3. It is found a certain sample of a compound contains 23.0g of sodium and 35.5g of chlorine. a. What is the percent composition of this compound? b. How much chlorine would be needed to make 7.0g of this compound? 4. Determine the empirical formula for the following compounds a. A poisonous gas, cyanogen, is 46.14% carbon and 53.8% nitrogen. What is the empirical formula of cyanogen? b. A fuel is 85.59% carbon and 14.41% hydrogen. Determine the empirical formula.

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A:

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A: To calculate the number of moles of H2O and BeCO3.

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A: * Moles = Mass / molar mass  * 1 mol = 6.022 × 10²³ atoms or molecules * Molar mass of Carbon = 12…

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A: Option( B) is correct.

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Q: For the formula  K3N  What is the percent Nitrogen in the compound

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A:

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A:

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Q: Question attached

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Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.