Chemistry concepts and calculations

1) A compound contains 59 % C, 6./2 % H and 53.4 % b) If the molecular weight of

1) A compound contains 59 % C, 6./2 % H and 53.4 % b) If the molecular weight of the compound is 60.0 g/mol, what is its molecular formula? by mass. a) What is its empirical formu…

1) A compound is found to contain 34.60 % chlorine , 46.85 % oxygen , and 18.55

1) A compound is found to contain 34.60 % chlorine , 46.85 %oxygen , and 18.55 % fluorine by mass. To answer the question, enter the elements in the order presented above. QUESTIO…

1) A constant current of 0.800 A is run through the electrolytic cell in order t

1) A constant current of 0.800 A is run through the electrolytic cell in order to produce oxygen (gas) at the anode: 2 H2O O2(g) + 4 e- + 4 H+ The amount (in grams) of O2 obtained…

1) A flexible vessel is filled to a certain pressure with 39.00 L of gas. Under

1) A flexible vessel is filled to a certain pressure with 39.00 L of gas. Under conditions of constant temperature and moles of gas, how does the pressure of the gas change when t…

1) A functional group present in fats is: A) a carboxylic acid. B) an ester. C)

1) A functional group present in fats is: A) a carboxylic acid.   B) an ester.  C) an aldehyde. D) an alcohol 2) A lipid is hydrolyzed to form a mixture of fatty acids, glycerol a…

1) A galvanic cell is assembled using the following: Sn metal and 1.0 M Sn(NO 3

1) A galvanic cell is assembled using the following: Sn metal and 1.0 M Sn(NO3)2 in one half cell and Ag metal and 1.0 M AgNO3 in the other half cell. Calculate the standard cell …

1) A gamma ray has a frequency of 3.5 x 10 19 Hz. Determine the wavelength of th

1) A gamma ray has a frequency of 3.5 x 1019 Hz. Determine the wavelength of this radiation in nm and the energy of a photon of this radiation. 2a) The work function for Al is 6.5…

1) A gas cylinder that contains helium has an internal volume of 2.24 L. A press

1) A gas cylinder that contains helium has an internal volume of 2.24 L. A pressure gauge attached to the cylinder reads 2070 psi (1 atm = 14.7 psi) at 20.9 °C. What mass of heliu…

1) A gas has a volume of 4.00 L at 0°C. What final temperature in degrees Celsiu

1) A gas has a volume of 4.00 L at 0°C. What final temperature in degrees Celsius is needed to change the volume of the gas to 1.50 L if P and N do not change. 2) Calculate the fi…

1) A gas is compressed from an initial volume of 5.70L to a final volume of 1.20

1) A gas is compressed from an initial volume of 5.70L to a final volume of 1.20L by an external pressure of 1.00 atm. During the compression the gas releases 126J of heat. What i…

1) A gas mixture is made by combining 6.9 g each of Ar, Ne, and an unknown diato

1) A gas mixture is made by combining 6.9 g each of Ar, Ne, and an unknown diatomic gas. At STP, the mixture occupies a volume of 88.20 L. - What is the molar mass of the unknown …

1) A gas sample has a volume of 4250 mL at 20. ?C and 750. mmHg . What is the fi

1) A gas sample has a volume of 4250 mL at 20. ?C and 750. mmHg . What is the final temperature, in degrees Celsius, after the sample is transferred to a different container with …

1) A general chemistry 2 student creates a solution which is prepared by adding

1)     A general chemistry 2 student creates a solution which is prepared by adding 0.029 mol of NaCl to 1.00 L of 0.0140 M Pb(NO3)2. Which of the following statements is correct?…

1) A glass vessel calibrated to contain 9.76 mL at 4degree C was found to weigh

1) A glass vessel calibrated to contain 9.76 mL at 4degree C was found to weigh 22.624 g when empty and dry. Filled with a soduim chloride (NaCl) solution at the same temperature …

1) A goose is flying south for the winter at a constant speed. Keep in mind that

1) A goose is flying south for the winter at a constant speed. Keep in mind that one mile is 1.61 km , and one pound is 454 g .The goose has a mass of 22.7 lb (pounds) and is flyi…

1) A healthy, well-nourished 27-year-old ate a large steak and egg breakfast. A

1) A healthy, well-nourished 27-year-old ate a large steak and egg breakfast. A few hours later, she consumed an ice cream sundae. The protein from her diet is denatured and then …

1) A heliox deep-sea diving mixture contains 2.0 g of oxygen to every 98.0 g of

1) A heliox deep-sea diving mixture contains 2.0 g of oxygen to every 98.0 g of helium. What is the partial pressure of oxygen when this mixture is delivered at a total pressure o…

1) A helium-filled balloon is launched when the temperature at ground level is 2

1) A helium-filled balloon is launched when the temperature at ground level is 27.8°C and the barometer reads 752 mmHg. If the balloon's volume at launch is 9.47 × 104 L, what is …

1) A hot air balloon consists of a very large bag filled with heated air at 120.

