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Which of the following is not an empirical formula?

C3H8O
C2N2H8
Sb2S3
BeCr2O7

User Pixis
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2 Answers

4 votes
The Answer would be C2N2H8 because it could be farther split apart by dividing by 2.
User Keith Irwin
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1 vote

Answer: The compound which is not an empirical formula is
C_2N_2H_8

Step-by-step explanation:

Empirical formula is defined as the formula in which atoms in a compound are present in simplest whole number ratios.

For the given options:

Option A:
C_3H_8O

This compound is made by the combination of carbon, hydrogen and oxygen. The mole ratio of the elements are
C:H:O::3:8:1

Option B:
C_2N_2H_8

This compound is made by the combination of carbon, hydrogen and nitrogen. The mole ratio of the elements are
C:N:H::2:2:8

This ratio can be reduced to lowest numbers. The empirical formula of this becomes
C_(2/2)N_(2/2)H_(8/2)=CNH_4

Option C:
Sb_2S_3

This compound is made by the combination of tin and sulfur atoms. The mole ratio of the elements are
SB:S::2:3

Option D:
BeCr_2O_7

This compound is made by the combination of beryllium, chromium and oxygen. The mole ratio of the elements are
Be:Cr:O::1:2:7

Hence, the compound which is not an empirical formula is
C_2N_2H_8

User JuneT
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