# 14 which two compounds have the same empirical formula Quick Guide

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### If two compounds have the same empirical formula but different molecular formulae they must have…

If two compounds have the same empirical formula but different molecular formulae they must have…
If two compounds have the same empirical formula but different molecular formulae they must have…

### 2.11: Empirical and Molecular Formulas [1]

– Distinguish between empirical formula and molecular formula. – Determine empirical formula and molecular formula using percent composition
Empirical measurements are based on a measurable (empirical) quantity like mass. Knowing the mass of each element in a compound we can determine its formula
Empirical Formula: Lowest whole number ratio of the elements in a compound. Molecular Formula: Actual whole number ratio of the elements in a compound.

### STATEMENT 1: Two compounds cannot have the same empirical formula.STATEMENT 2: Compounds that have the same empirical formula may have different molecular formulae. [2]

STATEMENT-1: Two compounds cannot have the same empirical formula.. STATEMENT-2: Compounds that have the same empirical formula may have different molecular formulae.
The correct option is D Statement-1 is false, but statement-2 is true. Statement-1 is false as two compounds can have the same empirical formula
However, statement-2 is true as the compounds that have the same empirical formula may have a different molecular formula.

### formula: [3]

If a compound is molecular, the molecular formula is preferred to the empirical formula since it gives more information. A molecule of glucose, for example, consists of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms
From the formula one can also deduce the proportion of the atoms of each element making up the compound: one atom of carbon to every two atoms of hydrogen to every one atom of oxygen (6 : 12 : 6=1 : 2 : 1). The empirical formula of glucose, CH2O, shows only the proportion, not the actual number of atoms.
Another example is furnished by ethyne (acetylene), whose molecular formula is C2H2, and benzene, whose molecular formula is C6H6. In addition to showing the actual number of atoms, molecular formulas are also more useful than empirical formulas in that they explicitly show radicals

### Write any two examples of compounds which have same molecular and empirical formulae. [4]

– It is the simplest formula, that shows the simplest whole-number ratio between the atoms of the elements in the compound.. – The empirical formula of a compound represents only the atomic ratio of the various elements present in it’s molecule.
If , the molecular formula and empirical formula are the same.. Part 3: Molecular and empirical formula of Formaldehyde (),:-
Part 4: Molecular and empirical formula of methane (),:-. Since , as a result, the molecular formula of formaldehyde () is the same as the empirical formula.

### Two compounds have the same empirical formula. One substance is a gas, the other is a viscous liqquid. [5]

The empirical formula is only the simplest representation of the chemical formula.. With its simplest representation of CH, C2H2 this is the chemical formula for acetylene, which is a gas
The difference is between the chemical formula and the empirical formula. The empirical formula is the simplest representation whereas the chemical formula is the actual representation of the compound.

### CHEMISTRY COMMUNITY [6]

Is it possible for compounds to have the same empirical formula? If so, what’s an example?. Since empirical formulas are only referring to a compound’s ratio of atoms rather than the exact moles of each atom (which would then be its molecular formula), any two compounds that have the same ratio and type of atoms would have the same empirical formula
It is definitely possible for compounds to have the same empirical formula. Take the compounds glucose and fructose, for example
For instance, glucose has a ring consisting of 6 atoms, whereas fructose has a ring consisting of 5 atoms. Because they both have the same molecular formula (C6H12O6), they will also have the same empirical formula: CH2O

### formula: [7]

If a compound is molecular, the molecular formula is preferred to the empirical formula since it gives more information. A molecule of glucose, for example, consists of 6 carbon atoms, 12 hydrogen atoms, and 6 oxygen atoms
From the formula one can also deduce the proportion of the atoms of each element making up the compound: one atom of carbon to every two atoms of hydrogen to every one atom of oxygen (6 : 12 : 6=1 : 2 : 1). The empirical formula of glucose, CH2O, shows only the proportion, not the actual number of atoms.
Another example is furnished by ethyne (acetylene), whose molecular formula is C2H2, and benzene, whose molecular formula is C6H6. In addition to showing the actual number of atoms, molecular formulas are also more useful than empirical formulas in that they explicitly show radicals

### Which of the following pairs of compounds have the same empirical formula? acetylene, C2H2, and benzene, C6H6; ethane, C2H6, and butane, C4H10; nitrogen dioxide, NO2, and dinitrogen tetroxide, N2O4; d [8]

