Chemistry

were the reactions in part c endothermic or exothermic? how did you know that the reactions were endothermic or exothermic? why was it necessary to use two different concentrations of hcl in the reactions?
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2.37-l container is filled with 186 g argon. (a) if the pressure is 10.0 atm, what is the temperature? webassign will check your answer for the correct number of significant figures. k (b) if the temperature is 225 k, what is the pressure?
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A student lifts a book from a desk.How does the books energy change?A. gains kinetic energyB. gravitational potential energy increasesC. potential energy decreasesD. potential energy converted to kinetic energy
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If a car tire containing 5.61-L of gas at 29.68oC and 792.04-mmHg is driven high into the mountains where at altitude there is a pressure of 736.41-mmHg and the temperature is 7.35oC, its volume there is:If a car tire containing 5.61-L of gas at 29.68oC and 792.04-mmHg is driven high into the mountains where at altitude there is a pressure of 736.41-mmHg and the temperature is 7.35oC, its volume there is:
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what is the concentration of a 53.65 ml solution of hbr that is completely titrated by 33.50 ml of a 0.200 m naoh solution?
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Explain how entropy would change in the process of flambeing (combustion of ethanol)
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why is it important to monitor the temperature of the oil prior to adding the potassium methoxide solution
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In the combustion reaction 2C2H6 +7O2 4CO2 + 6H2O, ethane gas reacts with oxygen to produce carbon dioxide and steam. If 18.6 g of C2H6 reacts with 69.2 g of O2 to produce 54.4 g of CO2, how much steam does it produce?
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List at least 5 industries and 5 daily activities that contribute to the build-up of harmful gasses in the atmosphere and one way of combating each of these emission build-ups and then describe the way that your method of combating the build-up of each emission might change the way in which we live.
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write the overall reaction of zinc metal reacting with copper ions in aqueous solution. calculate ecell for this reaction
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A biochemist wanted to adjust the of of a buffer solution composed of ( ) and , by adding moles of. (assume the volume of the solution is not affected by this addition. ) determine the of the resulting solution:
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pure toluene (c7h8) has a normal boiling point of 110.60oc. a solution of 7.80 g of anthracene (c14h10), in 100.0 g.toluene has a boiling point of 112.06oc. a. what is the molality of the solution? b. what is the molal boiling point elevation constant for toluene?
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Group the labels according to the type of rock they describe.
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how does melting and boiling point support the fact that elements in the same group have similar properties
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fluorine gas consists of diatomic molecules of fluorine. how many molecules of fluorine are in one mole of fluorine?
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what topology did the cured adhesive and uv-cured diacrylate exhibit?
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explain how you used your titration data to determine the volume of naoh used to reach the equivalence point of your titration. comment on the extent of agreement with the predicted volume you calculated above.g
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NEEDD HELP URGENTLY, NOBODY ELSE IS HELPING FFS2.0 mol of Ca(OH)2 are mixed with 2.0 mol of HCl according to the following equation:Ca(OH)2+2HCl=CaCl2+2H2Oa. Which chemical is in excess and which is limiting reactant?b. What is the excess in grams?c.Theoretically,how many moles of H20 will be produced?
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For each equation listed below, determine the H and type of reaction (endothermic or exothermic)a) C(s) + O2(g) CO2(g) + 393.51 kJ b) CH4(g) + 2O2(g) CO2(g) + H2O(l) + 890.13 kJ c) CaCO3(s) + 176 kJ CaO(s) + CO2(g) d) H2O(g) H2O(l) + 44.02 kJ
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A student investigates the number of particles of water that exist in a closed test tube throughout the phasechange of liquid to gas.How many particles will be in the test tube after the water vaporizes and turns into a gas?
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what type of geometry does acetone (ch2o), in which three bonding pairs of electrons are arrayed around the central atom, have?
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Functional groups rosuvastatin
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What is the pH of the solution obtained by mixing 35.00 mL of 0.250 M HCl and 35.00 mL of 0.125 M NaOH?
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if 254 ml of a 2.10 m sucrose solution is diluted to 850.0 ml , what is the molarity of the diluted solution?
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