Is melting ice an endothermic or exothermic? its a big class discussion in chemistry and the teacher won't tell us until the who
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Answer : The empirical of the compound is,
Explanation :
If percentage are given then we are taking total mass is 100 grams.
So, the mass of each element is equal to the percentage given.
Mass of C = 76.71 g
Mass of H = 7.02 g
Mass of N = 16.27 g
Molar mass of C = 12 g/mole
Molar mass of H = 1 g/mole
Molar mass of N = 14 g/mole
Step 1 : convert given masses into moles.
Moles of C =
Moles of H =
Moles of N =
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For C =
For H =
For N =
The ratio of C : H : N = 5.5 : 6 : 1
To make in a whole number we are multiplying the ratio by 2, we get:
The ratio of C : H : N = 11 : 12 : 2
The mole ratio of the element is represented by subscripts in empirical formula.
The Empirical formula =
Therefore, the empirical of the compound is,