Warmup 3-4 The Mole

Tuesday 3-2

What was the best and worst part of your weekend?

Why did chemists create the mole?

• Because moles are small animals that help chemists dig for elements in the ground.

• So that chemistry students would have an extra unit to memorize and make their homework harder.

• To measure the number of atoms in a single grain of sand because scientists thought counting atoms individually was too easy.

• Because atoms are so small you need huge amounts in order to weigh them.

How many particles are in a mole?

• 6.02 x 10²³

• 12

• 600 million

• 6.02

Tags

NGSS.HS-PS1-7

The molar mass of an element is the mass in ______ of 1 mole (6.02 X 10²³) of an element.

• grams

• ounces

• pounds

• AMU

What tells us the molar mass of an element?

• the size of the element

• the atomic number

• the atomic mass

• the color of the element

Match the following elements to their molar mass

• 16

• H

• 56

• N

• 40

• Ca

• 14

• Fe

• 1

• O