Chemistry concepts and calculations
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When backpacking in the wilderness, hikers often boil water to sterilize it for
When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 30L of water for y…
When backpacking in the wilderness, hikers often boil water to sterilize it for
When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 30L of water for y…
When backpacking in the wilderness, hikers often boil water to sterilize it for
When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 40L of water for y…
When backpacking in the wilderness, hikers often boil water to sterilize it for
When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 40 L of water for …
When backpacking in the wilderness, hikers often boil water to sterilize it for
When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 40 of water for yo…
When backpacking in the wilderness, hikers often boil water to sterilize it for
When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 38 L of water for …
When backpacking in the wilderness, hikers often boil water to sterilize it for
When backpacking in the wilderness, hikers often boil water to sterilize it for drinking. Suppose that you are planning a backpacking trip and will need to boil 38 L of water for …
When backpacking in the wilderness, hikers often boil water tosterilize it for d
When backpacking in the wilderness, hikers often boil water tosterilize it for drinking. Suppose that you are planning abackpacking trip and will need to boil 36 L of water for yo…
When balanced, what is the sum of the coefficient in the reaction? 19 13 10 6 Th
When balanced, what is the sum of the coefficient in the reaction? 19 13 10 6 The standard potential energy(E degree) for this reaction is 2.0V. what is the delta G degree for thi…
When balancing the below half-reaction in acidic solution, electron are added to
When balancing the below half-reaction in acidic solution, electron are added to the side of the equation NH4^+ rightarrow NO2^- 6, reactant 6, product 8, reactant 8, product The …
When bar of cobalt is placed in a 1.0 M coppcr(II) nitrate solution and left to
When bar of cobalt is placed in a 1.0 M coppcr(II) nitrate solution and left to stand, solid copper is seen to deposit on the cobalt bar. and some Co^2+ ions are found in solution…
When benzene (C6H6) reacts with bromine (Br2), bromobenzene (C6H5Br) is obtained
When benzene (C6H6) reacts with bromine (Br2), bromobenzene (C6H5Br) is obtained: C6H6+Br2C6H5Br+HBr Part A What is the theoretical yield of bromobenzene in this reaction when 33.…
When benzene (C6H6) reacts with bromine (Br2), bromobenzene (C6H5Br) is obtained
When benzene (C6H6) reacts with bromine (Br2), bromobenzene (C6H5Br) is obtained: C6H6+Br2C6H5Br+HBr Part A What is the theoretical yield of bromobenzene in this reaction when 33.…
When benzene dissolves in water, it can be degraded by various bacteria species
When benzene dissolves in water, it can be degraded by various bacteria species through redox reactions depending on which oxidizing agents answer the following questions: a. Draw…
When bombarded with visible light, the chlorophyll molecule readily absorbs ligh
When bombarded with visible light, the chlorophyll molecule readily absorbs light with wave length of 465 (cyan) and 665 (red). The reason for this is: A. All other frequencies de…
When bruteforcing a password (e.g. the common attacks on DES), where you have ci
When bruteforcing a password (e.g. the common attacks on DES), where you have ciphertext only, you need a way to assess whether a decrypted plaintext is the right one. I believe t…
When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon d
When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. Question 17 of 20 Map General Chemistr Donald McQuarrie. Peter A. R…
When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon d
When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. How many grams of calcium chloride will be produced when 32.0 g of …
When calculating the heat of formation for MgO(s) + 2HCl(aq) -> MgCl2(aq) + H2O(
When calculating the heat of formation for MgO(s) + 2HCl(aq) -> MgCl2(aq) + H2O(l) we use 30ml of 1M HCl and 0.5g of magnesium oxide. We must crush up the pieces of magnesium o…
When calculating the heat of formation for MgO(s) + 2HCl(aq) -> MgCl2(aq) + H2O(
When calculating the heat of formation for MgO(s) + 2HCl(aq) -> MgCl2(aq) + H2O(l) we use 30ml of 1M HCl and 0.5g of magnesium oxide. We must crush up the pieces of magnesium o…
When calculating the overall extraction efficiency of the MIBK system based on t
When calculating the overall extraction efficiency of the MIBK system based on the Reserve Standard Solution concentrations determined before and after extraction; C- Reserve stan…
When calibrating a glass electrode, 0.025 m potassium dihydrogen phosphate/0.025
When calibrating a glass electrode, 0.025 m potassium dihydrogen phosphate/0.025 m disodium hydrogen phosphate buffer (see the NIST Buffers table) gave a reading of -19.3 mv at 30…
When calibrating the coffee-cup calorimeter with two pieces of copper metal (Par
When calibrating the coffee-cup calorimeter with two pieces of copper metal (Part A) which assumption is NOT reasonable? Both pieces of metal have the same molar heat capacity. If…
When canning jams and jellies, a small air space is left between the top of the
When canning jams and jellies, a small air space is left between the top of the jam and the jar lid, which is only loosely tightened. The jar may then be submerged in boiling wate…
When carbon dioxide gas dissolves in water, it reacts with the water to form car
When carbon dioxide gas dissolves in water, it reacts with the water to form carbonic acid. This is why soft drinks have a low pH, and soda water is often recommended as a mild cl…
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 25.2 g of carbon were burned in the presence of 81.4 g of oxygen, 14.2 g of oxygen remained unrea…
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 12.0 g of carbon were burned in the presence of 50.8 g of oxygen, 18.8 g of oxygen remained unreac…
