Warm Ups- The Mole January 10-January 20.

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Presentation transcript:

Warm Ups- The Mole January 10-January 20

Tuesday, January 10, 2017 Each school year is 180 days. You are in school 430 minutes per day. How many hours will you spend in class at Lakeside High per school year? We will assume you have perfect attendance.

Wednesday, January 11, 2017 Calculate the Molar Mass of Calcium phosphate, Ca3(PO4)2? How many moles are there in 5.64 x 1024 formula units of Calcium chloride, CaCl2?

Homework Check Tuesday Night 1/10/2017 Atoms to Moles Conversions a) 40.00 g/mol c) 18.02 g/mol b) 58.44 g/mol d) 95.21 g/mol a) 1.66 x 1024 atoms Al b) 2.18 x 1024 formula units NaCl a) 2.49 x 10-12 mol Pb b) 6.06 mol H2O

Thursday, January 12, 2017 -How many grams are in 3.67 moles of BaCl2? -How many moles are in 118.5 grams of Mg3(PO4)2?

Friday, January 13, 2017 -How many grams are in 7.89 x 1022 molecules of H2O?

Tuesday, January 17, 2017 -How many formula units are in 265.8 g of Ba3(PO4)2?

Wednesday, January 18, 2017 Determine the empirical formula for the compound whose percent composition is shown below.

Homework Check Tuesday Night 1/17/2017 % Composition: 32.37 % Na CO(NH2)2:: 46.65 % N, 6.73% H NH3: 82.22% N, 17.78% H 35.00% N, 59.96% O 56.22% Ba, 29.03% Cl, 14.75% H2O 66.71% C, 11.03% Cu, 2.81% H, 19.45 % N 51.17% H2O 69.94% Fe, 30.06% O 93.10 % Ag, 6.90% O 28.71% K, 0.74% H, 23.55 % S, 47.00% O Empirical Formula: Na2S Fe2S3 P2O5 Na2SO3 FeS Na2SO4 K2Cr2O7 CaBr2 PbC8H20

Thursday, January 19, 2017 A compound was found to contain 49.98 g of carbon and 10.47 g of hydrogen. The molar mass of the compound is 58.12 g/mol. Determine the molecular formula.

Homework Check Wednesday Night 1/18/2017 Molecular Formula: P4O10 H2O2 O3C3N3Cl3 N2O5 N2H4

Friday, January 20, 2017 Analysis of a chemical used in photographic developing fluid yielded the percent composition data shown in the circle graph. If the chemical’s molar mass is 110.0 g/mol, what is its molecular formula?