Avogadro's constant

What does Avogadro's constant represent?

• The number of atoms in a gram of carbon

• The number of particles in one mole of a substance

• The weight of one mole of gold

• The volume of one mole of water

Which of the following substances contains 6.022 * 10^23 particles?

• 50 grams of carbon

• 1 gram of hydrogen

• 197 grams of gold

• 100 grams of water

How many particles are there in 12 grams of carbon?

• 6.022 * 10^22

• 6.022 * 10^25

• 6.022 * 10^23

• 6.022 * 10^24

Why is Avogadro's constant important for chemists?

• It measures the temperature of reactions

• It determines the speed of chemical reactions

• It is used to calculate the exact quantities of chemicals for reactions

• It helps in determining the color of chemicals

What is the role of Avogadro's constant in chemical reactions?

• It helps in calculating the quantities of reactants and products

• It determines the pH level of solutions

• It measures the energy released in reactions

• It predicts the outcome of reactions