MYTUTOR SUBJECT ANSWERS

3248 views

How do I calculate the relative formula mass of Calcium carbonate (CaCO3)

The relative formula madd of a compound comes from the total mass of all of the elments within the compound.

So in the case of calcium carbonate (CaCO3) we have;

                              1 x Ca

                               1 x C

                               3 x O

So we first need to know the relative mass nnumber (Mr) of these individual elements. This information comes from the periodic table and is determined by the number of protons + neutrons in an atom.

            Mass number = protons + neutrons

So if we look at the elements in our compound we have;

                                     20Ca40  6C12  8O16

In each case the mass number is the bottom right number (in bold), we can now calculate our relative formula mass using these numbers so we have;

           Ca(1 x 40) + C(1 x 12) + O(3 x 16)

    =     40 + 12 + 48

   =       100 g/mol

The units of relative formula mass are g/mol, which tells us that 1 mole of CaCO3 has a mass of 100 g.

Jenny B.

1 year ago

Answered by Jenny, a GCSE Chemistry tutor with MyTutor


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

301 SUBJECT SPECIALISTS

£18 /hr

Tamara A.

Degree: Medicine (Bachelors) - Liverpool University

Subjects offered:Chemistry, Maths+ 1 more

Chemistry
Maths
Biology

“I'm a friendly second year medical student with a year's experience in tutoring. I'm passionate about science, and I'm patient and approachable.”

MyTutor guarantee

£18 /hr

Alex H.

Degree: Preclinical Medicine (Bachelors) - Oxford, Keble College University

Subjects offered:Chemistry, .BMAT (BioMedical Admissions)

Chemistry
.BMAT (BioMedical Admissions)

“I am passionate about science and Medicine, and I want to be able to instil a passion for the subjects I tutor in students.”

£18 /hr

Eve R.

Degree: MEng Chemical Engineering with a Year in Industry (Masters) - Sheffield University

Subjects offered:Chemistry, Extended Project Qualification+ 1 more

Chemistry
Extended Project Qualification
Biology

“A patient and fun tutor with the time and dedication to foster the needs of all students- even those who aren't always the quickest to learn.”

About the author

Jenny B.

Currently unavailable: for regular students

Degree: Chemistry (Doctorate) - Sheffield University

Subjects offered:Chemistry, Physics+ 2 more

Chemistry
Physics
Maths
Biology

“Who am I? I've just finished my PhD in Chemistry at the University of Sheffield. I now "do science" for a job and I love it! I'm now looking to pass on my knowledge and enthusiasm on to the next generation of "scientists". I haven't ...”

MyTutor guarantee

|  1 completed tutorial

You may also like...

Other GCSE Chemistry questions

What is the relative formula mass of ammonium nitrate, NH4NO3?

Give an example of a strong acid.

Sodium hydroxide reacts with hydrochloric acid, what are the products formed?

Why does an atom have no overall charge?

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

mtw:mercury1:status:ok