Currently unavailable: for new students
Degree: Chemistry (Doctorate) - Sheffield University
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 always been able to do science, and have struggled in the past myself needing help with understanding some of the more complicated theories in the GCSE and A-level science syllabuses. I have a lot of experience both as a tutee and a tutor (teaching in university labs and tutorials). I like to think I'm very friendly, approachable and very to happy to help!!!
How can I help?
Having had tutors in the past I know what works and what doesn't!
I'd like my sessions to be led by you, so that you're getting the most out of it. So we can focus particular areas you might be struggling with or just brush up on the subject as a whole.
I like pictures and diagrams so I'm a very visual tutor (I think this help with really understanding the basic science)! Once we've grasped the basics, we can move on to brushing up on that good old exam practice!! ;)
|Chemistry||A Level||£30 /hr|
|Before 12pm||12pm - 5pm||After 5pm|
Please get in touch for more detailed availability
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.see more