Chemistry concepts and calculations

5. A student was asked to determine the percentage of the components of a mixtur

5. A student was asked to determine the percentage of the components of a mixture of potassium bromide (KBr), magnesium hydroxide, Mg(OH)2, and barium sulfate (BaSO.. The mass of …

5. A student was asked to determine the percentage of the components of a mixtur

5. A student was asked to determine the percentage of the components of a mixture of potassium bromide (KBr), magnesium hydroxide, Mg(OH)2, and barium sulfate (BaSO.. The mass of …

5. A student was given a sample of a mixture containing NaCI, SiO, and NH,CL. Th

5. A student was given a sample of a mixture containing NaCI, SiO, and NH,CL. The sample was treated as explained in the experiment. From this data, calculate the mass of beaker a…

5. A student was given a sample of a mixture containing NaCI, SiO, and NH,CL. Th

5. A student was given a sample of a mixture containing NaCI, SiO, and NH,CL. The sample was treated as explained in the experiment. From this data, calculate the mass of beaker a…

5. A student wishes to determine the heat capacity ofa coffee-cup calorimeter. A

5. A student wishes to determine the heat capacity ofa coffee-cup calorimeter. After she mixes 100.0 g of water at 58.5degrees C with 100.0 g of water, already in the calorimeter,…

5. A. A new analytical extraction method was developed for a DNA analysis in fin

5. A. A new analytical extraction method was developed for a DNA analysis in finger print samples. A finger print sample was analyzed six times using the new protocol and found to…

5. Absorption of radiation can cause electrons to hop up from a lower energy lev

5. Absorption of radiation can cause electrons to hop up from a lower energy level to a higher energy level. If enough energy is put into the electron to promote it to the n-oo le…

5. According to the Brønsted-Lowry theory, which of these anions is the weakest

5. According to the Brønsted-Lowry theory, which of these anions is the weakest base? 1. Br2. CIO 3. NO, 4. F5. CH Coo- 6. According to the Lewis theory, a base 1. is a proton acc…

5. According to the Brønsted-Lowry theory, which of these anions is the weakest

5. According to the Brønsted-Lowry theory, which of these anions is the weakest base? 1. Br2. CIO 3. NO, 4. F5. CH Coo- 6. According to the Lewis theory, a base 1. is a proton acc…

5. Accurately determine the pH of 0.0995 M sulfuric acid. Ka1 >> 1 and Ka2 =0.01

5. Accurately determine the pH of 0.0995 M sulfuric acid. Ka1 >> 1 and Ka2 =0.012. 9. The equilibrium constant, Ka, for the reaction given below is is 6.0 x 10-3. Calculate …

5. After walking up a hill, an elephant is thirsty and drinks a 2- liter bottle

5. After walking up a hill, an elephant is thirsty and drinks a 2- liter bottle of Mountain Dew Soda. The sugar in 2 liters of Mountain Dew is equivalent to 260 g of glucose. How …

5. Air with T = 300 K and P = 100 kPa enters a Brayton-cycle compressor inlet. T

5. Air with T = 300 K and P = 100 kPa enters a Brayton-cycle compressor inlet. The combustion chamber adds 670 kJ/kg of air. Due to material considerations, the maximum gas temper…

5. Alkaline batteries operate in a potassium hydroxide liquid electrolyte which

5. Alkaline batteries operate in a potassium hydroxide liquid electrolyte which allows current to flow at room temperature. The two half-cell reactions, written as reduction react…

5. Alkaline batteries operate in a potassium hydroxide liquid electrolyte which

5. Alkaline batteries operate in a potassium hydroxide liquid electrolyte which allows current to flow at room temperature. The two half-cell reactions, written as reduction react…

5. Aluminium combines readily with both dry fluorine and dry chlorine. Anhydrous

5. Aluminium combines readily with both dry fluorine and dry chlorine. Anhydrous aluminium chloride is a white solid which sublimes at about 200°C, it reacts with water and dissol…

5. Aluminium combines readily with both dry fluorine and dry chlorine. Anhydrous

5. Aluminium combines readily with both dry fluorine and dry chlorine. Anhydrous aluminium chloride is a white solid which sublimes at about 200°C, it reacts with water and dissol…

5. Ammonium carbonate decomposes upon heating according to the following equatio

5. Ammonium carbonate decomposes upon heating according to the following equation: (NH4)2CO3 (s) 2NH3 (g) + CO2 (g) + H2O (g). Calculate the total volume of gas produced at 22 °Ca…

