1 AND 2 STEP MOLE CONVERSIONS – MORE PRACTICE
1. How many moles does 80.0 grams of H2O represent?
2. How many moles does 45.0 grams of C6H12O6 represent?
3. How many moles does 22.0 grams of CO2 represent?
4. How many moles does 56.0 grams of N2 represent?
5. What is the mass of 2.0 moles of LiOH ?
6. What is the mass of 5.0 moles of Ba(CN)2 ?
7. What is the mass of 3.5 moles of water?
8. What is the mass of 0.75 moles of CuSO4 ?
9. How many atoms does 2.0 moles of He represent?
10. How many sodium ions are in 3.0 moles of NaCl?
11. How many molecules are in 0.25 moles of CH4?
12. How many total atoms are in 8.0 moleS of H2O ?
13. How many moles of water does 6.02 x 1023 molecules represent? 14. Convert 3.01 x 1023 molecules of C2H6 to moles.
15. How many moles of C6H12O6 does 1.2 x 1024 molecules represent? 16. How many moles of CaCl2 does 2.41 x 1024 formula units represent? 17. What would be the mass of 1.20 x 1024 molecules of H20?

18. What would be the mass of 2.41 x 1024 formula units of Ba(OH)2? 19. How much mass does 1.51 x 1022 atoms of Ne represent?
20. How much mass does 7.53 x 1022 molecules of CH4 represent? 21. How many molecules does 36.0 grams of H20 represent?
22. How many molecules does 11.0 grams of CO2 represent?
23. How many atoms does 3.0 grams of carbon represent?
24. How many formula units does 200.0 grams of CaCO3 represent?

...SHORT COMMUNICATION
Journal of Oral Health
&
Community Dentistry
Inverted and Impacted Third Molar
Ramesh Chandra1, Ambrish Kaushal2
ABSTRACT
A case of unilateral impacted and inverted third molar has been reported. Its management should be performed in the conservative way
to avoid conservative way to avoid serious consequences.
Keywords: Inverted, Impacted, Third molar
1
Reader
Department of Conservative
Dentistry and Endodontics
Career Post...

...Note taking and note making is one of the most fundamental and important tasks that students must do. It cannot be doubted that a student that takes notes during lectures is more likely to achieve a higher grade compared to a student that does not. However, note taking might not have the positive effect the student wants if it is not done properly. “What to note down, how much to note down and how detailed the...

...10-3 mol
3. Molar mass – mass in grams of one mole of a substance.
Example 3-5 page 76
4.62 g Na3PO4
Molar Mass Na3PO4 = (22.9898 gNa X 3) + (30.9738 gP) + (15.9994 gO X4) = 163.9408 g per mol Na3PO4
Moles Na3PO4 = 4.62 g X 163.9408 g/ mol = 2.818 X 10-2 mol Na3PO4
Moles Na = 2.818 X 10-2 mol Na3PO4 X 3 mol Na / mol Na3PO4 = 8.45 X 10-2 mol Na
Na+ ions = 8.45 X 10-2 mol Na X (6.022 X 1023) = 5.08 X 1022 ions
C. Solutions and Their...

...Determining the value of molar mass of chosen compound
Marta Dürrigl 1mmA
Chemical reaction:
b.) CaCO3 (s) + 2HCl (aq) ----------- CaCl2 (aq) + CO2 (g) + H2O(l)
AIM:
The aim of this investigation is to experimentally determine the molar mass of carbon dioxide (CO2) by measuring its volume and calculating its mass.
CO2 which we will measure will arise as a product of a chemical reaction between Calcium Carbonate (CaCO3) and Hydrochloric...

...Christina Park
2/14/12 pd.3
Chapter 11 Notes
I. Measuring Matter
A. Counting Particles
number of unit for counting is always constant.
a. What is a mole?
mole (mol): the SI unit used to measure the amount of a substance, number of representative particles.
representative particle: any kind of particle such as atoms, molecules, formula units, electrons, or ions.
Avogadro's number: 6.022 136 7 x 10²³, volume of one mole of a gas determined by Amedeo...

...JOURNAL – NOTE TAKING AND UNIVERSITY STUDENTS WITH LEARNING DIFFICULTIES : WHAT SUPPORTS ARE NEEDED? (Ann Maydosz and Sharon A Raver, Old Dominion University)
Lecture notes play an important role in preparing for examinations, as it may ensure the success of students. Many students do not have adequate note-taking skills, and this contribute a lot to the creation of incomplete and unrelated notes (Kiewra, 2002). Researchers...

...Should a Student Take Notes During College?
When students reach college-level academics, note taking becomes a major role in the effective learning of college students. Studies have shown that effective note taking results in higher academic grades. There are a high number of students in colleges today that are receiving poor grades due to failing tests or quizzes over material that was taught to them but not remembered. The vast majority of...

... Taking notes during lectures is very beneficial to students in a number of ways. One, which is to remember and it will save student time relying on memory later on. You can be an amazing listener, but unless you have good note taking skills, it will be hard for you to remember what the teacher said in previous lectures. For notes to become useful, they should be well structured and you can go through them over and over so that the information remains...