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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eye is to be one of the fastest hunters of prey on Earth. The twenty two fleshy tentacles attached to the nose of the Star-nosed Mole are incredibly sensitive to touch and aid the mole in capturing prey. Just how beneficial is the snout of a Star-nosed Mole exactly? They could touch a pin head with their nose six hundred times at once. Crazy enough in a single day‚ this mole can consume up to its own body weight in worms and insects. They as well dig tunnels underground and are a valuable aspect to
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CHM 266‚ Section 55 Shanel Warren Tiffany‚ Princess‚ and Wei October 2‚ 2013 Determining the Mole Ratios in a Chemical Reaction Introduction The purpose of this lab was to determine the mole ratios of the reactants hypochlorite ion (OCI ) and thiosulfate (S O ) when reacted in a chemical reaction. A chemical equation gives the mole ratios of the reactants and products involved in the chemical reaction. When some formulas of the products are not known‚ experimental measurements
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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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Finding the Ratio of Moles of Reactants in a Chemical Reaction Purpose: The goal of the lab is to determine the mole ratio of two reactants in a chemical reaction (AgNO3 and K2CrO4). However‚ the formulas for the products are unknown. Introduction: When determining the molar ratio of a chemical equation‚ usually the formulas of the reactants and the products are known. With that information‚ it is particularly easy to determine the ratio. However‚ since the products and the formulas for
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CuSO4.H2O‚ we need to find the ratio of mole between anhydrous copper II sulfate and the water vapour by using the formula: In this case‚ the molar mass of: Copper II sulfate (CuSO4) is: 63.55 + 32.06 + 15.99 x 4 = 159.57 g/mol Water (H2O) is: 1.01 x 2 + 15.99 = 18.01 g/mol (e.g. 0.37/18.01= 0.02054 mol.) Then‚ is obtained by: Calculation 1st attempt 2nd attempt 3rd attempt Mole of water (mol) = 0.06163 Mole of anhydrous copper sulfate (CuSO4) (mol)
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Egil M 18.12 1 How Many Moles in my Name? Purpose The purpose of this experiment is to see how many moles there are in my name when writing with a chalk stick. I will attempt to see how little of the chalk I can use and still see my name clearly. Research question How do we calculate moles? How might we manipulate the variables? Theory So if I am going to find out how many moles there are in my name I have to know how to work it out. The «Mole» is a unit of measurement‚ just like a dozen or
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MOLE UNIT REVIEW WORKSHEET 1. Convert 500.0 g NaCl to formula units. 5.15 x 1024 f.u. Convert 9.8 x 1024 molecules of C2H6 to grams. 4.9 x 102 g The mass of an unknown gas is 11.59 g. The mass of an equal volume of He is 1.45 g. Calculate the molar mass of the unknown gas. 32.0 g/mol Calculate the percentage composition of sulphur in Al2(SO4)3. 28.11% Calculate the molar mass of Co2(SO4)3•6H2O 514.16 g/mol The empirical formula for a compound is C2H5O and its molecular mass
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probably they too) have grown tired of the same food items on the menu: burgers‚ brats‚ and the occasional delivery pizza. You want to do something different and why not? If you are stumped on ideas‚ shake it up and try cooking authentic Mexican food. Mole is one of the most traditional dishes from our neighbors to the south and is a delicious place to start when deciding between Mexican recipes. It is a sauce that is widely considered to be difficult to prepare if you are not native to Mexico. But don’t
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there are unfortunate couples that can’t have even one. If the woman is pregnant everyone is very excited towards the baby especially the father. But what if the baby in your womb that you thought you has is not actually a real one; but a cluster of H-mole. The fetus or developing baby‚ the placenta (or after-birth)‚ which has many functions including the feeding of the baby and the removal of its waste products. The placenta is made of millions of cells called trophoblasts. These two parts normally
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