What is the relative formula mass of CaCO3?

The relative formula mass (RFM) is simply just a sum of the atomic masses that make up the compound in question.

Ca = 40

C = 12

O = 16

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

Note we have three oxygens so we need to multiply the atomic mass by three before adding the mass of calcium and carbon.

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

10 months ago

Answered by Joshua, a GCSE Chemistry tutor with MyTutor

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


£18 /hr

Jake B.

Degree: Mathematics (Masters) - Durham University

Subjects offered: Chemistry, Maths


“About Me: Hi, my name is Jake, and I am a second year Mathematics Student at Durham University. I have tutored maths for 3 years now, at both GCSE and A level, and I absolutely love it! I My Sessions: During the sessions I will cove...”

£22 /hr

Joe D.

Degree: Philosophy, Politics and Economics (Bachelors) - Durham University

Subjects offered: Chemistry, Physics+ 2 more


“About Me:I am currently studying Philosophy, Politics and Economics at Durham University. So although I now specialise in humanities, I have continued to study the sciences simultaneously and mydepth of experience will enable me to h...”

£22 /hr

Appitha A.

Degree: Cancer Studies (Doctorate) - Kings, London University

Subjects offered: Chemistry, Maths+ 2 more


“My name is Appitha and i have recently finished a 4 year long PhD on Breast Cancer Imaging at King's College London. From a young age, i had the passion to help young people achieve their potential at school by providing one-to-one tu...”

MyTutor guarantee

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

What is the difference between oxidation and reduction?

2.4 g of magnesium reacts with 1.6 g of oxygen. What is the empirical formula of the oxide formed?

Explain which species is oxidised in this reaction: Br2 +2I– = 2Br– +I2

What happens to the melting and boiling points of the halogens as you go down the group?

View GCSE Chemistry tutors


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