between grams and moles of elements or compounds using molar mass as a conversion factor. It emphasizes the importance of this process in chemistry, as moles cannot be weighed directly. The tutorial covers the concept of molar mass, dimensional analysis, and provides examples of conversions involving copper, sodium chloride, and carbon. The video aims to help students understand the process of using molar mass for conversions and the significance of dimensional analysis in ensuring accurate unit conversions.

Why is it important to convert grams to moles in chemistry?

• To measure the volume of a substance

• To calculate the temperature of a reaction

• To determine the number of atoms or molecules involved in a reaction

• To find the density of a substance

What is the molar mass of carbon?

• 24 g/mol

• 180 g/mol

• 12 g/mol

• 6 g/mol

How can the molar mass of glucose be expressed?

• 1 g of glucose per mole

• 12 g of glucose per mole

• 58 g of glucose per mole

• 180 g of glucose per mole

What is the first step in dimensional analysis?

• Set up the math so units cancel

• Determine the quantity and units in the question

• Multiply the numerator values

• Divide the denominator values

If you have 10.13 grams of copper, how many moles of copper do you have?

• 63.5 moles

• 1.6 moles

• 6.35 moles

• 0.16 moles

What is the molar mass of copper?

• 63.5 g/mol

• 12 g/mol

• 180 g/mol

• 58 g/mol

How many grams of sodium chloride are equivalent to 2.4 moles?

• 58 grams

• 139.2 grams

• 180 grams

• 46.8 grams

What is the molar mass of sodium chloride?

• 180 g/mol

• 63.5 g/mol

• 58 g/mol

• 12 g/mol

How many grams of carbon are equivalent to 3.9 moles?

• 24 grams

• 12 grams

• 46.8 grams

• 58 grams

When converting from grams to moles, what mathematical operation is typically performed?

• Multiplying by the molar mass

• Subtracting the molar mass

• Adding the molar mass

• Dividing by the molar mass