Chemistry Chapter on Molar Concepts

Play an AI-generated podcast conversation about this lesson

How many seconds are in two days?

120,000 s

86,400 s

144,000 s

172,800 s (correct)

What is the volume of 2 liters of milk in cubic meters?

0.002 m³ (correct)

2 m³

0.02 m³

0.0002 m³

What is the relationship between liters and cubic centimeters?

1 L = 1000 cm³ (correct)

1 L = 10 cm³

1 L = 1,000,000 cm³

1 L = 100 cm³

According to the Law of Conservation of Mass, what happens in a chemical reaction?

Mass remains constant Signup and view all the answers

If 1 inch equals 2.54 cm, how many inches are there in 30 cm?

11.81 in Signup and view all the answers

What unit factor converts days to hours?

1 day = 24 h Signup and view all the answers

Which of the following demonstrates unit cancellation in dimensional analysis?

All of the above Signup and view all the answers

What principle underlies the combination of elements to form compounds?

Both A and B Signup and view all the answers

What is the numerical value that represents one mole of a substance?

6.022 × 10^23 Signup and view all the answers

What is the molar mass of glucose (C6H12O6)?

180.16 g mol–1 Signup and view all the answers

What does the term 'molar mass' refer to?

The mass of one mole of a substance in grams Signup and view all the answers

What is the molar mass of sodium chloride (NaCl)?

58.5 g mol–1 Signup and view all the answers

Which of the following describes the concept of a mole?

It is the amount of substance that contains 6.022 × 10^23 entities Signup and view all the answers

How many atoms are in one mole of hydrogen atoms?

6.022 × 10^23 Signup and view all the answers

What is the mass percent of hydrogen in water (H2O)?

11.11% Signup and view all the answers

How is the molar mass related to the atomic/molecular formula mass expressed in atomic mass units (u)?

It is numerically equal to the atomic/molecular formula mass in u Signup and view all the answers

What does the Law of Conservation of Mass state regarding matter?

Matter can neither be created nor destroyed. Signup and view all the answers

Which of the following best describes the measurements necessary for the Law of Conservation of Mass?

Exact measurements of the masses of reactants and products. Signup and view all the answers

What does the Law of Definite Proportions state about a given compound?

It contains exactly the same proportions of elements by weight. Signup and view all the answers

When gases react according to the Law of Definite Proportions, how do they combine?

In a simple ratio by volume at the same temperature and pressure. Signup and view all the answers

What do stoichiometric calculations help determine in a chemical reaction?

The amounts of reactants and products involved. Signup and view all the answers

Which statement about molar mass determination is accurate?

Molar mass is the sum of the atomic masses of all the atoms in a molecule. Signup and view all the answers

What is mass percent in a solution?

The mass of solute divided by the total mass of the solution, multiplied by 100. Signup and view all the answers

How do you calculate the concentration of a solution?

By dividing the mass of the solute by the volume of the solution. Signup and view all the answers