qqp question1: How do I know what to put in n1 and n2 in the formula M1 V1/n1 = M2 V2 /n2 while doing titrations? question2: A compound made up of C, N, and Mg on analysis gave the following data  Mg = 12g, C = 12g and N2 = 14g. What is the possible formula of the compound?