Catalyst

1 / 20

# Catalyst - PowerPoint PPT Presentation

Catalyst. Wait for your test to get passed back. Then… 1. Write down one objective that you did well on 2. Write down the objective that you did the worst on 3. Correct at least one of your wrong answers (write the correct answer on your packet, not the test). Today’s Agenda.

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

## PowerPoint Slideshow about ' Catalyst' - tasya

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.

- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
Catalyst

Wait for your test to get passed back. Then…

• 1. Write down one objective that you did well on
• 2. Write down the objective that you did the worst on
But first!
• Unit 6: Stoichiometry
What is a dozen?

If I have 2 dozen bagels, how many is that?

Mole

Not this kind of mole…

A mole is = 6.02 x 1023 of something

Kind of like the way we use ‘dozen’ but way bigger.

Molar Mass

We use “dozen” as the measurement for eggs, and we use “moles” as the measurement for atoms.

Molar mass = Amount that 1 mole of something weighs.

If a dozen eggs weigh 1 lb., how much would 2 dozen eggs weigh?

A little bit of review

The subscript (small number) applies to the element directly before it and tells you how many of each element you have.

If there is no number, how many do we assume there are?

Ex. H2O

Molar Mass
• The “molar mass” of something is the mass of one mole of that thing. It is measured in g/mol
• Remember, the mass of each element is listed on the periodic table.
• We’ve called this “atomic mass”, we’ve called this “average atomic mass”, but now we’re calling it the “molar mass”. These are all the same thing.
• What is the molar mass for Fe?
• Cl?
• H?
Compounds
• The molar mass of a compound is calculated by multiplying the subscript by the mass of the element and adding the totals.
• What is the molar mass of H2O?
• CO2?
• CH4?
GUIDED PRACTICE! – 1o minutes
• I will display a compound on the board.
• You will then have 60 seconds to determine its molar mass.
• I will tell you when to show your boards
• Whiteboards!
• Expectations:
• Use the whiteboards only for Chemistry!
• No talking in between questions so that I can explain the answer
INDEPENDENT PRACTICE!
• Reminders:
• You should be working independently
• You should be working quietly
• Raise your hand for help and I will come over to you as soon as I can
Independent Practice

1. CaH2 7. Li3P

2. Ca(OH) 8. BF3

3. CH4 9. As2(NO3)

4. MgO 10. Ca(CO3)

5. CCl4

6. H2SO4

Exit Slip

1. How many atoms are in the compound H2(CO3)?

2. What is the molar mass of Nickel?

3. What is the molar mass of H2(CO3)?

4. What is the molar mass of NaCl?