Determining the Empirical Formula of a Compound (FACTORY ESCAPE GAME)

FACTORY ESCAPE GAME

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Determining the Empirical Formula of a Compound from its Percent Composition

THE MISSION

Determine the empirical formula of a compound.

THE base

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QUESTION 1/5

chemical formula

It is the written representation of the chemical proportions of atoms that comprise a particular compound.

molar mass

QUESTION 2/5

empirical formula

This chemical formula shows the lowest whole-number ratio of elements that comprise a compound.

molecular formula

structural formula

QUESTION 3/5

molar mass

It refers to the ratio of the mass of an element and the mass of the compound, multiplied by 100%.

atomic weight

percent composition

QUESTION 4/5

atomic weight

It is the fundamental quantity that is used to describe the amount of elements in a compound.

mole

mass

QUESTION 5/5

common formula

It is another term that is used to describe the empirical formula.

simplest formula

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QUESTION 1/3

True

The molecular formula is also known as the simplest chemical formula.

False

QUESTION 2/3

True

The percent composition of the compound may be used to determine its empirical formula.

False

QUESTION 3/3

True

The empirical formula of the compound also tells the actual number of atoms present in it.

False

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QUESTION 1/3

Cl2O

What is the empirical formula for a compound that contains 0.063 mol chlorine and 0.22 mol oxygen?

Cl2O7

ClO

QUESTION 2/3

NO

A compound contains 1.85 mol N and 4.63 mol O. What is the empirical formula?

N5O2

N2O5

QUESTION 3/3

CH2

Calculate the empirical formula of a compound containing 6.80 mol C and 18.11 mol H.

C3H8

C3H2

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QUESTION 1/3

NO

What is the empirical formula of a compound if a sample contains 0.130 g of nitrogen and 0.358 g of oxygen?

N2O

N4O10

N2O5

QUESTION 2/3

NiO

Ni3O2

In the laboratory, a sample is found to contain 1.05 grams of nickel and 0.29 grams oxygen. Determine the empirical formula.

NiO2

Ni2O3

QUESTION 3/3

FeO3

Fe2O3

A sample of the black mineral hematite, an oxide of iron found in many iron ores, contains 34.97 g of iron and 15.03 g of oxygen. What is the empirical formula of hematite?

FeO

Fe3O5

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QUESTION 1/3

CH2O2

CHO

What is the empirical formula for a compound that contains 26.1% carbon, 4.3% hydrogen and 69.6 % oxygen?

C3H2O2

CHO2

QUESTION 2/3

NO

NO2

An oxide of nitrogen contains 30.45% N and 69.55% O. What is its empirical formula?

N2O3

NO3

QUESTION 3/3

C3O2

The bacterial fermentation of grain to produce ethanol forms a gas with a percent composition of 27.29% C and 72.71% O. What is the empirical formula for this gas?

CO

CO2

C2O3

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