1) A hot air balloon consists of a very large bag filled with heated air at 120.0 °C produced from a propane burner. It has a basket hanging under it in which several people can r…

1) A hub forwards incoming Ethernet traffic out a specific port based on where t

1) A hub forwards incoming Ethernet traffic out a specific port based on where the destination MAC address resides, while a switch blindly forwards traffic out all ports. a) True …

1) A laser dazzles the audience at a rock concert by emitting red light with a w

1) A laser dazzles the audience at a rock concert by emitting red light with a wavelength of 650 nm. Calculate the frequency of the light. 2) A 100-watt lightbulb radiates energy …

1) A lead atom has a mass of 3.4×1022g. How many lead atoms are in a cube of lea

1) A lead atom has a mass of 3.4×1022g. How many lead atoms are in a cube of lead that has a volume of 9.00 cm3 if the density of lead is 11.3 g/cm3? 2) If the diameter of a sodiu…

1) A liquid displays a convex meniscus in a graduated cylinder. What can be defi

1) A liquid displays a convex meniscus in a graduated cylinder. What can be definitely said about the liquid? The molecule must be nonpolar like water. The liquid does not have st…

1) A liquid displays a convex meniscus in a graduated cylinder. What can be defi

1) A liquid displays a convex meniscus in a graduated cylinder. What can be definitely said about the liquid? The molecule must be nonpolar like water. The liquid does not have st…

1) A liter of 0.050M pH 7.10 potassium phosphate buffer is needed for a certain

1)         A liter of 0.050M pH 7.10 potassium phosphate buffer is needed for a certain experiment.             The following four methods were proposed for the preparation of the…

1) A local FM radio station broadcasts at a frequency of 103.5 MHz a) what is th

1) A local FM radio station broadcasts at a frequency of 103.5 MHz a) what is the energy of one photon of this radiation? 2) The "ionization energy" is the energy needed to remove…

1) A mixture consisting of 2.336 g naphthalene, 1.556g of NaCl and the remainder

1) A mixture consisting of 2.336 g naphthalene, 1.556g of NaCl and the remainder sand had a total weight of 4.888 g. Calculate the % by mass of each component 2) A sample of a mix…

1) A mixture of A and B was partially separated on an HPLC column, resultin in o

1) A mixture of A and B was partially separated on an HPLC column, resultin in overlap of their chromatographic peaks. The absorbance of the effluent was monitored at 300nm (?A = …

1) A mixture of benzaldehyde, benzoic acid, and tolene is spotted on a silica ge

1) A mixture of benzaldehyde, benzoic acid, and tolene is spotted on a silica gel TLC plate and developed in a mixture of 1:1 Petroleum Ether-Ethyl Acetate as the solvent. Predict…

1) A mixture of benzaldehyde, benzoic acid, and tolene is spotted on a silica ge

1) A mixture of benzaldehyde, benzoic acid, and tolene is spotted on a silica gel TLC plate and developed in a mixture of 1:1 Petroleum Ether-Ethyl Acetate as the solvent. Predict…

1) A mixture of equal volumes of equimolar solutions of acetic acid and sodium a

1) A mixture of equal volumes of equimolar solutions of acetic acid and sodium acetate is made in 1 L flask. Calculate the pH of the solution. 2) A sample of 10.0 mL solution of 0…

1) A mixture of equal volumes of equimolar solutions of acetic acid and sodium a

1) A mixture of equal volumes of equimolar solutions of acetic acid and sodium acetate is made in 1 L flask. Calculate the pH of the solution. 2) A sample of 10.0 mL solution of 0…

1) A molecule, whose formula is AB, dissolves in water and also conducts electri

1) A molecule, whose formula is AB, dissolves in water and also conducts electricity. What one statement best describes this molecule after it's placed in water? A)AB exists as a …

