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.
Wait for your test to get passed back. Then…
If I have 2 dozen bagels, how many is that?
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.
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?
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?
1. CaH2 7. Li3P
2. Ca(OH) 8. BF3
3. CH4 9. As2(NO3)
4. MgO 10. Ca(CO3)
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?