Particles and Moles

When you are solving for molecules, atoms, and particles you always use what number?

• 6.02 X 10²³

• Lucky 7

• Guess

• 24

Tags

NGSS.HS-PS1-7

How many molecules are in 27.5 grams of NaOH

• 41.4 molecules

• 4.14 x 10²³ molecules

• 4.14 x 10²⁵ molecules

• 1.83 x 10^-21 molecules

How many moles are in 2.85 x 10¹⁸ atoms of iron, Fe?

• 41.4 molecules

• 4.14 x 10²³ molecules

• 4.14 x 10²⁵ molecules

• 1.83 x 10^-21 molecules

How many moles are in 3.01 x 10²² atoms of magnesium, Mg?

• 0.05 moles

• 1.81 X 10⁴⁶ moles

• 5.00 x 10²¹ moles

• 5 moles

There are (a)   molecules in .5 moles of N₂O₅.

• 1.2 x 10²³ molecules

• 3.01 x 10²³ molecules

• 6.02 x 10²³ molecules

• 5.4 x 10²³ molecules

Match the following

• 6.02 x 10²³

• Avogadro's Number

• The mass of one mole of substance (g/mol)

• STP

• 0^oC and 1 atm

• Molar Mass

• An atom, molecule, or formula unit

• Molar Volume

• The space occupied by 1 mole of a substance @ STP (22.4L)

• Representative Particle

How many Mg atoms are present in 3.00 moles of MgCl2?

• 81 x 10^24

• 3.02 x 10^24

• 12.0 x 10^25

• 16.0 x 10^23

How many Mg atoms are present in 3.00 moles of MgCl2?

• 81 x 10^24

• 3.02 x 10^24

• 12.0 x 10^25

• 16.0 x 10^23

How many atoms are in 6.5 moles of zinc, Zn?

• 4.2 atoms

• 3.91 X 10^-24 atoms

• 3.91 x 10²⁴ atoms

• 5 x 10²⁴ atoms

If you have moles on top, what do you need on the bottom of the conversion factor to be?

• atoms

• particles

• grams

• moles