Moles

What is Avogadro's Number? 

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

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

What can be determined from a balanced chemical equation?

• Mole ratio of any two substances in the reaction
• Energy released in the reaction.
• Electron configuration of all elements in the reaction. 
• Mechanism involved in the reaction. 

Tags

NGSS.HS-PS1-7

Where do you look to calculate the molar mass?

• avogadros number
• periodic table 

What is the molar mass of one molecule 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

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%

How many moles of carbon atoms are there in 5g of carbon?

• 60 mol
• 17 mol
• 0.42 mol
• 7 mol

Tags

NGSS.HS-PS1-7

Find the mass in grams of 0.75 moles of magnesium (Mg).

• 32 grams
• 18 grams
• 2.21 x 10 ^23 grams