The Mole Chemistry

What is the mole used for? 

• To measure the amount of grams in a substance
• To measure the amount of atoms or molecules in a substance
• To measure the amount of energy in a substance
• To measure the amount of bonding in a substance 

Tags

NGSS.HS-PS1-7

What is Avogadro's Number? 

• 6.02 x 10²³
• - 6.02 10²³
• 6.02 x 10²²
• 6,020,000,000,000

Tags

NGSS.HS-PS1-7

Avogadro's number of representative particles is equal to one_____.

• kilogram
• gram
• kelvin
• mole

Tags

NGSS.HS-PS1-7

A mole of Neon contains
6.02 x 10²³ _____.

• atoms
• formula units
• ions
• molecules

The molar mass of an element is the mass of one ____ of the element.

• atom
• molecule
• mole
• gram

What is the molar mass of one mole of Nitrogen N₂?

• 14.01 amu

• 14.01 g

• 28.02 g

• 28.02 amu

Tags

NGSS.HS-PS1-7

What is the molar mass of Carbon Dioxide (CO₂)?

• 12 amu
• 12 g
• 44 g
• 44 amu

What is the molecular formula if the empirical formula is C₂H₅ and the molecular molar mass is 58.14 g/mol?

• C₂H₅
• C₄H₁₀
• C₁H_2.5
• C₄H₈

Find the percent composition of N₂S₂.

• N: 69.6%  S: 30.4%
• N:36% S: 75.6%
• N: 96.6% S: 3.4%
• N: 30.4% S: 69.6%

T/F
If 2 compounds have the same empirical formula, they are the same (same properties, structure, etc.)

• True
• False