1. A compound with a relative molecular mass of 216 was found to contain 5p 22.2% carbon, 3.7% hydrogen and 74.1% bromine. Determine the empirical
formula and molecular formula of the compound. RAMC=12 H=1 Br=80
*
Your answer​

How many neutrons does a atom of cobalt have?

The following reaction shows sodium carbonate reacting with calcium hydroxide. na2co3 + ca(oh)2 → naoh + caco3 how many grams of naoh are produced from 20.0 grams of na2co3? (molar mass of na = 22.989 g/mol, c = 12.01 g/mol, o = 15.999 g/mol, ca = 40.078 g/mol, h = 1.008 g/mol) 12.2 grams 15.1 grams 24.4 grams 30.2 grams

Which statement is true about this reaction? 14n+1h 15o it is a practical source of energy on earth. it occurs only outside the solar system. its product is heavier than each of its reactants. it shows the critical mass of an element.