Chemistry concepts and calculations
117302 questions • Page 136 / 2347
1. Perform the following additions in 6 bit twos complement . Circle the 6 bit a
1. Perform the following additions in 6 bit twos complement. Circle the 6 bit answer for each. Show your work (carries and sums). Additionally, indicate for each: 1) whether there…
1. Pewter, which is mainly tin, was commonly used for tableware on old sailing s
1. Pewter, which is mainly tin, was commonly used for tableware on old sailing ships. However, divers rarely find pewter objects in sunken ships unless an iron object is nearby. P…
1. Phenolphthalein (Hln), which is commonly used as an indicator in acid-base ti
1. Phenolphthalein (Hln), which is commonly used as an indicator in acid-base titrations, is a weak acid. In an aqueous solution, Hln exists in equilibrium with its conjugate…
1. Phenolphthalein, Ka= 7.9x10^-12,is yellow in its protonated form (HX) and red
1. Phenolphthalein, Ka= 7.9x10^-12,is yellow in its protonated form (HX) and red in its ionized form (X-). At what pH will alizarin yellow R be a perfect orange color? Express you…
1. Phenolphthalein, Ka= 7.9x10^-12,is yellow in its protonated form (HX) and red
1. Phenolphthalein, Ka= 7.9x10^-12,is yellow in its protonated form (HX) and red in its ionized form (X-). At what pH will alizarin yellow R be a perfect orange color? Express you…
1. Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used i
1. Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used in manufacturing certain dyes and plastics. Phosgene can be produced by reacting carbon monoxide and…
1. Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used i
1. Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used in manufacturing certain dyes and plastics. Phosgene can be produced by reacting carbon monoxide and…
1. Phosgene is nasty stuff. It is often referred to as mustard gas since it was
1. Phosgene is nasty stuff. It is often referred to as mustard gas since it was used in World War I. It has somewhat more peaceful uses, one of which is as a building block for th…
1. Phosphoric acid Write the 3 equilibrium reactions for the dissociation of pho
1. Phosphoric acid Write the 3 equilibrium reactions for the dissociation of phosphoric acid in water. Use the CRC or the textbook to write the corresponding pKa values next to ea…
1. Phosphoric acid Write the 3 equilibrium reactions for the dissociation of pho
1. Phosphoric acid Write the 3 equilibrium reactions for the dissociation of phosphoric acid in water. Use the CRC or the textbook to write the corresponding pKa values next to ea…
1. Phosphorous acid, H3PO3(aq), is a diprotic oxyacid that is an important compo
1. Phosphorous acid, H3PO3(aq), is a diprotic oxyacid that is an important compound in industry and agriculture. Calculate the pH for each of the following points in the titration…
1. Phosphorous pentachloride gives an equilibrium mixture ofPCl 5 , PCl 3 and Cl
1. Phosphorous pentachloride gives an equilibrium mixture ofPCl5, PCl3 and Cl2 whenheated PCL5(g) ------> PCl3(g) + Cl2(g) …
1. Phosphorus pentachloride gas decomposes to produce phosphorus trichloride gas
1. Phosphorus pentachloride gas decomposes to produce phosphorus trichloride gas and chlorine. 2. Lithium reacts with oxygen gas to produce solid lithium oxide. 3, Aqueous potassi…
1. Phosphorus pentachloride gas decomposes to produce phosphorus trichloride gas
1. Phosphorus pentachloride gas decomposes to produce phosphorus trichloride gas and chlorine. 2. Lithium reacts with oxygen gas to produce solid lithium oxide. 3, Aqueous potassi…
1. Photoelectric effect. Li metal is irradiated with light at two wavelengths. A
1. Photoelectric effect. Li metal is irradiated with light at two wavelengths. At 300 nm the kinetic energy of the ejected electron is 2.935 x 1019 J. Alternatively, when irradiat…
1. Place 10.0mL cyclohexanol in a 250 mL Erlenmeyer flask and then add 25mL of g
1. Place 10.0mL cyclohexanol in a 250 mL Erlenmeyer flask and then add 25mL of glacial acetic acid. Place the flask in an ice 2. Using an addition funnel, add 75mL of a 5%NaOCI so…
1. Place the following compounds in order of decreasing strength of intermolecul
1. Place the following compounds in order of decreasing strength of intermolecular forces: F2 NH2CH3 CH4 2. Put the following in order of decreasing boiling point: N2 NO H2O…
1. Place the following in order of decreasing standard molar entropy. H2O (l) H2
1. Place the following in order of decreasing standard molar entropy. H2O (l) H2O (g) H2O (s) A) H2O (g) > H2O (l) > H2O (s) B) H2O (s) > H2O (l) > H2O (g) C) H2O (g) …
1. Place the following substances in order of decreasing boiling point. (3 %) Ne
1. Place the following substances in order of decreasing boiling point. (3 %) Ne Cl2 O2 Place the fo…
1. Place the following substances in order of decreasing boiling point. (4 %) CH
1. Place the following substances in order of decreasing boiling point. (4 %) CH4CH3Cl HBr NaNO3 HOCH2CH2OH …
1. Please accomplish Internet keyword searches to find out how these models diff
1. Please accomplish Internet keyword searches to find out how these models differ from the basic SDLC approach. In this case, use the six phases of the classbook SDLC as the basi…
1. Please explain why micro-segregation and macro-segregation happen during prac
1. Please explain why micro-segregation and macro-segregation happen during practical solidification. (10 pts) For materials science, the essential point is to figure out an effec…
1. Please fillin each blank with the best answar from the following choices, Lis
1. Please fillin each blank with the best answar from the following choices, Listed choices may bé used more than once: transferring sharing core octet attraction repulsion H S02 …
1. Please help C questions Consider the assignment statement: x= (y-3) * (a + b
1. Please help C questions Consider the assignment statement: x= (y-3) * (a + b / c) % That statement includes 5 different operators (+,*, -,/, %) in the expression to the right o…
1. Please select the answer True or False Almost all irreversible enzyme inhibit
1. Please select the answer True or False Almost all irreversible enzyme inhibitors bind noncovalently to the enzyme. 2. Initial rate data for an enzyme that obeys Michaelis-Mente…
1. Please write down the basic building blocks for the glasses of 1) vitreous si
1. Please write down the basic building blocks for the glasses of 1) vitreous silica, 2) alkali silicate, 3) alkali/alkaline earth silicate, 4) alkali aluminosilicate, 5) vitreous…
1. Plot a suitable graph todetermine the value of absolute zero. a. Calculate th
1. Plot a suitable graph todetermine the value of absolute zero. a. Calculate the percentageerror in your value of absolute zero with the accepted value. b. Two s…
1. Polypeptides are very important biological compounds, also known as proteins.
1. Polypeptides are very important biological compounds, also known as proteins. How are polypeptides similar in structure to polyamides or polyesters? 2. Pesticides have more rec…
1. Potassium Sulfate and Barium Nitrate. 2. Hydrochloric Acid and Silver Nitrate
1. Potassium Sulfate and Barium Nitrate. 2. Hydrochloric Acid and Silver Nitrate. 3. Hydrochloric acid and Potassium Hydroxide.
1. Potassium dichromate in acidic solution is used to titrate a solution of iron
1. Potassium dichromate in acidic solution is used to titrate a solution of iron(II) ions, with which it reacts according to Cr2O7 2- (aq) + 6Fe2+ (aq) + 14H3O+ (aq) 2Cr3+ (aq) + …
1. Potassium permanganate is another strong oxidizing substance similar to potas
1. Potassium permanganate is another strong oxidizing substance similar to potassium dichromate. An acidic solution of purple permanganate ions can get reduced to colorless Mn2+ i…
1. Predict and Name products for: Na C 6 H 5 CH 2 Br a) CH 3 C=CH ??? ??? Cl AlC
1. Predict and Name products for: Na C6H5CH2Br a) CH3C=CH ??? ??? …
1. Predict and Name products for: Na C 6 H 5 CH 2 Br a) CH 3 C=CH ??? ??? Cl AlC
1. Predict and Name products for: Na C6H5CH2Br a) CH3C=CH ??? ??? …
1. Predict if a reaction will occur when Pb(s) and hydrochloric acid(aq) are com
1. Predict if a reaction will occur when Pb(s) and hydrochloric acid(aq) are combined. If a reaction occurs, write a balanced equation for the reaction. 2. Predict if a reaction w…
