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**Mole Day Conversions Activity (Grades 9–10)**\n\nPractice using the mole as a counting unit by converting between **particles**, **moles**, and **grams**, and by working with **scientific notation**. Show careful unit canceling and report answers with reasonable rounding.

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Mole Day basics: Which statement best defines 1 mole?
(Choose one.)

$22.4$ liters of any gas at room temperature

$6.022\times10^{23}$ particles (atoms, molecules, or ions) of a substance

$10^{23}$ particles of any substance

The mass of a substance in grams

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Convert molecules to moles.
A sample contains $1.2044\times10^{24}$ molecules of water. Approximately how many moles of water is that?

$12.0\text{ mol}$

$2.00\text{ mol}$

$6.022\text{ mol}$

$0.200\text{ mol}$

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Convert moles to particles.
How many particles are in $0.250\text{ mol}$ of helium atoms? Use $N_A=6.022\times10^{23}\text{ mol}^{-1}$.

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Convert grams to moles using molar mass.
The molar mass of $\mathrm{CO_2}$ is $44.01\ \text{g/mol}$. How many moles are in $22.0\ \text{g}$ of $\mathrm{CO_2}$?

$0.250\text{ mol}$

$2.00\text{ mol}$

$0.500\text{ mol}$

$44.0\text{ mol}$

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Convert moles to grams.
What mass of $\mathrm{NaCl}$ is $0.125\text{ mol}$? (Molar mass: $58.44\ \text{g/mol}$)

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Scientific notation check.
Select all expressions that are exactly equal to $6.022\times10^{23}$.

$60.22\times10^{23}$

$6.022\times10^{24}$

$602.2\times10^{21}$

$0.6022\times10^{24}$

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Match each chemistry quantity to its most appropriate unit/example.

Draggable item		Corresponding Item
Mass		mol
Gas volume at STP		g
Amount of substance		atoms/molecules/ions
Number of particles		L

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Put these dimensional-analysis steps in order to convert grams ↔ moles correctly.

Multiply/divide and compute the value
Choose a conversion factor using molar mass (g per mol or mol per g)
Write down the given value with its unit
Set up the fraction so the unwanted unit cancels
Report the result with correct unit and appropriate significant figures

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True or False: $1$ mole of any substance contains the same number of particles.

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Ɛnyɛ ampa

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Mole Day Conversions

Mole Day Conversions

Mole Day basics: Which statement best defines 1 mole?
(Choose one.)

Convert molecules to moles.
A sample contains $1.2044\times10^{24}$ molecules of water. Approximately how many moles of water is that?

Convert moles to particles.
How many particles are in $0.250\text{ mol}$ of helium atoms? Use $N_A=6.022\times10^{23}\text{ mol}^{-1}$.

Convert grams to moles using molar mass.
The molar mass of $\mathrm{CO_2}$ is $44.01\ \text{g/mol}$. How many moles are in $22.0\ \text{g}$ of $\mathrm{CO_2}$?

Convert moles to grams.
What mass of $\mathrm{NaCl}$ is $0.125\text{ mol}$? (Molar mass: $58.44\ \text{g/mol}$)

Scientific notation check.
Select all expressions that are exactly equal to $6.022\times10^{23}$.

Match each chemistry quantity to its most appropriate unit/example.

Put these dimensional-analysis steps in order to convert grams ↔ moles correctly.

True or False: $1$ mole of any substance contains the same number of particles.

What is the name of the constant that equals $6.022\times10^{23}$ particles per mole?

Mole Day basics: Which statement best defines 1 mole?
(Choose one.)

Convert molecules to moles.
A sample contains $1.2044\times10^{24}$ molecules of water. Approximately how many moles of water is that?

Convert moles to particles.
How many particles are in $0.250\text{ mol}$ of helium atoms? Use $N_A=6.022\times10^{23}\text{ mol}^{-1}$.

Convert grams to moles using molar mass.
The molar mass of $\mathrm{CO_2}$ is $44.01\ \text{g/mol}$. How many moles are in $22.0\ \text{g}$ of $\mathrm{CO_2}$?

Convert moles to grams.
What mass of $\mathrm{NaCl}$ is $0.125\text{ mol}$? (Molar mass: $58.44\ \text{g/mol}$)

Scientific notation check.
Select all expressions that are exactly equal to $6.022\times10^{23}$.

