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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.

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

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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 $6.022\times10^{23}$.