Finding Molar Mass: Key Concepts and Practice

This video tutorial by Mrs. Ban explains the concept of molar mass, which is the ratio of mass to the amount of substance, measured in grams per mole. It covers how to calculate the molar mass of simple elements and compounds using the periodic table. The tutorial includes step-by-step examples and practice problems to help students understand the process of determining molar mass for various compounds, including those with subscripts and parentheses. The video aims to enhance students' skills in using the periodic table for accurate molar mass calculations.

What is the unit of molar mass?

• grams per liter

• liters per mole

• grams per mole

• moles per gram

Where can you find the atomic mass of an element?

• Side of the periodic table

• Middle of the periodic table

• Bottom of the element's square in the periodic table

• Top of the periodic table

What is the molar mass of carbon when rounded?

• 12

• 16

• 14

• 10

How many atoms of sodium (Na) are considered in the example given?

• 2

• 1

• 3

• 4

What is the molar mass of the compound Na2CO3?

• 100.0 g/mol

• 110.0 g/mol

• 106.0 g/mol

• 120.0 g/mol

How many nitrogen atoms are in the compound Ca(NO3)2?

• 3

• 2

• 1

• 4

What is the molar mass of Ca(NO3)2?

• 170.1 g/mol

• 164.1 g/mol

• 150.1 g/mol

• 160.1 g/mol

How many oxygen atoms are in Fe2O3?

• 4

• 3

• 2

• 5

What is the molar mass of Fe2O3?

• 170.3 g/mol

• 160.3 g/mol

• 159.3 g/mol

• 150.3 g/mol

What is the molar mass of Pb(Cr2O7)2?

• 640.2 g/mol

• 639.2 g/mol

• 630.2 g/mol

• 650.2 g/mol