Question

a compound was found to contain 5.37 % nitrogen. what will be its minimum molecular weight

Answer 1

5.37g5.37g N=100g compound

14g14g N=100×145.37100×145.37

⇒260.7g⇒260.7g compound

((i.e) minimum molecular wt as it should have at least on N)

Answer 2

Answer:260.7

Explanation if nitrogen=5.37g then compound=100g. So,if nitrogen = 14g(gram atomic mass of nitrogen), then the compound=100/5.37*14=260.7g. So,mass of 6.022*10^23 molecules =260.7g . So, mass of one molecule=260.7/6.022*10^23 g=260.7/6.022*10^23*6.022*10^23 amu =260.7amu Hence, minimum relative molecular weight=260.7