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Oct 8th notes, Exams of Chemistry

Stanford UniversityChemistry

NOTES Part 1 molar mass and percent comp.notebook. 2. October 08, 2019. Sep 30-9:24 PM. 2. Write the formula for magnesium phosphate ...

Typology: Exams

2022/2023

Uploaded on 02/28/2023

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NOTES Part 1 molar mass and percent comp.notebook
1
October 08, 2019
Oct 1-9:14 AM
Pck p a unit calendar calculator 
Periodic Table
emnders
-dpuzzles this week:
% composition - due Thursday night
-uia quiz
uia 3.1 due Sun.
Dec 16-1:51 PM
Calculations with Compounds
molar mass and percent composition
Sep 26-11:30 AM



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
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
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
Sep 30-9:24 PM




 


 
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Download Oct 8th notes and more Exams Chemistry in PDF only on Docsity!

Oct 1-9:14 AM

PLck Xp a unit calendar calculator

Periodic Table

5emLnders

-(dpuzzles this week:

% composition - due Thursday night

-4uia quiz

4uia 3.1 due Sun.

Dec 16-1:51 PM Calculations with Compounds

molar mass and percent composition

Sep 26-11:30 AM

tŚĂƚŝƐĂŵŽůĞ͍

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Sep 30-9:24 PM

DŽůĂƌDĂƐƐ

dŚĞŵŽůĂƌŵĂƐƐŽĨĂĐŽŵƉŽƵŶĚŝƐƚŚĞŵĂƐƐŝŶ

ϭ͘ tƌŝƚĞƚŚĞĨŽƌŵƵůĂĨŽƌĂůƵŵŝŶƵŵŽdžŝĚĞ

Kͺͺͺͺͺͺͺͺͺͺͺ

Sep 30-9:24 PM

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ƚŚĞĐŽŵƉŽƵŶĚ͘ DŐͺͺͺͺͺͺͺͺͺͺ

Wͺͺͺͺͺͺͺͺͺͺͺͺ

Kͺͺͺͺͺͺͺͺͺͺͺͺ

Sep 30-9:27 PM EŽǁ͕ƚŽĮŶĚƚŚĞŵŽůĂƌŵĂƐƐŽĨĂĐŽŵƉŽƵŶĚŵƵůƟƉůLJ ƚŚĞŶƵŵďĞƌŽĨĂƚŽŵƐďLJƚŚĞĂǀĞƌĂŐĞŵĂƐƐĨŽƌĞĂĐŚ ŝƚĞŵ͘dŚĞŶĂĚĚĂůůƚŚĞĂǀĞƌĂŐĞŵĂƐƐƚŽƚĂůƐƚŽŐĞƚŚĞƌ͘ džĂŵƉůĞĨŽƌĂůƵŵŝŶƵŵŽdžŝĚĞͺͺͺͺͺͺͺͺͺͺͺͺͺͺ ůͺͺͺͺͺͺͺͺͺͺͺdžͺͺͺͺͺͺͺͺͺͺͺсͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ Kͺͺͺͺͺͺͺͺͺͺͺdžͺͺͺͺͺͺͺͺͺͺͺсͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ DŽůĂƌŵĂƐƐсͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ Sep 30-9:27 PM EŽǁLJŽƵƚƌLJŵĂŐŶĞƐŝƵŵƉŚŽƐƉŚĂƚĞͺͺͺͺͺͺͺͺͺͺͺͺͺͺ ůͺͺͺͺͺͺͺͺͺͺͺdžͺͺͺͺͺͺͺͺͺͺͺсͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ Wͺͺͺͺͺͺͺͺͺͺͺdžͺͺͺͺͺͺͺͺͺͺͺсͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ Kͺͺͺͺͺͺͺͺͺͺͺdžͺͺͺͺͺͺͺͺͺͺͺсͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ DŽůĂƌŵĂƐƐсͺͺͺͺͺͺͺͺͺͺͺͺͺͺͺ Nov 13-8:58 AM What if you take a test with 37 questions and you got 31 correct. How do you know what you made?

percent comp Al3+^ O2- Percent composition of a compound 2 atoms of aluminum each having a mass of 26. 3 atoms of oxygen each having a mass of 16. (2 x 26.98) + (3 x 16.00) = 101.96 grams Part Whole x 100% What is the percent composition of oxygen in aluminum oxide Al 2 O 3 Part Whole x 100% mass of oxygen = mass of formula = 101.96^ 48.00 x 100% aluminum oxide is 47.08% oxygen by mass Nov 16-10:56 AM Mg 3 (PO 4 ) 2 Mg: (3 x 24.31) + P: (2 x 30.97) + O: (8 x 16.00) = 262.87 grams What is the percent composition of magnesium in magnesium phosphate? Mg2+^ PO 4 3- mass of magnesium = 72. mass of the formula = 262.87 x 100% There is 27.74 % magnesium in the compound magnesium phosphate Sep 26-12:12 PM Nov 16-10:56 AM How many grams of oxygen in a 15.5 gram sample of aluminum oxide Al 2 O 3 Part Whole x Sample Size mass of oxygen = 48. mass of formula = 101. x 15.5 g There is 7.30 grams (3 sig figs) MM= 101.96 grams

Nov 16-10:56 AM Mg 3 (PO 4 ) 2 How may grams of magnesium can you isolate from a 122.32 gram sample of magnesium phosphate? mass of magnesium = 72. mass of the formula = 262.87 x 122.32 grams 33.936 grams of magnesium MM= 262.87 grams Nov 28-10:02 AM

How much oxygen can be liberated from the

decomposition of a 15.55 gram sample of KClO 3

K Oct 1-9:46 AM

% composition worksheet

Sep 11-4:48 PM

Sep 20-3:18 AM

Sep 20-3:18 AM

Sep 20-3:18 AM

Sep 20-3:19 AM

  1. Lron ,,, carbonate

Sep 20-3:19 AM

  1. sXlIXr trLo[Lde Sep 20-3:19 AM 8.^ copper ,,^ acetate Oct 1-9:47 AM Sep 30-9:01 PM