Chapter Three General Chemistry 2024

Front

How many grams are in 2.4 mol of sulfur?

Back

6.2 x 10^2 g

Front

How many particles are in a mole?

Back

6.02 x 10^23

Front

In Dalton's Atomic Theory, all elements consist of __________ that cannot be divided.

Back

Atoms

Front

Who discovered that the atom has a small, dense, positively charged nucleus?

Back

Ernest Rutherford

Front

How did Thomson build upon Dalton's model?

Back

He discovered subatomic particles (electrons).

Front

What is the molar mass of sulfur (S)?

Back

32.07 g/mol

Front

What is Avogadro's number?

Back

6.02 x 10^23 particles/mol

Front

What is the significance of Dalton's Atomic Theory?

Back

It established that matter is made of atoms, which are indivisible and combine in fixed ratios.

Front

What did J.J. Thomson discover?

Back

The electron, a negatively charged subatomic particle.

Front

What is the formula to calculate the number of moles?

Back

Number of moles = mass (g) / molar mass (g/mol)