Which of the following pairs of compounds have the same empirical formula? acetylene, C2H2, and…. Which of the following pairs of compounds have the same empirical formula?
ethane, C{eq}_{2} {/eq}H{eq}_{6} {/eq}, and butane, C{eq}_{4} {/eq}H{eq}_{10} {/eq}. nitrogen dioxide, NO{eq}_{2} {/eq}, and dinitrogen tetroxide, N{eq}_{2} {/eq}O{eq}_{4} {/eq}
In an empirical formula, the smallest whole-number ratio of elements is used. This means the ratio of elements in a chemical formula is reduced to the lowest terms

### Two or More Compounds Can Identical Formulas [9]

An empirical formula lists the elements of a compound but not the structure. Multiple compounds can have the same empirical formula and a different structure.
There are compounds with the same empirical formula in which spatial orientation is the only difference. Sometimes one structure can be changed into another structure of the same formula
In some cases, a simple bond shift produces different structures with no formula change. In fact, 2-butene exists in two forms, trans-2-butene and cis-2-butene

### If two compounds have the same empirical formula but different molecular .. [10]

If two compounds have the same empirical formula but different molecular formulae, they must have. Since, the molecular formula is ‘n’ times the empirical formula, therefore, different compounds having the same empirical formula must have different molecular weights.
Teaches : Biology, Physical Chemistry, Organic Chemistry. Practice more questions from Some Basic Concepts of Chemistry
Assertion (A) Significant figures for 0.200 is 3 where as for 200 it is 1.. Reason (R) Zero at the end or right of a number are significant provided they are not on the right side of the decimal point.

### SOLVED: If two compounds have the same empirical formula but different molecular fomulae they must have [1987-1 Mark] (a) different percentage composition (b) different molecular weight (c) same visco [11]

Get 5 free video unlocks on our app with code GOMOBILE. If two compounds have the same empirical formula but different molecular fomulae they must have [1987-1 Mark]
If two compounds have the same empirical formula but different molecular fomulae they must have [1987-1 Mark](a) different percentage composition(b) different molecular weight(c) same viscosity(d) same vapour density. If two compounds have the same empirical formula but different molecular formulae they must have:(a) Same viscosity(b) Same vapour density(c) Different molecular weight(d) Different percentage composition
Two compounds having different percent compositions of the same two elements are not the same compound. The empirical formula and molecular formula of a given compound are never the same

### Empirical formula [12]

This article needs additional citations for verification. In chemistry, the empirical formula of a chemical compound is the simplest whole number ratio of atoms present in a compound.[1] A simple example of this concept is that the empirical formula of sulfur monoxide, or SO, would simply be SO, as is the empirical formula of disulfur dioxide, S2O2
However, their molecular formulas, which express the number of atoms in each molecule of a chemical compound, are not the same.. An empirical formula makes no mention of the arrangement or number of atoms
The molecular formula, on the other hand, shows the number of each type of atom in a molecule.[2] The structural formula shows the arrangement of the molecule. It is also possible for different types of compounds to have equal empirical formulas.

### (a) if two compounds have the same empirical formula but differ-Turito [13]

(A) If two compounds have the same empirical formula but different molecular formula, they have same vapour density.. – If both (A) and (R) are correct and (R) is the correct explanation of (A).
The correct answer is: If both (A) and (R) are incorrect.. The desiccants used for absorbing water during Liebig’s method for estimation of carbon and hydrogen are:
Formula which represents a simple ratio of atoms of different elements present in a molecule of the substance is called:. Formula which represents a simple ratio of atoms of different elements present in a molecule of the substance is called:

### Answered: Two compounds have the same… [14]

Polymers are large molecules composed of simple units repeated many times. Thus, they often have relatively simple empirical formulas
What is the difference between the empirical and molecular formula of a compound? Can they ever be the same? Explain.. hat is the difference between the empirical and molecular for mulas of a compound? Can they ever be the same? Explain.
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### Sources

1. https://chem.libretexts.org/Courses/University_of_Arkansas_Little_Rock/Chem_1402%3A_General_Chemistry_1_(Belford)/Text/2%3A_Atoms_Molecules_and_Ions/2.11%3A_Empirical_and_Molecular_Formulas#:~:text=Multiple%20molecules%20can%20have%20the,1.