Match each chemistry quantity to its most appropriate unit/example.

Put these dimensional-analysis steps in order to convert grams ↔ moles correctly.

True or False: $1$ mole of any substance contains the same number of particles.

What is the name of the constant that equals $6.022\times10^{23}$ particles per mole?

Mole Day Conversions

Mole Day Conversions

Mole Day basics: Which statement best defines 1 mole?(Choose one.)

Convert molecules to moles.A sample contains $1.2044\times10^{24}$ molecules of water. Approximately how many moles of water is that?

Convert moles to particles.How many particles are in $0.250\text{ mol}$ of helium atoms? Use $N_A=6.022\times10^{23}\text{ mol}^{-1}$.

Convert grams to moles using molar mass.The molar mass of $\mathrm{CO_2}$ is $44.01\ \text{g/mol}$. How many moles are in $22.0\ \text{g}$ of $\mathrm{CO_2}$?

Convert moles to grams.What mass of $\mathrm{NaCl}$ is $0.125\text{ mol}$? (Molar mass: $58.44\ \text{g/mol}$)

Scientific notation check.Select all expressions that are exactly equal to $6.022\times10^{23}$.

Match each chemistry quantity to its most appropriate unit/example.

Put these dimensional-analysis steps in order to convert grams ↔ moles correctly.

True or False: $1$ mole of any substance contains the same number of particles.

What is the name of the constant that equals $6.022\times10^{23}$ particles per mole?

Mole Day basics: Which statement best defines 1 mole?(Choose one.)

Convert molecules to moles.A sample contains $1.2044\times10^{24}$ molecules of water. Approximately how many moles of water is that?

Convert moles to particles.How many particles are in $0.250\text{ mol}$ of helium atoms? Use $N_A=6.022\times10^{23}\text{ mol}^{-1}$.

Convert grams to moles using molar mass.The molar mass of $\mathrm{CO_2}$ is $44.01\ \text{g/mol}$. How many moles are in $22.0\ \text{g}$ of $\mathrm{CO_2}$?

Convert moles to grams.What mass of $\mathrm{NaCl}$ is $0.125\text{ mol}$? (Molar mass: $58.44\ \text{g/mol}$)

Scientific notation check.Select all expressions that are exactly equal to $6.022\times10^{23}$.

Match each chemistry quantity to its most appropriate unit/example.

Put these dimensional-analysis steps in order to convert grams ↔ moles correctly.

True or False: $1$ mole of any substance contains the same number of particles.

What is the name of the constant that equals $6.022\times10^{23}$ particles per mole?

Mole Day basics: Which statement best defines 1 mole?
(Choose one.)

Convert molecules to moles.
A sample contains $1.2044\times10^{24}$ molecules of water. Approximately how many moles of water is that?

Convert moles to particles.
How many particles are in $0.250\text{ mol}$ of helium atoms? Use $N_A=6.022\times10^{23}\text{ mol}^{-1}$.

Convert grams to moles using molar mass.
The molar mass of $\mathrm{CO_2}$ is $44.01\ \text{g/mol}$. How many moles are in $22.0\ \text{g}$ of $\mathrm{CO_2}$?

Convert moles to grams.
What mass of $\mathrm{NaCl}$ is $0.125\text{ mol}$? (Molar mass: $58.44\ \text{g/mol}$)

Scientific notation check.
Select all expressions that are exactly equal to $6.022\times10^{23}$.

Mole Day basics: Which statement best defines 1 mole?
(Choose one.)

Convert molecules to moles.
A sample contains $1.2044\times10^{24}$ molecules of water. Approximately how many moles of water is that?

Convert moles to particles.
How many particles are in $0.250\text{ mol}$ of helium atoms? Use $N_A=6.022\times10^{23}\text{ mol}^{-1}$.

Convert grams to moles using molar mass.
The molar mass of $\mathrm{CO_2}$ is $44.01\ \text{g/mol}$. How many moles are in $22.0\ \text{g}$ of $\mathrm{CO_2}$?

Convert moles to grams.
What mass of $\mathrm{NaCl}$ is $0.125\text{ mol}$? (Molar mass: $58.44\ \text{g/mol}$)

Scientific notation check.
Select all expressions that are exactly equal to $6.022\times10^{23}$.