5. An Intense emission line for a new element is observed at a wavelength of 675

5. An Intense emission line for a new element is observed at a wavelength of 675 nm. What is the energy of a single photon of this light? Energy = Submit Answer Tries 0/2 6. For t…

5. An aqueous solution containing (2.3x10^-1) M of a generic acid, HA, has a pH

5. An aqueous solution containing (2.3x10^-1) M of a generic acid, HA, has a pH of 3.29. What is the Ka for this acid? HINT: Set up an ICE table, and use the pH value to determine…

5. An unknown metal, X, was found to react with copper (II) ions but not with zi

5. An unknown metal, X, was found to react with copper (II) ions but not with zinc ions. Where would it be located in the activity series you determined? 6. Of the metals used in …

5. An unknown organic compound contains 65.44 % C, 5.49 % H, and 29.06 % O by ma

5. An unknown organic compound contains 65.44 % C, 5.49 % H, and 29.06 % O by mass. Its molecular mass is 110 g/mol. What is the molecular formula of the organic compound? If 0.48…

5. Answer the bonding questions: a. In the carbonate ion, CO 3 2- , the total nu

5. Answer the bonding questions: a. In the carbonate ion, CO32-, the total number of groups on the central atom is____(1, 2 ,3 ,4) b. In the carbonate ion, the number of bonding g…

5. Ap endothermic reaction is allowed to reach equilibrium starting with reactan

5. Ap endothermic reaction is allowed to reach equilibrium starting with reactants only hat can you predict about the entropy change of the surroundings during the equilibration p…

5. As the pharmacist at a rural clinic in Ecuador, you have been asked to make 5

5. As the pharmacist at a rural clinic in Ecuador, you have been asked to make 550.0 mL of an eye wash solution (0.250 M H3B03) using deionized water and a stock boric acid soluti…

5. Aside from having specific functions in lab, glassware have accuracy and prec

5. Aside from having specific functions in lab, glassware have accuracy and precision levels that are important to factor into any experiment. Match the volumes in column B to the…

5. Aside from having specific functions in lab, glassware have accuracy and prec

5. Aside from having specific functions in lab, glassware have accuracy and precision levels that are important to factor into any experiment. Match the volumes in column B to the…

5. Assume that the partition coefficient, K, for partitioning of compound Abetwe

5. Assume that the partition coefficient, K, for partitioning of compound Abetween diethyl ether and water is 3; that is, A preferentially partitions into ether. a. Given 400 mL o…

5. Assume that the partition coefficient, K, for partitioning of compound Abetwe

5. Assume that the partition coefficient, K, for partitioning of compound Abetween diethyl ether and water is 3; that is, A preferentially partitions into ether. a. Given 400 mL o…

5. Assume the electron carriers below are all in a single chain, and that there

5. Assume the electron carriers below are all in a single chain, and that there is only one entry point to the chain. What is the order in which electrons would flow spontaneously…

5. Assume we use a heap to implement a priority queue: we insert elements into t

5. Assume we use a heap to implement a priority queue: we insert elements into the queue and remove elements in the order of their priority (max priority first). Assume we want to…

5. At 1024°C, the pressure of oxygen gas from the decomposition of copper(I)oxid

5. At 1024°C, the pressure of oxygen gas from the decomposition of copper(I)oxide is 0.490 bar ecomposition of copper(II)oxide is 0.490 bar: 4 CuO(s)2 Cu20(s) +029) (a) What is th…

5. Avoid splashing water out of the cylinder, and shake gently to remove any air

5. Avoid splashing water out of the cylinder, and shake gently to remove any air pockets. 6. Finish filling the cylinder to the 45-mL mark of the cylinder (like the (A)). Take a f…

5. Avoid splashing water out of the cylinder, and shake gently to remove any air

5. Avoid splashing water out of the cylinder, and shake gently to remove any air pockets. 6. Finish filling the cylinder to the 45-mL mark of the cylinder (like the (A)). Take a f…

5. Below are structures of common aspirin substitutes. Why do ibuprofen and napr

5. Below are structures of common aspirin substitutes. Why do ibuprofen and naproxen not give a positive test with 1% iron(III) chloride? Why does acetaminophen give a positive te…

