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Moles /Number of Particles Conversion
Convert to Moles
2.03X1022 atoms of lithium, Li
1.75 X1025 Formula Units of Sodium Chloride, NaCl
8.76X1021 molecules of H2O
4.01X1015 molecules of methane, CH4
4.27 X 1024 molecules of H2SO4
3.11 X 1024 atoms of Pb
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- Molar Mass Representative Particle Mass Number of Substance Number of moles (gimol) (9) Particles Carbon dioxide (CO2) 44.01 molecule 2.5 1.505 x10 Gold (Au) atom 197.00 1 6.02 x10 Glucose (C:H»Os) 180.18 molecule 360.36 1.25x102 Calcium Fluonde (CafFa) 78.08 formula unit 234 24 3 Nitrogen gas (Na) 28.02 mloecule 140.10 3.010 x10Complete the following table for citric acid acid, C6H8O7, the acid found in many citrus fruits. No. of grams No. of moles No. of molecules No. of atoms 0.1364 1.234 4.32 x 10 24 5.55 x 10 19For the following questions (Q1-Q4), consider the compound CoCl2 • 6H2O (cobalt (II) chloride hexahydrate) which comes as beautiful red-purple crystals. Katie weighs out 2.51 g of the CoCl2 • 6H2O compound on the balance for her experiment. Q1. Determine the molar mass of CoCl2 • 6H2O compound. Q2. Convert 2.51 g of the CoCl2 • 6H2O to moles. Q3. Katie heats her hydrate to remove the water and obtain the anhydrous cobalt (II) compound CoCl2. Her results are below. Complete Katie’s data table of experimental results. Mass of dry crucible + lid 42.37 g Mass of dry crucible + lid + CoCl2 • 6H2O (hydrate) 44.88 g Mass of CoCl2 • 6H2O 2.51 g Mass of crucible + lid + CoCl2 (after heating) 43.79 g Mass of CoCl2 (anhydrous) g Mass of water removed g Molar mass of water 18.02 g/mol Molar mass of CoCl2 129.84 g/mol Moles of H2O mol Moles of CoCl2 mol Molar ratio of water to CoCl2 (experimental) Molar ratio of water…
- O 5.62 x 10 25 NaCl O 58.44 NaCI 0 0.282 NaCI O 1.70 x 1023 NaCl QUESTION 6 Convert 2.09 moles NaOH to grams. O 174 grams NaOH O 83 6 grams NaOH O2 grams NAOH 0.0523 grams NaOH QUESTION 7 Convert 4 80 x 104 molecules of Hy0, to moles H202. 0.00797 moles H202 .0.363 moles Hy02 6.022 x 105 4 oles H202The chemical formula for hydrogen bromide is HBr. A chemist determined by measurements that 0.030 moles of hydrogen bromide participate in a chemical reaction. Calculate the mass of hydrogen bromide that participates. Round your answer to 2 significant digits. 0 g x10 × ŚChocolate Chunk Raisin Oatmeal Cookies Recipe Ingredients1.806 x 1023 molecules white sugar 1 1/5 cups packed brown sugar 3⁄4 cup butter (stick) OR margarine 0.031 moles vanilla 1 large egg 1⁄4 cup milk 1/3 tsp table salt 2.408 x 1022 formula units baking soda 1 tsp cinnamon 1.10 moles all-purpose flour 1 cup raisins (optional) 3 cups oatmeal (quick or old fashioned) (optional) 1 cup coarsely chopped semi-sweet chocolate or chocolate morsels Instructions: A. Measure appropriate length of butter and soften. B. Preheat the oven to 450 K. C. Beat the butter, brown and white sugar, milk, vanilla andeggs until light and fluffy. C. In a separate bowl sift the flour,baking soda, cinnamon and salt. D. Gradually add the flour mixture into the creamy mixture while beating. E. Stir in oatmeal, raisins and chocolate chips into the dough. F. Place spoonfuls of dough on the cookie sheet and bake for 12 to 15 minutes. Cool on a rack or tray. G. Once cookies are cooled, you may decorate them with…
- A student is trying to figure out how many moles of potassium chloride are made from 4.0 grams of chlorine gas. Which step in the student's work below is incorrect? 2 K+ Clh →2 KCI 4. 0 g Cl2 1 moles Cl2 70.915 g Cl2 1 moles KCl 1 2 moles Cl2 Step 1 Step 2 Step 3How many moles (of molecules or formula units) are in each sample? 19.3 g NO2 Express your answer to three significant figures and include the appropriate units. 1.19 kg CO2 Express your answer to three significant figures and include the appropriate units. 31.5 g KNO3 Express your answer to three significant figures and include the appropriate units. 182.5 kg Na2SO4 Express your answer to four significant figures and include the appropriate units.This is the chemical formula for talc (the main ingredient in talcum powder): Mg, (Si₂O₁), (OH)₂ An analytical chemist has determined by measurements that there are 29. moles of silicon in a sample of talc. How many moles of hydrogen are in the sample? Be sure your answer has the correct number of significant digits. mol 0.8
- This is the chemical formula for talc (the main ingredient in talcum powder): Mg3 (Si₂05), (OH)2 An analytical chemist has determined by measurements that there are 67.8 moles of magnesium in a sample of talc. How many moles of silicon are in the sample? Round your answer to 3 significant digits. mol 0How many molecules of carbon monoxide, CO, are there in 7.59 moles of carbon monoxide? Enter a number. Watch your sig figs! Enter scientific notation like this: 1.8 x 108 is entered as: 1.8e+8 5.3 x 10-4 is entered as: 5.3e-4Dinitrogen oxide (or nitrous oxide), N2O, also known as laughing gas, is widely used as an anesthetic in dentistry. How many grams are in 1.50 moles of dinitrogen oxide? Express your answer with the appropriate units. How many moles are in 29.0 g of dinitrogen oxide? Express your answer with the appropriate units.