01-17Quiz

15 dozen roses is how many roses?

• 15 roses

• 22 roses

• 12 roses

• 180 roses

If you have 228 pencils and start grouping them into dozens, how many dozens will you have?

• 15 dozen

• 19 dozen

• 22 dozen

• 24 dozen

1 mole = 6.02e23. How many pencils do I have if I have 4.5 moles of pencils?

• A lot

• 2.7e24 pencils

• 4.5e18 pencils

• 2.34e30 pencils.

1 mole = 6.02e23. How many pencils do I have if I have 4.5 moles of pencils?

• A lot

• 2.7e24 pencils

• 4.5e18 pencils

• 2.34e30 pencils.

In chemistry, a "mole" is:

• The mass of an atom
• a large number used to count particles
• based on the volume of a substance

How many atoms of iodine are in a mole of iodine?

• 53
• 63.55g
• 126.9
• 6.02 x 10²³

The number 6.02 x 10²³ is called...

• Obama's number
• Bohr's number
• Trump's number
• Avogadro's number

Tags

NGSS.HS-PS1-7

How many particles would be in 8.4 moles of Octane (C₈H₁₈)?

• 5.77 x 10²³
• 5.04 x 10²⁴
• 5.77 x 10²⁶
• 5.04 x 10²³

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

Which list of number of atoms in Mg(NO2)₂ is right?

• Mg : 1--NO :  2
  
• Mg : 1-- N :  6--O:  2
  
• Mg :  1-- N:   1--  O: 2
  
• Mg :  1-- N: 2--  O: 4
  

Tags

NGSS.MS-PS1-1