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

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FACTORY ESCAPE GAME

Determining the Empirical Formula of a Compound from its Percent Composition

Determine the empirical formula of a compound.

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QUESTION 1/5

molar mass

chemical formula

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

structural formula

QUESTION 2/5

molecular formula

empirical formula

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

percent composition

QUESTION 3/5

atomic weight

molar mass

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

mass

QUESTION 4/5

mole

atomic weight

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

QUESTION 5/5

simplest formula

common formula

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

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QUESTION 1/3

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

False

True

QUESTION 2/3

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

False

True

QUESTION 3/3

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

False

True

the base

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QUESTION 1/3

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

ClO

Cl2O7

Cl2O

QUESTION 2/3

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

N2O5

N5O2

NO

QUESTION 3/3

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

C3H2

C3H8

CH2

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QUESTION 1/3

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

N2O5

N4O10

N2O

NO

QUESTION 2/3

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

Ni2O3

NiO2

Ni3O2

NiO

QUESTION 3/3

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?

Fe3O5

FeO

Fe2O3

FeO3

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QUESTION 1/3

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

CHO2

C3H2O2

CHO

CH2O2

QUESTION 2/3

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

NO3

N2O3

NO2

NO

QUESTION 3/3

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?

C2O3

CO2

CO

C3O2

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