Chemistry concepts and calculations
117302 questions • Page 371 / 2347
A 40.0-kg box initially at rest is pushed 5.00 m along a rough, horizontal floor
A 40.0-kg box initially at rest is pushed 5.00 m along a rough, horizontal floor with a constant applied horizontal force f equal 130 N The coefficient of friction between box and…
A 40.00 mL solution of 0.3550 M AgNO3 was added to a solution of AsO43–. Ag3AsO4
A 40.00 mL solution of 0.3550 M AgNO3 was added to a solution of AsO43–. Ag3AsO4 precipitated and was filtered off. Fe3 was added and the solution was titrated with 0.2700 M KSCN.…
A 40.00 mL wine sample is titrated with a 1.04 times 10^-1M solution of sodium h
A 40.00 mL wine sample is titrated with a 1.04 times 10^-1M solution of sodium hydroxide. The equivalence point is determined to be 29.267 mL. What is the acidity of the wine expr…
A 400-W industrial carbon dioxide cutting laser is capable of cutting 3.0-mm thi
A 400-W industrial carbon dioxide cutting laser is capable of cutting 3.0-mm thick steel at a rate of 20 mm/s. Carbon dioxide lasers operate at a wavelength of 10.6 m. The spot si…
A 4000 kg truck traveling with a velocity of 20m/s due south collides head on wi
A 4000 kg truck traveling with a velocity of 20m/s due south collides head on with with a 1350 kg car traveling with a velocity of 10m/s due north. The two vehicles stick together…
A 42-year-old woman decides to lose weight on a diet prescribed by an anorexic f
A 42-year-old woman decides to lose weight on a diet prescribed by an anorexic friend. She loses about 30 pounds in 45 days, but her serum potassium level falls to 2.1 mmol/L (nor…
A 42.36 mL aliquot of 0.09410 M NaOH was added to a 0.3952 g sample of crushed a
A 42.36 mL aliquot of 0.09410 M NaOH was added to a 0.3952 g sample of crushed aspirin tablet dissolved in ethanol. The acetylsalicylic acid in the aspirin tablet was neutralized …
A 42.5-mL sample of 0.205 M CH_3 COOH solution is titrated with 0.172 M NaOH. Ca
A 42.5-mL sample of 0.205 M CH_3 COOH solution is titrated with 0.172 M NaOH. Calculate the pH of the solution (This problem requires values in your textbook's specific appendices…
A 42.5-mL sample of 0.205 M CH_3 COOH solution is titrated with 0.172 M NaOH. Ca
A 42.5-mL sample of 0.205 M CH_3 COOH solution is titrated with 0.172 M NaOH. Calculate the pH of the solution (This problem requires values in your textbook's specific appendices…
A 425 mg sample of a weak diprotic acid is dissolved in enough water to make 275
A 425 mg sample of a weak diprotic acid is dissolved in enough water to make 275.0 ml of solution. The pH of this solution is 3.08. A saturated solution of calcium hydroxide (Ksp=…
A 425 mg sample of a weak diprotic acid is dissolved in enough water to make 275
A 425 mg sample of a weak diprotic acid is dissolved in enough water to make 275.0 ml of solution. The pH of this solution is 3.08. A saturated solution of calcium hydroxide (Ksp=…
A 440-MW coal-fired power plant is burning coal that contains 185 ppb of Mercury
A 440-MW coal-fired power plant is burning coal that contains 185 ppb of Mercury. The coal firing rate is 300,000 lb/hr, and the flue gas flow rate is 1.0 million SCFM. The mercur…
A 443.4 ng sample of an unknown radioactive substance was placed in storage and
A 443.4 ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance had decreased to …
A 45.0 g sample of ethyleneglycol, HOCH 2 CH 2 OH, is dissolvedin 590.0 g of wat
A 45.0 g sample of ethyleneglycol, HOCH2CH2OH, is dissolvedin 590.0 g of water. Thevapor pressure of water at 32°C is 35.7 mm Hg. What is thevapor pressure of the water-ethylene g…
A 45.0 mL buffer solution is 0.430 M Na2HPO4 (aq) and 0.330 M KH2PO4 (aq). The k
A 45.0 mL buffer solution is 0.430 M Na2HPO4 (aq) and 0.330 M KH2PO4 (aq). The ka for H2PO4- is 6.2*10-8 a. what is the pH of the buffer solution b. what are the pH and the pH cha…
A 45.00-mL sample of a solution of sodium hydroxide, NaOH, reacts with 0.3575 g
A 45.00-mL sample of a solution of sodium hydroxide, NaOH, reacts with 0.3575 g of potassium hydrogen phthalate (KHP), KHC_6H_4(COO)_2. NaOH + KHP rightarrow NaKP + 2H_2O Calculat…
A 45.1-mL sample of gas in a cylinder is warmed from 27 C to 91 C. Part A What i
A 45.1-mL sample of gas in a cylinder is warmed from 27 C to 91 C. Part A What is its volume at the final temperature? (Assume constant pressure.) A 45.1-mL sample of gas in a cyl…
A 45.70 g sample of solid antimony is initially at 611.00°C. If 6.128 * 10^3 J o
A 45.70 g sample of solid antimony is initially at 611.00°C. If 6.128 * 10^3 J of heat are added to the sample at constant pressure ( = 1 atm), which of the following is/are true?…
A 45.9 g sample of a metal is heated to 95.2 C and then placed in a calorimeter
A 45.9 g sample of a metal is heated to 95.2 C and then placed in a calorimeter containing 120.0 g of water (c=4.18 J/g C) at 21.6 C. The final temperature of water is 24.5 C. Whi…
A 46.0%/54.0% by volume propane/n-butane mixture is cooled from 255°C to 193°C.
