Homework Help: Chemistry

Posted by Matthew on Monday, February 20, 2012 at 5:42pm.

I need some help with some of these questions:

The action of bacteria on meat and fish produces a poisonous compound called cadaverine. As its name implies, it stinks! It is 58.77 percent carbon, 13.81 percent hydrogen, and 27.40 percent nitrogen. Its molecular weight is 102.2 g/mol. Determine the molecular formula.

Calculate the empirical formula for a chemical compound that gives the following analysis: 65.2 g scandium and 34.8 g oxygen.

A certain compound has an empirical formula of NH2O. Its molar mass is between 55 and 65 g/mol. What is its molecular formula?

compound has a molar mass of 100 g/mol and the percent composition (by mass) of 65.45 percent C, 5.45 percent H, and 29.09 percent O. Determine the empirical formula and the molecular formula.

Chemistry - DrBob222, Monday, February 20, 2012 at 6:02pm
All of these are alike.
Convert g to moles. mols = g/molar mass.
Then find the ratio of the elements to each other with the smallest number being 1.00. The easy way to do that is to divide the smallest number by itself (giving it 1.00), then divide the other numbers by the same small number.
Post your work if you get stuck.

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