Moles-Particles

Front

What is Avogadro's number?

Back

Avogadro's number is 6.02 x 10^23, which is the number of particles (atoms, molecules, etc.) in one mole of a substance.

Front

How many atoms are in 1 mole of any substance?

Back

1 mole of any substance contains 6.02 x 10^23 particles (atoms, molecules, etc.).

Front

How do you calculate the number of atoms in moles of a compound?

Back

Multiply the number of moles by Avogadro's number and then multiply by the number of atoms in the formula.

Front

What is the total number of atoms in 2.5 moles of NaCl?

Back

3.01 x 10^24 atoms (2.5 moles x 6.02 x 10^23 particles/mole x 2 atoms per formula unit).

Front

If you have 5 moles of Cl2, how many molecules do you have?

Back

5 moles of Cl2 contains 3.01 x 10^24 molecules (5 moles x 6.02 x 10^23 molecules/mole).

Front

True or False: 1 mole of O2 has the same number of molecules as 1 mole of Cl2.

Back

True.

Front

What is the relationship between moles and particles?

Back

Moles are a measure of quantity, and 1 mole corresponds to 6.02 x 10^23 particles.

Front

How many moles are in 1.91 x 10^25 students?

Back

31.8 moles (1.91 x 10^25 students ÷ 6.02 x 10^23 students/mole).

Front

What is the formula to convert moles to particles?

Back

Number of particles = Number of moles x Avogadro's number.

Front

How many molecules are in 9.4 moles of AlCl3?

Back

2.26 x 10^25 molecules (9.4 moles x 6.02 x 10^23 particles/mole).