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Sagot :
Answer
The empirical formula for this compound PbN₂O₆
Explanation
Given:
% composition: 62.6% Pb, 8.4% N, and 29% O
What to find:
The empirical formula for the compound
Step-by-step solution:
Assume we have 100 grams total of the substance.
Grams Pb: 62.6 g
Grams N: 8.4 g
Grams O: 29 g
Now, let's convert the number of grams of each element into moles below:
Moles Pb: 62.6 g/207.2 g/mol = 0.30 mol
Moles N: 8.4 g/14.0 g/mol = 0.60 mol
Moles O: 29 g/16.0 g/mol = 1.81 mol
Now, let's divide the number of moles of each element by the smallest number obtained:
Pb = 0.30/0.30 = 1
N = 0.60/0.30 = 2
O = 1.81/0.30 = 6
Therefore the empirical formula for this compound PbN₂O₆
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