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11 July, 01:03

determine the empirical formula for a compound that has the following analysis: a 13.07 g sample of an unknown substance is composed of 9.48 g of barium, 1.66 g of carbon, and 1.93 g of nitrogen

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  1. 11 July, 01:26
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    Empirical Formula for given compound Ba1C2N2.

    Explanation:

    Step 1; convert the mass of each element into their molar values by dividing available mass by molar masses.

    Molar masses of required elements are as follows; Ba - 137.327, C - 12, N - 14.

    Step 2; Divide all the values by the smallest mole value. For given compound after dividing the masses by molar masses we get 0.0690, 0.1383, 0.1378 for elements Ba, C, N respectively. Divide all three values with the least value which is 0.0690 and note these values.

    Step 3; Convert all the numbers available into whole numbers by multiplying with suitable values. i. e. 3 if values are 0.33, 2 if values are 0.5 etc.

    Step 4; Assign these values to corresponding elements and you will get the above empirical formula.
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