Calculate the number of moles in a sample of 113.47g of Ca(HCO3)2.
Using the AQA specimen data sheet we see that the RAMs of the following elements areCa = 40.1H = 1.0C = 12.0O = 16.0Therefore the total mass for one mole isCa + 2x(H + C + O+O+O)= 40.1 + 2x(1+12+16+16+16)= 40.1 + 2x61 = 40.1+122=162.1moles = mass / RAM=113.47/162.1 = 0.7 moles
JL
Related Chemistry A Level answers
All answers ▸How can amino acids act as both acids and bases?
Part 2: from the empirical formula, calculate the molecular formula if the molecular weight of the substance is 180 g/mol
Define the term standard electrode potential
Lead (IV) oxide reacts with concentrated hydrochloric acid as follows: PbO2(s) + 4HCl(aq) -----> PbCl2(s) + Cl2(g) + 2H2O(l) What mass of lead chloride would be obtained from 37.2g of PbO2, and what mass of chlorine gas would be produced