What mass of CO2 will be produced when 50 g of CaCO3 decomposes?

CaCO3 decomposition:

CaCO3 -> CaO + CO2

The first thing to do here is to calculate the relative formula mass of CaCO3 and CO2.

RFM of CaCO3 = 40 g + 12 g + (16 g x 3) = 100 g

RFM of CO2 = 12 g + (16 g x 2) = 44 g

The decomposition equation shows 1 CaCO3 goes to 1 CaO and 1 CO2.

We have 50 g of CaCO3, effectively we have half a CaCO3.

50 g / 100 g = 0.5

In order to get the mass of CO2 we need to times the RFM of CO2 by 0.5 (or divide by 2) because of the ratio of CaCO3 to CO2:

44 g x 0.5 = 22 g

22 g of CO2 are obtained from decomposition of 50 g of CaCO3.

Joshua H. GCSE Chemistry tutor, A Level Chemistry tutor, IB Chemistry...

1 year ago

Answered by Joshua, a GCSE Chemistry tutor with MyTutor

Still stuck? Get one-to-one help from a personally interviewed subject specialist


£20 /hr

Teresa B.

Degree: Anatomy (Bachelors) - Glasgow University

Subjects offered:Chemistry, Spanish+ 3 more

-Personal Statements-

“Since the dawn of time, I've been talking to people about things I love and enjoy. How cliché, I know. But don't roll your eyes at me yet. Hear me out: ...”

£18 /hr

Amelia C.

Degree: Chemistry (Masters) - York University

Subjects offered:Chemistry, Science+ 2 more

Government and Politics

“Maths and Science tutor, with previous tutoring experience, looking to further help students achieve academic success!”

£36 /hr

Hannah S.

Degree: Medicinal Chemistry and Pharmacology (Masters) - Liverpool University

Subjects offered:Chemistry, English Language+ 3 more

English Language
-Personal Statements-

“I'm currently studying medicinal chemistry and pharmacology at the University of Liverpool as part of an 'integrated masters' course designed to fast track students interested in a chemistry as a profession or continuing study to a PhD...”

About the author

Joshua H.

Currently unavailable: for regular students

Degree: Chemistry (Masters) - Sheffield University

Subjects offered:Chemistry, -Personal Statements-

-Personal Statements-

“Hello everyone!I am currently in my fourth and final year of a masters degree in chemistry at the University of Sheffield.I am here to help you with any problems you may have in chemistry, at any levels. University friends often co...”

MyTutor guarantee

You may also like...

Posts by Joshua

0.250 g of a hydrocarbon known to contain carbon, hydrogen and oxygen was subject to complete combustion and produced 0.3664 g of CO2 and 0.1500 g of H2O. What is the empirical formula of this hydrocarbon?

1.5 g of hydrocarbon undergoes complete combustion to give 4.4 g of CO2 and 2.7 g of H2O. Given this data, what is the empirical formula of this hydrocarbon?

24 g of Magnesium reacts with 16 g of Oxygen to produce 40 g of magnesium oxide. What mass of magnesium would you need to produce 10 g of magnesium oxide?

The relative formula mass of CaO is 56 and the relative formula mass of CO2 is 44. What is the mass of CaO that can be obtained from 200 g of CaCO3. CaO3 -> CaO + CO2

Other GCSE Chemistry questions

Explain the significance of atomic number and mass number in determining atomic properties. Which of these changes in isotopes?

Define relative formula mass (Mr) and calculate the relative formula mass of CaCO3. (Ar: Calcium= 40; Oxygen= 16; Carbon= 12)

How do you make calcium hydroxide (Ca(OH)2) from Calcium carbonate (CaCO3) and what are the equations.

describe advantages and disadvantages of using hydrogen instead of fossil fuels

View GCSE Chemistry tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss