I recieved a paper today (4th March) to do during work experience (7th-18th March) and I got really stuck on a question.
Here is the question: Calcium tablets are used for people with calcium deficiency Calcium tablets contain calcium carbonate (CaCO3) Calculate the mass of Calcium in each tablet.
I was just wondering if anyone could explain how to do it because I'm pretty stuck. Thank you!!
Work out the RFM (relative formula mass) of the whole compound CaCO3 O x 3 = 48 C = 12 Ca = 40 so, CaCO3 = 100
Then, divide the ram of the element you're looking for by the whole RFM so, 40 / 100 = 0.4
Then times this by 100 to get a percentage (it seems pretty pointless dividing it by 100 then times it again by 100, but sometimes they may ask you of something with an RFM of 40 or something so you always should)
Work out the RFM (relative formula mass) of the whole compound CaCO3 O x 3 = 48 C = 12 Ca = 40 so, CaCO3 = 100
Then, divide the ram of the element you're looking for by the whole RFM so, 40 / 100 = 0.4
Then times this by 100 to get a percentage (it seems pretty pointless dividing it by 100 then times it again by 100, but sometimes they may ask you of something with an RFM of 40 or something so you always should)
0.4 x 100 = 40%
Calcium makes up 40% of the overall mass
Thank you so much for your help!! I really appreciate it!!