Chemistry, asked by muraligm03, 10 months ago

Empirical formula of a compound containing C, H, N and O and weighing 7.3 g was found to contain 3.6 g of carbon, 0.7 g of hydrogen and 1.4 g of nitrogen is

Answers

Answered by VedswaroopK

Answer:

determine the subscripts of the empirical formula, we find the lowest whole number ratio for each element by dividing the moles of each element by the least number of moles, in this case 3.22 mol . The empirical formula is CH5N .In chemistry, the empirical formula of a chemical compound is the simplest positive integer ratio of atoms present in a compound. A simple example of this concept is that the empirical formula of hydrogen peroxide, or H2O2, would simply be HO.

A mole is defined as the mass of the substance which consists of the equal quantity of basic units. Example atoms in 12 grams are the same as 12C. The basic units can be molecules, atoms or formula units based on the substance. A mole fraction indicates the number of chemical elements. One mole of any substance is equal to the value of 6.023 x 1023 (Avagadro number). It can be used to measure the products obtained from the chemical reaction. The unit is denoted by mol.

The formula for the number of moles formula is expressed as

Solved Examples On Number Of Moles Formulas

Example 1: Determine the number of moles in 95g of MnO2.

Solution:

Given

Mass of MnO2 = 95g

Mass of one mole MnO2 = 86.94g

Number of moles formula is

Number of moles = Mass of substance / Mass of one mole

Number of moles = 95 / 86.94

Number of moles = 1.092 mol

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1 Comment

greeeballa hassan elobied JANUARY 21, 2020 AT 12:32 PM

Very clear and to the point