A compound is analyzed and found to consist of 50.4% Ce,15.1% N and 34.5% O by mass. What is the correct formula for the compound ? (Atomic wt. of Ce = 140)

A compound contains 50% Ca, 15% C and 35% N atoms by mass. Determine the simplest formula of the compound. (R.A.M.: C = 12, N = 14, Ca = 40.)

A compound on analysis was found to contain 53.33 % C , 15.5 % H , and the rest nitrogen . The formula of the compound is

An organic compound is found to contain C = 54.5%, 0=36.4% and H = 9.1% by mass. Its empirical formula is

A compound X consists of 4.8% carbon and 95.2% bromine by mass. Determine the empirical formula of this compound working correct to one decimal place (C = 12, Br = 80)