Chemistry

A reaction starts with 20.0 grams of lithium hydroxide (LiOH) and produces 31.0 grams of lithium chloride (LiCl), what is the percent yield of lithium chloride (LiCl)? *LiOH + KCl - LiCl + KOHA) 64.5%B) 88.6%C) 81.5%D) 92.8%
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what is the molarity of 2.3 mol of Kl dissolved in 0.5 L of water
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All chemicals pollute the environment.TrueFalse
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A student dissolves 20g of potassium chloride in 100cm of water in a beaker. What is the concentration of the solution in g/dm?
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If is known how deep the water table in an area is, it is known how deep to dig to reach PoresThe unsaturated zoneSolid rock Groundwater
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5.00 moles of oxygen gas and 2.00 moles of carbon dioxide are mixed inan evacuated jar of volume 4.00 liters and temperature of 200 K.What isthe partial pressure of carbon dioxide (R = 0.0821 L'atm/mol K) Assume noreaction occurs between oxygen and carbon dioxide. *A) 2.45 atmB) 2.98 atmC) 5.33 atmD) 8.21 atm
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Which is the control center for the endrocrine system?
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A student observes the chemical process described by this equation:4Al + 3O2 2Al2O3How does the mass of the new substance compare to the total mass of the starting materials?
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Assuming a car (with a 70-L) gas tank can hold approximately 50,000 (5.00 * 10^4) g of octane(C8H18) or 50,000 (5.00 * 10^4) g of ethanol (C2H6O). How much carbon dioxide (CO2), in grams, is produced in one tank of gas from the combustion of each amount?
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If the temperature of a gas decreases at constant volume which of the following would occur
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What was the purpose of the Apollo space missions?to collect rock samples from Marsto land on Saturnto collect rock samples from the moonto land on Jupiter
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A student investigates a pure metal, X. The student takes a 100.0 g piece of metal X, heats itto 500.0C, then places it on a 1000.0 g block of ice at 0.0C. The ice partially melts, andthe final temperature of the metal, ice, and melted water is 0.0C. The student calculates theexperimental value of the specific heat capacity of metal X and records it as0.90 J/(g C).(C) Calculate the magnitude of the energy change of metal X during the experiment.(d) Calculate the mass of ice melted by metal X. (The enthalpy of fusion of ice is 330J/g.(e) A student claims that the energy transferred to the ice breaks the polar-covalent O-Hbonds found between atoms within water molecules. Do you agree or disagree with thisclaim? Justify your answer.
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Which species acts exclusively as spectator ions in this reaction
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What name is given to any chemical which increase the rate of a chemical reaction
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How to find the valency of iron
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The pressure of a gas is 100.0 kPa and its volume is 500.0 mL. If the volume increases to 1,000.0 mL, what is the new pressure of the gas?
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Blast furnaces extra pure iron from the Iron(IIl)oxide in iron ore in a two step sequence. In the first step, carbon and oxygen react to form carbon monoxide:2C(s)+O2(g) arrow 2CO(g)In the second step, iron(lll) oxide and carbon monoxide react to form Iron and carbon dioxide:Fe203(s) + 3CO(g) arrow 2Fe(s)+ 3CO2(g)Suppose the yield of the first step is 71.% and the yield of the second step is 72.%. Calculate the mass of oxygen required to make 7.0 kg of iron.Be sure your answer has a unit symbol, if needed, and is rounded to 2 significant digits.
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CAN SOMEONE HELP PLS!!!
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Can someone answer these questions for me please?15. Use bond energies to determine the H for the combustion of methane (CH).16. Use Hess's law to determine the H for the combustion of liquid methanol (CHOH).17. Using your answers from question 16, how much energy will you get from burning 245.0 g of methanol in excess oxygen?18. The S is 209.6 J/K for the following reaction:CH (g) + 3O (g) 2CO (g) + 2HO (g) What is the absolute entropy of O (g)?19. What is G for the following reaction at 298 K?2CH (l) + 150 (g) 12CO (g) + 6HO (g)20. If a reaction has a H of -120.0 kj/mole and is spontaneous for all temperatures less than 200.0 K, what is S?
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What are all of the possible products of the electrolysis of Sodium Chloride in aqueous solution of water when the electrodes are made of copper? A photo has been provided to show what is happening
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Have scientists found any reliable predictors for earthquakes, like radon gas release or weird animal behavior?
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Please help!!! Will give BRAINLIEST to right answer!!
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What happens when light passes from air into water?A) The light speeds upB) The light continues at the same speedC) The light slows downD) The light forms a mirage
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What is it called rocks are broken in smaller pieces
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