1. Predict qualitatively how the retention times in gas chromatography will vary
1. Predict qualitatively how the retention times in gas chromatography will vary for a. heptane, octane, nonane, and decane b. benzene, toluene, ethyl benzene, and xylene 2. 2-pen…
1. Predict the products (including physical states), and write the total ionic a
1. Predict the products (including physical states), and write the total ionic and net ionic equations for the reaction between hydrochloric acid and aqueous sodium hydroxide. che…
1. Predict the products (including physical states), and write the total ionic a
1. Predict the products (including physical states), and write the total ionic and net ionic equations for the reaction between hydrochloric acid and aqueous sodium hydroxide. che…
1. Predict the values which should be expected for the constants Ccharles and Cb
1. Predict the values which should be expected for the constants Ccharles and Cboyle assuming 5.0 mL of air at 25 C and 1.0 atm. (use L for volume). 2. Suppose you determine that …
1. Predict whether the following complexes would be labile or inert and explain
1. Predict whether the following complexes would be labile or inert and explain your answers. The magnetic moment of each complex in Bohr Magnetons (uB) is for each complex. Potas…
1. Predict which ionic compound has the highest melting point. a. NaB b. MgBr2 c
1. Predict which ionic compound has the highest melting point. a. NaB b. MgBr2 c. RbI d.AlN e. KCl 2.Which is a correct method for converting Fahrenheit to Celsius? a. C = F x 9/5…
1. Predict which ionic compound has the highest melting point. a. NaB b. MgBr2 c
1. Predict which ionic compound has the highest melting point. a. NaB b. MgBr2 c. RbI d.AlN e. KCl 2.Which is a correct method for converting Fahrenheit to Celsius? a. C = F x 9/5…
1. Predict which of the following liquids has greater surface tension: ethanol (
1. Predict which of the following liquids has greater surface tension: ethanol (C2H5OH) or dimethyl ether (Ch3OCH3). 2. Metallic iron crystallizes in a cubic lattice. The unit ce…
1. Prepare Mg standards : Dilute 100-ppm Mg standard stock solution (you made pr
1. Prepare Mg standards: Dilute 100-ppm Mg standard stock solution (you made previously) to the following concentrations in the previously cleaned test tubes. Use volumetric pipet…
1. Prepare Mg standards : Dilute 100-ppm Mg standard stock solution (you made pr
1. Prepare Mg standards: Dilute 100-ppm Mg standard stock solution (you made previously) to the following concentrations in the previously cleaned test tubes. Use volumetric pipet…
1. Prepare Mg standards : Dilute 100-ppm Mg standard stock solution (you made pr
1. Prepare Mg standards: Dilute 100-ppm Mg standard stock solution (you made previously) to the following concentrations in the previously cleaned test tubes. Use volumetric pipet…
1. Prepare your first buffer by mixing 50.0 mL of 0.100 M NaOAc and 45.0 mL of 0
1. Prepare your first buffer by mixing 50.0 mL of 0.100 M NaOAc and 45.0 mL of 0.100 M HOAc. Use graduated cylinders for these volume measurements. Mix well. 2. Prepare your secon…
1. Pressurized tanks are commonly used in gas propulsion for space applications.
1. Pressurized tanks are commonly used in gas propulsion for space applications. A closed, rigid and insulated tank with a volume of 0.1 m3contains 0.7 kg of N2 and 1.1 kg of…
1. Primary amines can act as bases; they can- Select one: a. Absorb a proton to
1. Primary amines can act as bases; they can- Select one: a. Absorb a proton to become R-NH2+2 b. Release a proton to become R-NH2+ c. Absorb a proton to become R-NH3+ d. Release …
1. Primary amines can act as bases; they can- Select one: a. Absorb a proton to
1. Primary amines can act as bases; they can- Select one: a. Absorb a proton to become R-NH2+2 b. Release a proton to become R-NH2+ c. Absorb a proton to become R-NH3+ d. Release …
1. Program Timer 0 in C to generate a square wave of 3 kHz. Assume that XTAL = 1
1. Program Timer 0 in C to generate a square wave of 3 kHz. Assume that XTAL = 11.0592 MHz. 2. Program Timer 1 in C to generate a square wave of 3 kHz. Assume that XTAL = 11.0592 …
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