Unit 3(part 2) Moles

Round the molar mass of Potassium(K) to the nearest hundredth(2 decimal places)

How many atoms of iodine are in 1 mole of iodine?

• 53
• 63.55g
• 126.9
• 6.02 x 10²³

What is this a picture of?

• Bunsen Burner

• Beaker

• Graduated Cylinder

• Volumetric Flask

The number 6.02 x 10²³ is called (a)   , and it represents ​ (b)   .

• Molar Mass

• Bohr's number
• Planck's constant

• Avogadro's number
• the number of particles in 1 mole of a substance
• the mass in grams of 1 mole of any pure substance
• the number of particles in 1 gram of a substance

We use the periodic table to calculate...

• mass
• molar mass
• moles

Tags

NGSS.HS-PS1-7

Calculate the molar mass of C₂H₄O₂.

C = ​ (a)   *​ 2 =​ (b)  

H = 1.01 * 4 = 4.04

O = ​ (c)   * 2 =​ (d)  

C+H+O = (e)  

• 44.06g/mol
• 68.08g/mol

• 12.01g/mol
• 24.02g/mol
• 16.00g/mol
• 32.00g/mol
• 28.06g/mol
• 29.02g/mol
• 60.06g/mol

How do we get mass from moles?

• multiply by avogadro's number
• multiply by molar mass
• divide by avogadro's number
• divide by molar mass

Tags

NGSS.HS-PS1-7

What would be the mass of 1.5mol H₂O

• 24

• 27

• 32
• 18

Tags

NGSS.HS-PS1-7

Set up the equation to convert 0.75000 moles of (NH₄)₃PO₄ to mass:

​ (a)   * ​​ (b)   ​​= (c)  

​ (d)  

• 0.75000 mol
• 111.82 g
• 149.09 g
• 6.02 * 10^23 g
• 0.75000 g
• 1 g
• 1 atom
• 6.02 * 10^23 mol
• 1 mol

If I have 20.40 moles of NaCl, how many grams of NaCl do I have?

• 0.5490 g

• 112.0 g

• 1192 g
• 5077 g