An organic compound containing C and H gave the following analysis C = 40%, H = 6.7%. Its empirical formulawould be

The empirical formula of a compound is the simplest whole number ratio of atoms of each element in a compound.

Here's how to find the empirical formula for this compound:

1. Assume that you have 100g of the compound. This means that you have 40g of Carbon (C) and 6.7g of Hydrogen (H).

2. Convert the mass of each element to moles. The atomic mass of C is approximately 12g/mol and the atomic mass of H is approximately 1g/mol. So, you have 40g/12g/mol = 3.33 mol of C and 6.7g/1g/mol = 6.7 mol of H.

3. Write the ratio of moles. This gives you C3.33H6.7.

4. Divide each number of moles by the smallest number of moles calculated. In this case, 3.33 is the smallest. So, you get C(3.33/3.33)H(6.7/3.33) = CH2.

So, the empirical formula of the compound is CH2.