CH07 – Moles

Dates

• P1 – Thursday, January 26th
• P3 – Wednesday, January 25th
• P5 – Friday, January 27th

Demo Recap – Did we have any fun?

• Produce a video that is less than 2 minutes in length
• speed-up / slow-down the recording (if necessary) to easily view “the chemistry”
• Overlay text that instructs the viewer on the chemistry of the demo
• Overlay with graphics (if necessary) to emphasize important parts of the demo
• Note: include names / class period in text
• It is OK to add a soundtrack / voice-over to add creative emphasis
• All videos are uploaded to a Castilleja YouTube account with public viewing access
• Post VideoLink to “Chemistry Honors” Schoology Group [LINK]
• Include student names and course period in Schoology post

Homework Review

• Unit practice
• Questions?

Quiz

• Quiz next class
• <syllabus for more details>
• Q1 = sig figures calculations
• Q2 = units conversion
• Quick quiz!
• Know these prefixes: Mega, kilo, centi, milli, micro, nano

New Idea!

New Material – Moles

• If I have ONE MOLE of a substance then I have a mass of that substance equal to the mass shown on the periodic table
• This is called: MOLAR MASS
• <molar mas is the mass of ONE mole>
• Example – one mole of cargbon atoms = 12.01 grams

How do we use this?

• Determine the mass of one mole of each of the following: aluminum, water, carbon dioxide
• Determine the number of atoms in a 25.3-gram sample of helium
• UNITS UNITS UNITS
• PROCESS PROCESS PROCESS

Homework

• Ch. 3 (52, 54, 56)
• SHOW EACH BLANK AS A SEPARATE PROBLEM