1) A molecule, whose formula is AB, dissolves in water and also conducts electri

1) A molecule, whose formula is AB, dissolves in water and also conducts electricity. What one statement best describes this molecule after it's placed in water? A)AB exists as a …

1) A nurse practitioner orders 0.4 ounces (oz) of liquid Tylenol every 4-6 hr. f

1) A nurse practitioner orders 0.4 ounces (oz) of liquid Tylenol every 4-6 hr. for a temperature greater than 101.5°F. You have a measuring cup in milliliter (mL) calibrations. Ho…

1) A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25

1) A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25.0°C. What is the magnitude of k at Question options: 576 s-1 9.56 × 103 s-1 1.36 × 102 s-1 2.85 × …

1) A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25

1) A particular first-order reaction has a rate constant of 1.35 × 102 s-1 at 25.0°C. What is the magnitude of k at Question options: a) 576 s-1 b) 9.56 × 103 s-1 c) 1.36 × 102 s-…

1) A particular smoke detector contains 1.35 ? Ci of 241Am, with a half-life of

1) A particular smoke detector contains 1.35 ?Ci of 241Am, with a half-life of 458 years. The isotope is encased in a thin aluminum container. Calculate the mass of 241Am in grams…

1) A piece of Fe metal with a mass of 0.350 kg at a temperature of 300 oC is add

1) A piece of Fe metal with a mass of 0.350 kg at a temperature of 300 oC is added to 1.00 kg of H2O(l) at a temperature of 20 oC. What is the final equilibrium temperature of the…

1) A piece of Fe metal with a mass of 0.350 kg at a temperature of 300 oC is add

1) A piece of Fe metal with a mass of 0.350 kg at a temperature of 300 oC is added to 1.00 kg of H2O(l) at a temperature of 20 oC. What is the final equilibrium temperature of the…

1) A piece of potassium metal is added to water in a beaker. The reaction that t

1) A piece of potassium metal is added to water in a beaker. The reaction that takes place is 2K(s) + 2H2O(l) ?2 KOH(aq) + H2(g) Predict the signs of w, q, ?U, and ?H. 2) At 373.1…

1) A piece of potassium metal is added to water in a beaker. The reaction that t

1) A piece of potassium metal is added to water in a beaker. The reaction that takes place is 2K(s) + 2H2O(l) ?2 KOH(aq) + H2(g) Predict the signs of w, q, ?U, and ?H. 2) At 373.1…

1) A plausible final temperature when 75.0 mL of water at 80 o C is added to 100

1) A plausible final temperature when 75.0 mL of water at 80 oC is added to 100.0 mL of water at 20 oC is . . . ? 2) 3) (i don't know if that's the right answer) For the reaction …

1) A power plant with an efficiency of 65% combusts 500,000 metric tons (MT) of

1) A power plant with an efficiency of 65% combusts 500,000 metric tons (MT) of anthracite coal per year to generate electricity. It has been established that this type of coal ha…

1) A pressure of 1.25 atm is the same as a pressure of __________ of mm Hg. 2) W

1) A pressure of 1.25 atm is the same as a pressure of __________ of mm Hg. 2) What is the pressure (atm) of the enclosed gas in (i)? Assume that the gray liquid is mercury. use 2…

1) A process is carried out at constant pressure. Given that 0 > H > E, Select o

1) A process is carried out at constant pressure. Given that 0 > H > E, Select one: A. the system loses heat and expands during the process. B. the system absorbs heat and c…

1) A process or reaction which releases heat to the surroundingsis said to be A)

1) A process or reaction which releases heat to the surroundingsis said to be A) conservative. B) exergonic. C) isothermal. D) endothermic. E) exothermic. 2) The scientific princi…

1) A quantity of 8.228 g of an organic compound is dissolved in water to make 33

1) A quantity of 8.228 g of an organic compound is dissolved in water to make 330.0 mL of solution. The solution has an osmotic pressure of 1.43 atm at 27°C. The analysis of this …

1) A quantity of 8.228 g of an organic compound is dissolved in water to make 33

1) A quantity of 8.228 g of an organic compound is dissolved in water to make 330.0 mL of solution. The solution has an osmotic pressure of 1.43 atm at 27°C. The analysis of this …

1) A quantum harmonic oscillator with frequency contains 41 electrons. What is t

1) A quantum harmonic oscillator with frequency contains 41 electrons. What is the energy of the highest-energy electron? Assume that the electrons are in the lowest states possib…