Mole and Avogadro's Number

What is Avogadro's number?

• A) 6.022 × 10²²

• B) 6.022 × 10²³

• C) 6.022 × 10²⁴

• D) 6.022 × 10²⁵

B) 6.022 × 10²³

How many particles are in one mole of a substance?

• A) 12

• B) 1.204 × 10²³

• C) 6.022 × 10²³

• D) 1.602 × 10¹⁹

C) 6.022 × 10²³

Which of the following best represents the number of particles in one mole?

• A) Dozen

• B) Half-dozen

• C) Avogadro's number

• D) Atomic number

C) Avogadro's number

What is the term used for a general reference to atoms, molecules, or other particles?

• A) Moles

• B) Particles

• C) Molar Mass

• D) Atomic Mass

B) Particles

What is the molar mass of Carbon?

• A) 14.01 g/mol

• B) 32.07 g/mol

• C) 12.01 g/mol

• D) 65.38 g/mol

C) 12.01 g/mol

How many grams are in four moles of Carbon?

• A) 12.01 g

• B) 24.02 g

• C) 48.04 g

• D) 96.08 g

C) 48.04 g

What is the molar mass of Zinc (Zn)?

• A) 12.01 g/mol

• B) 14.01 g/mol

• C) 32.07 g/mol

• D) 65.38 g/mol

D) 65.38 g/mol

What is the molecular mass of Glucose (C₆H₁₂O₆)?

• A) 180.18 g/mol

• B) 164.10 g/mol

• C) 149.12 g/mol

• D) 96.00 g/mol

A) 180.18 g/mol

For Calcium Nitrate (Ca(NO₃)₂), what is the total molecular mass?

• A) 72.06 g/mol

• B) 96.00 g/mol

• C) 164.10 g/mol

• D) 180.18 g/mol

C) 164.10 g/mol

What is the molecular mass of Ammonium Phosphate ((NH₄)₃PO₄)?

• A) 149.12 g/mol

• B) 180.18 g/mol

• C) 96.00 g/mol

• D) 64.00 g/mol

A) 149.12 g/mol

What do coefficients in chemical equations represent?

• A) Only the number of molecules

• B) Only the number of moles

• C) Both the number of molecules and moles

• D) The total energy change in the reaction

C) Both the number of molecules and moles

In the reaction 4 Fe + 3 O₂ → 2 Fe₂O₃, how many moles of Fe₂O₃ are produced?

• A) 4

• B) 3

• C) 2

• D) 6

C) 2

If you have the density and mass of a substance, how can you find the volume?

B) Volume = Mass / Density

Given the density and volume of a substance, how do you find the mass?

• A) Mass = Density × Volume

• B) Mass = Volume / Density

• C) Mass = Density / Volume

• D) Mass = Volume × Density

A) Mass = Density × Volume

What is the formula to calculate density if mass and volume are known?

• A) Density = Mass × Volume

• B) Density = Volume / Mass

• C) Density = Mass / Volume

• D) Density = Mass + Volume

C) Density = Mass / Volume

What is the formula for calculating density?

• A) Density = Mass × Volume

• B) Density = Mass / Volume

• C) Density = Volume / Mass

• D) Density = Mass + Volume

B) Density = Mass / Volume

If you know the density and volume of a substance, how do you find the mass?

• A) Mass = Density × Volume

• B) Mass = Volume / Density

• C) Mass = Density / Volume

• D) Mass = Volume + Density

A) Mass = Density × Volume

What is the correct formula to calculate volume if you have mass and density?

• A) Volume = Mass × Density

• B) Volume = Density / Mass

• C) Volume = Mass / Density

• D) Volume = Density × Mass

C) Volume = Mass / Density

Using the pyramid method, how would you find the mass if you know the density and volume?

• A) Multiply density by volume

• B) Divide volume by density

• C) Add density to volume

• D) Subtract density from volume

A) Multiply density by volume

Which formula is used to determine volume given mass and density?

• A) Volume = Density / Mass

• B) Volume = Mass / Density

• C) Volume = Mass × Density

• D) Volume = Density × Mass

B) Volume = Mass / Density

In the pyramid method, if you have mass and density, which operation is used to find the volume?

• A) Addition

• B) Subtraction

• C) Multiplication

• D) Division

D) Division

To find density, you need to divide which two quantities?

• A) Mass and Volume

• B) Volume and Mass

• C) Mass and Density

• D) Density and Volume

A) Mass and Volume

If the mass of an object is 50 grams and the volume is 10 cubic centimeters, what is the density?

• A) 5 g/cm³

• B) 0.2 g/cm³

• C) 10 g/cm³

• D) 0.5 g/cm³

A) 5 g/cm³

If an object has a density of 8 g/cm³ and the mass is 64 grams, what is the volume?

• A) 8 cm³

• B) 0.125 cm³

• C) 512 cm³

• D) 16 cm³

D) 16 cm³

An object occupies a volume of 20 liters and has a density of 2 kg/L. What is its mass?

• A) 10 kg

• B) 40 kg

• C) 0.1 kg

• D) 5 kg

B) 40 kg