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2.20.15 Pick up turned back papers. Pick up sock and board. Do Now Follow the link or qr to warmup – you have – you have until 5 minutes after the bell http://bit.ly/1LimEIQ

Today is February 20, 2015 Topic: The Mole Lesson Objectives: SWBAT 2.2.4 Analyze Stoichiometric relatioships inherent in a chemical reaction 2.2.5 Analyze quantitatively the composition of a substance (empirical formula, molecular formula, percent composition, and hydrates) Essential Question: 2.2 Analyze chemical reactions in terms of quantities, product formation, and energy.

Homework 2-20 Find HW on google classroom

IMPORTANT DATES Monday 2/23 – Quiz Tuesday 2/24 – Tutoring 2:30-3:30 Wednesday 2/25 – Chemical Reaction Retest Thursday 2/26 – Tutoring 2:30-3:30 Friday 2/27 – Lab/ Quiz

Agenda 2-20 Do Now Google Classroom recap Mole Conversions Review Mole Conversions foldable Puzzle Wrap Up

Google Classroom you MUST USE YOUR GAGGLE EMAIL ONLY !! Go to the GOOGLE login page Use the following username and password: Username: firstinitial + last name + last four of student ID @cms.gaggle.net Password: Birthday YYMMDD Then in that google page search Google Classroom, click the first link.

Google Classroom you MUST USE YOUR GAGGLE EMAIL ONLY!! If you have not joined the class join by selecting that you are a student. Then click the plus sign in the upper right hand corner to enter a code. Codes: 1st block – klcajn 2nd block – ot0ok37 4th block – 5m3uvc

TOTD 2/19

Review of Formula Mass

Review of Gram – Moles and Moles – gram

Calculations with Moles: Using Avogadro’s Number How many atoms of lithium are in 3.50 moles of lithium? 3.50 mol 6.02 x 1023 atoms = atoms 2.07 x 1024 1 mol

Calculations with Moles: Using Avogadro’s Number How many atoms of lithium are in 18.2 g of lithium? 18.2 g Li 1 mol Li 6.022 x 1023 atoms Li 6.94 g Li 1 mol Li (18.2)(6.022 x 1023)/6.94 = atoms Li 1.58 x 1024

M.4.2.1

M How many grams are in 1.505x10^23 molecules of NaCl ?

4 How many atoms are in 21 grams of Lithium?

2 How many grams are in 1.204 x 10^24 atoms of water ?

1 How many molecules are in 66 grams of Aluminum Chloride ? (remember to find the charges and criss cross when writing formula!)

Puzzle Wrap Up