5. Below is a transmission versus wavelength series of Zn chalcogenide windows o

5. Below is a transmission versus wavelength series of Zn chalcogenide windows of similar thickncss The right figure is a blow-up of the short wavelength side. Also shown is a por…

5. Boris recently synthesized an explosive compound he named Badenoughium. The m

5. Boris recently synthesized an explosive compound he named Badenoughium. The molecular formula for Bdenoughium is H5C3N3O9. The balance chemical equation for the ignition of Bad…

5. Calculate H° for: BaCO 3 (s) BaO(s) + CO 2 (g) using the data given below 2Ba

5. Calculate H° for: BaCO3(s) BaO(s) + CO2(g) using the data given below 2Ba(s) + O2(g) 2BaO(s)      H° = -1107.0kJ Ba(s) + CO2(g) + ½O2(g) BaCO3(s)      H° =-822.5 kJ: * -1929.5 …

5. Calculate delta Hrxn for the reaction between methane gas and chlorine gas th

5. Calculate delta Hrxn for the reaction between methane gas and chlorine gas that produces carbon tetrachloride gas and hydrogen chloride gas. Use the following reactions and giv…

5. Calculate how many grams of HCl can be neutralized by: a. 150 mg of CaCO3 b.

5. Calculate how many grams of HCl can be neutralized by: a. 150 mg of CaCO3 b. 150 mg of Mg(OH)2 c. 150 mg of NaHCO3 On a weight basis only, which would be the most effective? 6.…

5. Calculate how many grams of HCl can be neutralized by: a. 150 mg of CaCO3 b.

5. Calculate how many grams of HCl can be neutralized by: a. 150 mg of CaCO3 b. 150 mg of Mg(OH)2 c. 150 mg of NaHCO3 On a weight basis only, which would be the most effective? 6.…

5. Calculate the mass of oxý gen in a 69.5 g sample of aluminum oxide. 6. How ma

5. Calculate the mass of oxý gen in a 69.5 g sample of aluminum oxide. 6. How many total atoms are in a 75 g sample of Ag:0 7. (2 pts) Calculate the percent by mass of a solution …

5. Calculate the molar concentration of solute in each of the following solution

5. Calculate the molar concentration of solute in each of the following solutions: (a) Exactly 7.59 g of NH3 dissolved in 1.500 L of solution. (b) Exactly 0.291 g of H2S04 dissolv…

5. Calculate the molar ratio between copper and oxygen. . According to the mola

5. Calculate the molar ratio between copper and oxygen. . According to the mola oxide? Conclusions 1. How does the empirical formula calculated from experiment 2 compare to the em…

5. Calculate the number of moles and grams of methanol, CH3OH, that must be adde

5. Calculate the number of moles and grams of methanol, CH3OH, that must be added to 2.00 moles of water to make a solution that has equal numbers of methanol and water molecules.…

5. Calculate the vapor pressure of water over a solution of 78 grams of ethylene

5. Calculate the vapor pressure of water over a solution of 78 grams of ethylene glycol, C2H6O2, dissolved in 122 mL of water at 23oC. Please show all work with the correct answer…

5. Calculate the yield of copper oxide: (a) Expected number of moles of copper o

5. Calculate the yield of copper oxide: (a) Expected number of moles of copper oxide (using the empirical formula of copper oxide and the starting moles of Cu) (b) Actual mass of …

5. Cement is made by heating a mixture of minerals called ‘clinker’ to form a re

5. Cement is made by heating a mixture of minerals called ‘clinker’ to form a reactive mixture. The major raw material for the clinker-making is usually limestone (a mineral that …

5. Ch 8: Use a systematic treatment of equilibrium to calculate the pH of a solu

5. Ch 8: Use a systematic treatment of equilibrium to calculate the pH of a solution prepared by diluting 0.467 g of aniline (aminobenzene, C6H5NH2) to 100.0 mL. Pertinent equilib…

5. Ch 8: Use a systematic treatment of equilibrium to calculate the pH of a solu

5. Ch 8: Use a systematic treatment of equilibrium to calculate the pH of a solution prepared by diluting 0.467 g of aniline (aminobenzene, C6H5NH2) to 100.0 mL. Pertinent equilib…

5. Cheese is a good source of protein, calcium and Whole Milk phosphorus accordi

5. Cheese is a good source of protein, calcium and Whole Milk phosphorus according to most nutritionists but along with the good comes the bad. Cheese is often very high TOTAL FAT…