of substance mole mol Electric Current ampere A Luminous Intensity candela cd Prefixes for Units giga- G 109 mega- M 106 kilo- k 103 deci- d 10-1 centi- c 10-2 milli- m 10-3 micro- u 10-6 nano- n 10-9 pico- p 10-12 femto- f 10-15 atto- a 10-18 B. The mole and millimole 1. Mole – amount of a chemical species. Avogadro’s number 6.022 X 1023 of particles. 2. Millimole – 1mmol = 10-3 mol 3. Molar mass – mass in grams of one mole of a substance
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Name Mole Lab Exercises I. Pre Lab Questions Answer the following questions. (Hint: Your textbook will be helpful.) 1. ‘s number is the number of carbon atoms that are present in 12 g of 12C. 2. How many molecules of a compound are in one mole of that compound? 3. Write out the formula for finding percent by mass. 4. Write out the formula for finding Molarity. 5. The Formula Weight of a compound is equal to mole of that compound.
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1 mole of any substance can be defined as: Amount of a substance that contains as many particles (atoms‚ molecules or ions) as there are atoms in 12 g of the 12C isotope Avogadro number or Avogadro constant (NA); equal to 6.022 × 1023 particles Example − 1 mole of oxygen atoms = 6.022 × 1023 atoms 1 mole of carbon dioxide molecules = 6.022 × 1023 molecules 1 mole of sodium chloride = 6.022 × 1023 formula units of sodium chloride Molar mass of a substance can be defined as: Mass of one mole
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Mole Ratio of a Chemical Reaction: Copper & Silver Nitrate Lab #4 OBJECTIVE In this experiment‚ you will determine the number of moles of reactants and products present in the reaction of copper and silver nitrate‚ and calculate their mole-to-mole ratio. The mole-to-mole ratio relating to the disappearance of copper and the formation of silver metal will be used to write the balanced equation for the reaction. The reaction of copper metal with silver nitrate solution is a single
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I.Introduction Hydatidiform mole is a tumor that forms in the uterus as a mass of cystsresembling a bunch of grapes. Hydatidiform moles occur during the childbearing years‚ and they do not spread outside the uterus. However‚ a malignancy called choriocarcinoma may start from a hydatidiform mole. In its early stages‚ a hydatidiform mole may look like a normal pregnancy. Diagnosis is based on a history of lack of fetal movement‚ a pelvic examination‚ an ultrasound‚ and a blood test
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normal pregnancy progress into a pathological one. It is characterized by the presence of a hydatidiform mole‚ which the chorionic villi around the fetus degenerate and form clusters of fluid-filled sacs‚ resulting in tumor growth that forms in the uterus as a bunch of cysts resembling grape-like vesicles that are visible to the naked eye. Hydatidiform mole (also known as hydatid mole or mola hydatidosa) is type a gestational trophoblastic disease that results from over-production of the tissue
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WS 3.1 The Mole 1. Describe/relate the size of the mole to an everyday object. 2. What is Avogadro’s Number? 3. How many marbles are in a mole of marbles? 4. How many mosquitoes are in a mole of mosquitoes? WS 3.2 Molar Mass Find the molar mass of the following compounds: Show work and include units 1. CO2 2. 3. 4. 5. Fe2O3 6. 7. 8. 9. AgCl 10. 11. 12. 13. Ca3(PO4)2 14. 15. 16. 17. W3(PO3)5 18. 19. 20. 21. Fe(C2H3O2)2 22. 23. 24. 25. Calcium Carbonate 26. 27
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For those of you who came to the review in class today‚ The stoichiometry question from class. I read the answer to the wrong decimal place. --What is the total mass of oxygen in 0.26mol of Cu2O? Find the percent of oxygen in Cu2O first. The molar mass of Cu2O is 143‚ the mass of just the oxygen in it is 16. % Composition of oxygen would be 16/143 times 100 is 11.19%‚ To determine the mass of Cu2O in 0.26 mol‚ multiply by the molar mass of Cu2O. This gives
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I. INTRODUCTION Hydatidiform Mole (H-mole or Gestational trophoblastic disease) is abnormal proliferation and then degeneration of the trophoblastic villi (Garg & Giuntoli‚ 2007). As the cells degenerate‚ they become filled with fluid and appear as clear fluid-filled‚ grape-sized vesicles. The embryo fails to develop beyond a primitive start. Abnormal trophoblast cells must be identified because they are associated with choriocarcinoma‚ a rapidly metastasizing malignancy. (Pillitteri‚ 2010)
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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
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