Mole Conversions

A mole is approximately...

• 6.22 E+23 things.

• 6.022 E+23 things.

• 22.4 E+23 things.

• 6.022 E-23 things.

Avogadro’s number is used...

• when converting moles to the number of different elements, and vice versa.

• when converting moles to the number of molecules, and vice versa.

• when converting moles to their molar mass, and vice versa.

• when converting moles to the volume of the gas, and vice versa.

At Standard Temperature and Pressure (STP), 1 mole of a given gas will be equal to...

• 1000 L of the gas.

• 1 billion atoms.

• 6.22 L of the gas.

• 22.4 L of the gas.

What is the volume of 3 moles of helium gas at Standard Temperature and Pressure (STP)?

• 67.2 L

• 66.9 L

• 67.3 L

• 67.1 ml

The molar mass of a compound is...

• the sum of the standard atomic masses of the constituent atoms.

• the mass of that compound multiplied by the amount of substance measured in moles.

• the mass of that compound divided by the amount of substance measured in moles.

• the mass of that compound divided by number of particles in the substance.

At Standard Temperature and Pressure (STP), 56.95644 grams of oxygen is approximately equal to...

• 3.56 moles.

• 79.74 liters.

• 3.56 liters.

• 3.55 moles.

About how many molecules are present in 247.45 grams of Ruthenium?

• 1.01 E+02

• 1.49 E+26

• 1.47 E+24

• 2.50 E+04

Tags

NGSS.HS-PS1-1

At Standard Temperature and Pressure (STP), given 70.784 L of Argon gas, about how many grams of Argon are present?

• 3.16 g

• 126.2 g

• 126.2 kg

• 3.16 kg

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