Avogadro's Number

How many formula units are in 315g of zinc perchlorate?

• 1.19

• 1.1919

• 7.18x10²³

• 7.18x10²⁵

Avogadro’s number is:

• 6.02 x 10²²

• 6

• 6.02 x 10²³

• 3.01 x 10²³

How many molecules are in 2.5 mol of NaCl?

• 51x10²³

• 146

• 4.15

• 1.51x10²⁴

How many atoms of carbon are in 6.00g of carbon?

• 20x10²⁴atoms C

• 6.02x10²³atoms C

• 3.01x10²³atoms C

• 1.50x10²³atoms C

To change mass to atoms, how many conversion factors would need to be used?

• 2

• 3

• 1

• 5

Tags

NGSS.HS-PS1-7

How many atoms are in 9.44 moles of Al?

• 5.68 atomsAl

• 5.68x10²⁴ atoms Al

• 0.705 atoms Al

• 1.25x10²³ atoms Al

How many moles are 2.85 x 10¹⁸ atoms of iron?

• 4.73 x 10^-6 moles

• 1.72 x 10⁴² moles

• 1.72 x 10^-42 moles

• 4.73 x 10⁶ moles

What is a mole in chemistry?

• A small furry creature that digs holes in the ground

• A growth on your aunt's face with hairs sticking out of it

• A concept used to count extremely small particles in chemistry

• A unit of measurement for weight

Who first proposed the idea of the mole?

• Lorenzo Romano Amedeo Carlo Avogadro

• Albert Einstein

• Isaac Newton

• Marie Curie

What is the size of a mole of water?

• 18.01 grams

• 18.01 milliliters

• 602 sextillion molecules

• All of the above