A 46.0%/54.0% by volume propane/n-butane mixture is cooled from 255°C to 193°C. FInd the change in ethalpy of this mixture by following the steps below. Assume ideal behavior. a) …
A 466-gram sample of water is heated from 8.50 degree C to 74.60 degree C. Calcu
A 466-gram sample of water is heated from 8.50 degree C to 74.60 degree C. Calculate the amount of heat absorbed by the water. The specific heat of water is 4.184 j/g- degree C. A…
A 48-year-old woman was seen by her primary physician for a routine physical exa
A 48-year-old woman was seen by her primary physician for a routine physical examination. Her father and his brother died before the age 55 with acute MI and another uncle had CAB…
A 5 mL pipet has graduation marks every 0.1 mL, therefore it can be read to 2 de
A 5 mL pipet has graduation marks every 0.1 mL, therefore it can be read to 2 decimal places. When a liquid is drawn to the 5 mL mark, it should dispense 5.00 mL of liquid. Suppos…
A 5% aqueous solution of hydrogen peroxide ( OTC hydrogen peroxide)decomposes sl
A 5% aqueous solution of hydrogen peroxide ( OTC hydrogen peroxide)decomposes slowly, but hydrogen peroxide dropped onto a fresh sliceof an apple evolves foam rapidly. Give a logi…
A 5-carat diamond has a mass of 1,000 g. I the gemstone displaces a liquid from
A 5-carat diamond has a mass of 1,000 g. I the gemstone displaces a liquid from 1.00 mL to 1.30 mL in a glass burette, what is the density of the diamond? Aluminum foil is often i…
A 5-day BOD test is performed on a sample of chlorinated wastewater effluent. Fi
A 5-day BOD test is performed on a sample of chlorinated wastewater effluent. Fifty milliliters of wastewater sample and 2 mL of "seed" are added to the 300-mL BOD bottles and mix…
A 5.0 L flask is filled with 0.25 mol SO3, 0.50 mol SO2, and1.0 mol O2, and allo
A 5.0 L flask is filled with 0.25 mol SO3, 0.50 mol SO2, and1.0 mol O2, and allowed to reach equilibrium. Assume the tempertureof the mixture is chosen so the Kc = 0.12. Predict t…
A 5.0 g sample of a certain metal is heated to 100.0 degree Celsius and is quick
A 5.0 g sample of a certain metal is heated to 100.0 degree Celsius and is quickly immersed in a calorimeter that contains 10.0 g of water at 20.0 degree Celsius. The metal, water…
A 5.0 microliter sample containing aniline (C 6 H 5 NH 2 ) and anisole (C 6 H 5
A 5.0 microliter sample containing aniline (C6H5NH2) and anisole (C6H5OCH3) together with other substances was injected into a gas chromatograph. The heights for the peaks of thes…
A 5.0 mole sample of ideal gas is heated reversibly at constant pressure (2.5 at
A 5.0 mole sample of ideal gas is heated reversibly at constant pressure (2.5 atm) from 300. K to 750. K. Assume the gas has a constant pressure heat capacity. C_p = 5/2 R. Calcul…
A 5.00 L flask of Carbon Dioxide (CO2) gas at a pressure of 4.54 ATM had a mass
A 5.00 L flask of Carbon Dioxide (CO2) gas at a pressure of 4.54 ATM had a mass of 36.0g. A. How many miles of gas are in this flask? B. What is the temperature, in Kelvin and C, …
A 5.00 L tank at 17.5 °C is filled with 19.5 g of boron trifluoride gas and 18.4
A 5.00 L tank at 17.5 °C is filled with 19.5 g of boron trifluoride gas and 18.4 g of carbon monoxide gas. You can assume both under these conditions. 4 g of carbon monoxide gas. …
A 5.00 g pellet of aluminum reaches a final temperature of 63 degree C when gain
A 5.00 g pellet of aluminum reaches a final temperature of 63 degree C when gaining 200 J of heat. What is its initial temperature? When resting, a person gives off heat at rate o…
A 5.00 g sample of Al reacts with excess H_2SO_4. What volume of H_2 gas is prod
A 5.00 g sample of Al reacts with excess H_2SO_4. What volume of H_2 gas is produced at STP? 2 Al(s) + 3 H_2SO_4(aq) rightarrow Al_2(SO_4)3 (aq) + 3 H_2(g) Two solutions. 250.0 mL…
A 5.00 g sample of water vapor, initially at 155degreeC is cooled at atmospheric
A 5.00 g sample of water vapor, initially at 155degreeC is cooled at atmospheric pressure, producing ice at -55degreeC. Calculate the amount of heat energy lost by the water sampl…
