6.02

Identify the livestock identification method in this photo:

• tattooing

• ear notching

• ear tagging

• branding

What is the significance of the number 6.02 in chemistry?

• It represents the atomic number of carbon.

• It is the pH of pure water.

• It is Avogadro's number, representing the number of atoms or molecules in one mole of a substance.

• It is the boiling point of water in Celsius.

Avogadro's number is approximately 6.02 x 10^23. What does this number represent?

• The number of protons in a hydrogen atom.

• The number of molecules in one mole of a substance.

• The number of electrons in a carbon atom.

• The number of neutrons in a helium nucleus.

Which of the following equations correctly uses Avogadro's number?

If you have 6.02 x 10^23 molecules of water, how many moles of water do you have?

• 0.5 moles

• 1 mole

• 2 moles

• 6.02 moles

How is Avogadro's number used in determining the molar mass of a substance?

• It is used to calculate the volume of a gas at STP.

• It is used to convert grams to moles by dividing the mass by the molar mass.

• It is used to determine the density of a liquid.

• It is used to find the boiling point of a substance.

What is the relationship between Avogadro's number and the ideal gas law?

• Avogadro's number is used to calculate the pressure of a gas.

• Avogadro's number is used to determine the temperature of a gas.

• Avogadro's number is used to convert the number of moles to the number of particles in the ideal gas law.

• Avogadro's number is used to find the volume of a gas.

In a chemical reaction, how does Avogadro's number help in balancing equations?

• It helps in determining the limiting reactant.

• It helps in converting moles to molecules, ensuring the conservation of mass.

• It helps in calculating the reaction rate.

• It helps in finding the equilibrium constant.

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Which of the following statements is true about Avogadro's number?

• It is a constant used only in physics.

• It is a variable that changes with temperature.

• It is a constant used to relate moles to particles in chemistry.

• It is a unit of measurement for energy.

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NGSS.HS-PS1-7

How many atoms are there in 2 moles of helium gas?

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