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When
When carbon is burned in air, it reacts with oxygen to form carbon dioxide. When 12.0 g of carbon were burned in the presence of 50.8 g of oxygen, 18.8 g of oxygen remained unreac…
When carrying out an experiment, it is important not to confuse observations wit
When carrying out an experiment, it is important not to confuse observations with interpretations. Match the following scenarios to the appropriate category. Observations Interpre…
When carrying out the acid-base extractions in lab, you notice thatyou were aske
When carrying out the acid-base extractions in lab, you notice thatyou were asked (in the “Hints of Preparation”) toextract with sodium bicarbonate only once while the proceduredi…
When chemical processes occur, energy (typically in the form of heat) is either
When chemical processes occur, energy (typically in the form of heat) is either released-an exothermic process, or absorbed-an endothermic process. The breaking of bounds requires…
When chemical reactions are carried out under well-defined conditions, mass diff
When chemical reactions are carried out under well-defined conditions, mass differences provide an access to chemical compositions and empirical formulas. However, when no steps a…
When chemical reactions are carried out under well-defined conditions, mass diff
When chemical reactions are carried out under well-defined conditions, mass differences provide an access to chemical compositions and empirical formulas. However, when no steps a…
When chemists work with solid materials, we simply weigh out amounts of solid re
When chemists work with solid materials, we simply weigh out amounts of solid reagents and calculate mole amounts when thinking about stoichiometry. However, when we dissolve a so…
When chemists work with solid materials, we simply weigh out amounts of solid re
When chemists work with solid materials, we simply weigh out amounts of solid reagents and calculate mole amounts when thinking about stoichiometry. However, when we dissolve a so…
When chemists work with solid materials, we simply weigh out amounts of solid re
When chemists work with solid materials, we simply weigh out amounts of solid reagents and calculate mole amounts when stoichiometry, However, when we dissolvea solid (also known …
When chromatigraphically purifiying LDH... How might you separate LDH from anoth
When chromatigraphically purifiying LDH... How might you separate LDH from another protein that has all of the same chemical characteristics as LDH (cellular location, solubility/…
When clothes have stains, bleach is often added to the wash to react with the so
When clothes have stains, bleach is often added to the wash to react with the soil and make the stains colorless. One brand of bleach contains 5.25% sodium hypochlorite by mass (a…
When coal is burned the sulfur present in coal is converted to sulfur dioxide wh
When coal is burned the sulfur present in coal is converted to sulfur dioxide which is responsible for the acid phenomenon: S(s) +O2(g)---> SO2(g) If 3.15kg if S reacts with ox…
When coal is burned, the sulfer it contains is converted into sulfur dioxide. Th
When coal is burned, the sulfer it contains is converted into sulfur dioxide. The SO2 is a serious pollutant, so it needs to be removed before it escapes from the stack of a coal …
When coal is burned, the sulfur it contains is converted into sulfur dioxide. Th
When coal is burned, the sulfur it contains is converted into sulfur dioxide. This SO_2 is a serious pollutant, so it needs to be removed before it escapes from the stack of a coa…
When cobalt (II) chloride is added to pure water the Co2+ ionshydrate. The hydra
When cobalt (II) chloride is added to pure water the Co2+ ionshydrate. The hydrated form then reacts with Cl- ions to set up theequilibrium shown here: Co(H2O)62+(aq) + 4Cl-(aq) C…
When cobalt chloride is added to pure water, the Co 2+ ions hydrate. The hydrate
When cobalt chloride is added to pure water, the Co2+ ions hydrate. The hydrated form then reacts with the Cl- ions to set up the equilibrium shown here: Co(H2O)62+ + 4Cl- CoCl42-…
When comparing C3H8 to C9H10 regarding boiling point, vapor pressure and freezin
When comparing C3H8 to C9H10 regarding boiling point, vapor pressure and freezing point, which of the following statements is true? A) C3H8 has a higher boiling point, higher vapo…
When completing the ionization equation of perchloric acid with water what are t
When completing the ionization equation of perchloric acid with water what are the coefficients and products. NH3 + H2O ----> ___ _______ + ___ _______ Answers should be "coeff…
When concentrated H2SO4(l) is added to KI(aq), I2(s) andH2S(g) are formed. When
When concentrated H2SO4(l) is added to KI(aq), I2(s) andH2S(g) are formed. When the equation for this reaction isbalanced, what is the number of electrons transferred? Answer: 8, …
When concentrated sulfuric acid (18.0 M) is added to sodium chloride, hydrogen c
When concentrated sulfuric acid (18.0 M) is added to sodium chloride, hydrogen chloride gas is formed. H2SO4(l) + NaCl(s) ? NaHSO4(s) + HCl(g) When 50.0 mL of concentrated su…
When conducting a titration, why is a buret used to add titrant rather than a gr
When conducting a titration, why is a buret used to add titrant rather than a graduated cylinder? a) Burets can be held by the hand during a titration while graduated cylinders mu…
When conducting a transesterification , the reaction that forms biofuels (fatty
When conducting a transesterification, the reaction that forms biofuels (fatty acid methyl esters) from vegetable oils, there is a competing reaction called a saponification. Sapo…
When conducting chemical reactions in the lab or in industrial processes, it can
When conducting chemical reactions in the lab or in industrial processes, it can be important to know whether a reaction has reached equilibrium. By measuring the reaction quotien…
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