A 5.00 gram sample ofa compound is dissolved in enough water to form 100.0 mL of
A 5.00 gram sample ofa compound is dissolved in enough water to form 100.0 mL ofsolution. This solution has an osmotic pressure of 25.0 torrat 25 C. If it is assumed that each mol…
A 5.00 mL sample of blood was treated with trichloroacetic acid to precipitate p
A 5.00 mL sample of blood was treated with trichloroacetic acid to precipitate proteins. After centrifugation, the resulting solution was brought to pH of 3 and extracted with two…
A 5.00 mL sample of ethanol in gasoline is mixed with 95.0 mL of chloroform. The
A 5.00 mL sample of ethanol in gasoline is mixed with 95.0 mL of chloroform. The chloroform will function as your internal standard. The mixture is injected into a GC. The ethanol…
A 5.00 mL sample was diluted to 1.000 L in a volumetric flask. The ethanol in a
A 5.00 mL sample was diluted to 1.000 L in a volumetric flask. The ethanol in a 25.00 mL aliquot of the diluted solution was distilled into 50.00 mL of 0.02000 M K_2Cr_2O_7 and ox…
A 5.00 mL solution of BaCl_2 dissolved in water weighed 5.227 g. After the water
A 5.00 mL solution of BaCl_2 dissolved in water weighed 5.227 g. After the water was removed by heating 0.236 g of BaCl_2 remained. Using the formulas on page 38 in the lab manual…
A 5.00 mL solution of BaCl_2 dissolved in water weighed 5.360 g. After the water
A 5.00 mL solution of BaCl_2 dissolved in water weighed 5.360 g. After the water was removed by heating 0.369 g of BaCL_2, remained. Using the formulas on page 38 in the lab manua…
A 5.00 ml sample of blood was treated with trichloroacetic acid to precipitate p
A 5.00 ml sample of blood was treated with trichloroacetic acid to precipitate proteine. After centrifugation, the resulting solution was brought to a PH of 3 and was extracted wi…
A 5.00 wt% aqueous sulfuric acid solution (p=1.03 g/L) flows through a 45-m long
A 5.00 wt% aqueous sulfuric acid solution (p=1.03 g/L) flows through a 45-m long pipe with a 6.0 cm diameter at a rate of 82 L/min. What is the molarity of sulfuric acid in the so…
A 5.00 wt% aqueous sulfuric acid solution (rho = 1.03 g/ml) flows through a 45-m
A 5.00 wt% aqueous sulfuric acid solution (rho = 1.03 g/ml) flows through a 45-m long pipe with a 6.0 cm diameter at a rate of 82 L/min. What is the molarity of sulfuric acid in t…
A 5.00-mL sample of blood was treated with trichloroacetic acid to precipitate (
A 5.00-mL sample of blood was treated with trichloroacetic acid to precipitate (i.e. remove) proteins. After ccntrifugation, the solution was brought to a pH of 2.7 and was extrac…
A 5.00-mL sample of blood was treated with trichloroacetic acid to precipitate p
A 5.00-mL sample of blood was treated with trichloroacetic acid to precipitate proteins. After centrifugation, the resulting solution was brought to a pH of 3 and was extracted wi…
A 5.00-mL sample of blood was treated with trichloroacetic acid to precipitate p
A 5.00-mL sample of blood was treated with trichloroacetic acid to precipitate proteins. After centrifugation, the resulting solution was brought to pH 3 and extracted with two 5-…
A 5.00-mL sample of nitric acid required 13.25 mL of 0.0842 M strontium hydroxid
A 5.00-mL sample of nitric acid required 13.25 mL of 0.0842 M strontium hydroxide for titration. Calculate e molarity of the acid solution. A solution made by adding 9.00 g of pho…
A 5.00-wt% aqueous sulfuric acid solution ( density = 1.03 g/ML ) flows through
A 5.00-wt% aqueous sulfuric acid solution ( density = 1.03 g/ML ) flows through a 45-m long pipe with a 6.0 cm diameter at a rate of 87L/min. What is the molarity of sulfuric acid…
A 5.00-wt% aqueous sulfuric acid solution (density=1.03 g/mL)flows through a 45-
A 5.00-wt% aqueous sulfuric acid solution (density=1.03 g/mL)flows through a 45-m long pipe with a 6.0 cm diamete at a rate of87 L/min. (a) What is the molarity of the sulfuric ac…
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