Multiple Choice
Given a sample containing 3.72 g of phosphorus (P) and 21.28 g of chlorine (Cl), what is the empirical formula of the compound formed?
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3. Chemical Reactions
Empirical Formula
Multiple Choice
Which of the following represents the empirical formula for the compound a3b9?
A
a9b27
B
ab3
C
ab2
D
a3b9
Verified step by step guidance1
Understand that the empirical formula represents the simplest whole-number ratio of atoms in a compound.
Given the formula a3b9, identify the subscripts for elements a and b, which are 3 and 9 respectively.
Find the greatest common divisor (GCD) of the subscripts 3 and 9, which is 3.
Divide each subscript by the GCD to simplify the ratio: \( \frac{3}{3} = 1 \) for a and \( \frac{9}{3} = 3 \) for b.
Write the empirical formula using the simplified subscripts: \( \mathrm{a} \mathrm{b}_3 \).
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