The molar mass of carbon dioxide, CO2, is
Correct answer: A. 44 g per mole
- A. 44 g per mole
- B. 28 g per mole
- C. 12 g per mole
- D. 32 g per mole
Explanation
Adding one carbon at 12 and two oxygens at 16 each gives 12 + 32, that is 44 g per mole. The value 28 belongs to carbon monoxide and 32 to oxygen gas, both of which appear here because they are the neighbouring molecules students confuse it with. Molar mass in grams per mole is numerically equal to relative molecular mass.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? support@testustad.com
About Moles and Avogadro's Number
The mole connects the microscopic number of particles with measurable mass, using Avogadro's number, 6.022 × 10²³ particles per mole. Questions involve molar mass, conversion between mass, moles and particles, percentage composition, empirical and molecular formulas, and distinguishing atoms, molecules, ions and formula units.
Practise Fundamental Concepts of Chemistry
894 free Fundamental Concepts of Chemistry MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Moles and Avogadro's Number questions
The percentage by mass of carbon in carbon dioxide, CO2, is about
A compound has the empirical formula CH2O and a relative molecular mass of 180. Its molecular formula is
The total number of atoms present in one mole of sulphuric acid, H2SO4, is
The relative atomic mass of an element is
The molarity of a solution is defined as the number of moles of solute dissolved in
Which of the following samples contains the greatest number of atoms?