How Is The Molar Mass Of A Substance Determined?

Reviewed by Editorial Team
The ProProfs editorial team is comprised of experienced subject matter experts. They've collectively created over 10,000 quizzes and lessons, serving over 100 million users. Our team includes in-house content moderators and subject matter experts, as well as a global network of rigorously trained contributors. All adhere to our comprehensive editorial guidelines, ensuring the delivery of high-quality content.
Learn about Our Editorial Process
| By Kwchiro
K
Kwchiro
Community Contributor
Quizzes Created: 40 | Total Attempts: 411,750
| Attempts: 719 | Questions: 5
Quiz Flashcard
Please wait...
Question 1 / 5
0 %
0/100
Score 0/100
1. What is the molar mass of Carbon?

Explanation

The molar mass of a substance is determined by the average atomic mass according to the periodic table. The molar mass of carbon is 12.01 g/mol

Submit
Please wait...
About This Quiz
Chemistry Quizzes & Trivia

The molar mass is the mass of all the atoms in a molecule in grams per mole. The molar mass M is a physical property defined as the... see moremass of a given substance divided by the amount of substance. Do you understand how the molar mass of a substance is determined? Take this test and find out. see less

2. What is the molar mass of CH4 (methane)?

Explanation

The molar mass of a substance is determined by the average atomic mass according to the periodic table. There is 1 carbon in CH4 (methane) and 4 hydrogen:
Carbon 1 (12.01) + Hydrogen 4(1.01) = 16.05 g/mol

Submit
3. What is the molar mass of (NH4)2CO3 (Ammonium carbonate)?

Explanation

Molar mass is the mass of one mole of the substance. The molar mass of a substance is determined by the average atomic mass according to the periodic table. CAUTION: The parentheses indicates that everything within the parentheses is MULTIPLIED by the subscript outside of the parentheses. This means there are 2 nitrogen, 8 hydrogen (4 x 2), 1 carbon and 3 oxygen in this compound.
Nitrogen 2(14.01) + Hydrogen 8 (1.01) + Carbon 1 (12.01) + Oxygen 3(16.00) = 96.11 g/mol

Submit
4. What is the molecular mass of Cu3(PO4)2?

Explanation

Molar mass is the mass of ONE mole of a substance regardless of how many moles there are in the equation. CAUTION: The parentheses indicates that everything within the parentheses is MULTIPLIED by the subscript outside of the parentheses.
This means there are 3 Coppers, 2 Phosphorus, 8 oxygen:
Copper 3 (63.55) + Phosphorus 2(30.97) + 8 (16.00) = 380.59 g/mol

Submit
5. What is the molecular mass of Aluminum nitrate Al(NO3)3 from this equation: 2Al(s)   + 3Fe(NO3)2(aq)   à 3Fe(s)  + 2Al(NO3)3(aq)  

Explanation

(s) means solid and (aq) means aqueous.
Molar mass is the mass of ONE mole of a substance regardless of how many moles there are in the equation. So, ignore the “2” in front of Al(NO3)3
CAUTION: The parentheses indicates that everything within the parentheses is MULTIPLIED by the subscript outside of the parentheses.
This means there is 1 Aluminum, 3 Nitrogen, 9 oxygen (3 x 3)
The molar mass of a substance is determined by the average atomic mass according to the periodic table.
Aluminum 1 (26.98) + Nitrogen 3 (14.01) + Oxygen 9 (16.00) = 213.01 g/mol

Submit
View My Results

Quiz Review Timeline (Updated): Mar 22, 2023 +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jul 30, 2010
    Quiz Created by
    Kwchiro
Cancel
  • All
    All (5)
  • Unanswered
    Unanswered ()
  • Answered
    Answered ()
What is the molar mass of Carbon?
What is the molar mass of CH4 (methane)?
What is the molar mass of (NH4)2CO3 (Ammonium carbonate)?
What is the molecular mass of Cu3(PO4)2?
What is the molecular mass of Aluminum nitrate Al(NO3)3 from this...
Alert!

Advertisement