Mole–Mass and Mole–Volume Relationships - Weeblynkscience.weebly.com/uploads/8/7/1/4/8714635/chapter10_section02... · Mole–Mass and Mole– Volume Relationships >The Mole–Mass

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chemistry

© Copyright Pearson Prentice Hall

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Mole–Mass and Mole–Volume Relationships

How can you guess the number of jelly beans in a jar? You estimate the size of a jelly bean and then estimate the dimensions of the container to obtain its volume. In a similar way, chemists use the relationships between the mole and quantities such as mass, volume, and number of particles to solve chemistry problems.

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The Mole–Mass Relationship

The Mole–Mass Relationship

How do you convert the mass of a substance to the number of moles of the substance?

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> The Mole–Mass Relationship

Use the molar mass of an element or compound to convert between the mass of a substance and the moles of a substance.

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SAMPLE PROBLEM

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The Mole–Volume Relationship

The Mole–Volume Relationship

What is the volume of a gas at STP?

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> The Mole–Volume Relationship

Avogadro’s hypothesis states that equal volumes of gases at the same temperature and pressure contain equal numbers of particles.

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The volume of a gas varies with temperature and pressure. Because of these variations, the volume of a gas is usually measured at a standard temperature and pressure.

Standard temperature and pressure (STP) means a temperature of 0°C and a pressure of 101.3 kPa, or 1 atmosphere (atm).

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At STP, 1 mol or, 6.02 × 1023 representative particles, of any gas occupies a volume of 22.4 L.

The quantity 22.4 L is called the molar volume of a gas.

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Calculating Volume at STP

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Calculating Molar Mass from Density

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> The Mole Road Map 10.2


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> The Mole Road Map

The Mole Road Map

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Mole–Mass and Mole–Volume Relationships - Weeblynkscience.weebly.com/uploads/8/7/1/4/8714635/chapter10_section02... · Mole–Mass and Mole– Volume Relationships >The Mole–Mass