3 Calculating Molar Mass

Last updated 4 months ago

10 questions

Note from the author:

Instructions

Required

3 Calculating Molar Mass

Last updated 4 months ago

10 questions

Note from the author:

Big Ideas
In this lesson we will learn how to find the molar mass of an element or compound!
The molar mass tells you the mass of one mole of a substance.
For pure, monatomic elements, the molar mass is equal to the relative atomic mass.
For compounds, the molar mass can be calculated by adding up the relative atomic masses of each of the atoms in the compound.
In the periodic table, the relative atomic mass is the small number at the bottom of the element square.
Tips
If there is a subscript in a compound indicating that there are multiple atoms of a given element, don't forget to multiply the relative atomic mass of that element by that number!

Instructions

Big Ideas
In this lesson we will learn how to find the molar mass of an element or compound!
The molar mass tells you the mass of one mole of a substance.
For pure, monatomic elements, the molar mass is equal to the relative atomic mass.
For compounds, the molar mass can be calculated by adding up the relative atomic masses of each of the atoms in the compound.
In the periodic table, the relative atomic mass is the small number at the bottom of the element square.
Tips
If there is a subscript in a compound indicating that there are multiple atoms of a given element, don't forget to multiply the relative atomic mass of that element by that number!

As a reminder, use the image to identify the atomic mass for an element.

Please round your answer to the nearest whole number (no decimals) & include units (g/mol).

Required

Manganese has the symbol Mn. What is the molar mass of manganese?

Required

Tungsten has the symbol W. What is the molar mass of tungsten?

Required

Diatomic hydrogen has the formula, H2. What is the molar mass of H2?

Required

Diatomic chlorine has the formula, Cl2. What is the molar mass of Cl2?

Required

Ammonia has the formula, NH3. What is the molar mass of NH3?

Required

Cycloheptane has the formula, C7H14. What is the molar mass of C7H14?

Required

Aluminum bromide has the formula, AlBr3. What is the molar mass of AlBr3?

Required

Rubidium oxide has the formula, Rb2O. What is the molar mass of Rb2O?

Required

Strontium phosphide has the formula, Sr3P2. What is the molar mass of Sr3P2?

Required

3 Calculating Molar Mass

3 Calculating Molar Mass

Big Ideas

Tips

Big Ideas

Tips

Manganese has the symbol Mn. What is the molar mass of manganese?

Tungsten has the symbol W. What is the molar mass of tungsten?

Diatomic hydrogen has the formula, H2. What is the molar mass of H2?

Diatomic chlorine has the formula, Cl2. What is the molar mass of Cl2?

Ammonia has the formula, NH3. What is the molar mass of NH3?

Cycloheptane has the formula, C7H14. What is the molar mass of C7H14?

Aluminum bromide has the formula, AlBr3. What is the molar mass of AlBr3?

Rubidium oxide has the formula, Rb2O. What is the molar mass of Rb2O?

Strontium phosphide has the formula, Sr3P2. What is the molar mass of Sr3P2?

Cesium chloride has the formula, CsCl. What is the molar mass of CsCl?

Big Ideas

Tips

Big Ideas

Tips

Manganese has the symbol Mn. What is the molar mass of manganese?

Tungsten has the symbol W. What is the molar mass of tungsten?

Diatomic hydrogen has the formula, H2. What is the molar mass of H2?

Diatomic chlorine has the formula, Cl2. What is the molar mass of Cl2?

Ammonia has the formula, NH3. What is the molar mass of NH3?

Cycloheptane has the formula, C7H14. What is the molar mass of C7H14?

Aluminum bromide has the formula, AlBr3. What is the molar mass of AlBr3?

Rubidium oxide has the formula, Rb2O. What is the molar mass of Rb2O?

Strontium phosphide has the formula, Sr3P2. What is the molar mass of Sr3P2?

Cesium chloride has the formula, CsCl. What is the molar mass of CsCl?