Chemistry concepts and calculations

A 1.080g sample of a salt containing Fe^2+ is titrated with 0.1231M KMnO4. The e

A 1.080g sample of a salt containing Fe^2+ is titrated with 0.1231M KMnO4. The end point of the titration is reached at 22.40mL. Find the mass percent of Fe^2+ in the sample. The …

A 1.080g sample of a salt containing Fe^2+ is titrated with 0.1231M KMnO4. The e

A 1.080g sample of a salt containing Fe^2+ is titrated with 0.1231M KMnO4. The end point of the titration is reached at 22.40mL. Find the mass percent of Fe^2+ in the sample. The …

A 1.1 kg block of iron at 26 C is rapidly heated by a torch such that 15 kJ is t

A 1.1 kg block of iron at 26 C is rapidly heated by a torch such that 15 kJ is transferred to it. What temperature would the block of iron reach assuming the complete transfer of …

A 1.12 g sample of soil containing Ni2+ and Zn2+ and other nonmetals was digeste

A 1.12 g sample of soil containing Ni2+ and Zn2+ and other nonmetals was digested in acid and diluted to a final volume of 50.00 mL. This solution was treated with 25.0 mL of 0.04…

A 1.2 kg block of iron at 21 C is rapidly heated by a torch such that 18 kJ is t

A 1.2 kg block of iron at 21 C is rapidly heated by a torch such that 18 kJ is transferred to it. What temperature would the block of iron reach assuming the complete transfer of …

A 1.2 kg block of iron at 23 C is rapidly heated by a torch such that 18 kJ is t

A 1.2 kg block of iron at 23 C is rapidly heated by a torch such that 18 kJ is transferred to it. What temperature would the block of iron reach assuming the complete transfer of …

A 1.2-L container of liquid nitrogen is kept in a closet measuring 1.0m by 1.3m

A 1.2-L container of liquid nitrogen is kept in a closet measuring 1.0m by 1.3m by 2.0m . Assume that the container is completely filled to the top with liquid nitrogen, that the …

A 1.241-g sample of a solid, weak, monoprotic acid is used to make 100.0 mL of s

A 1.241-g sample of a solid, weak, monoprotic acid is used to make 100.0 mL of solution. 50.0 mL of this solution was titrated with 0.08126-M NaOH. The pH after the addition of 30…

A 1.241-g sample of a solid, weak, monoprotic acid is used to make 100.0 mL of s

A 1.241-g sample of a solid, weak, monoprotic acid is used to make 100.0 mL of solution. 50.0 mL of this solution was titrated with 0.08126-M NaOH. The pH after the addition of 30…

A 1.2485 g sample of CaCO3 is used to standardize an EDTA titrant. The CaCO3 was

A 1.2485 g sample of CaCO3 is used to standardize an EDTA titrant. The CaCO3 was dissolved in water and buffered to pH = 9.0. It required 39.53 mL of EDTA to reach the end point. …

A 1.249g mixture containing calcium chloride and sodium chloride reacts with exc

A 1.249g mixture containing calcium chloride and sodium chloride reacts with excess sodium carbonate as per equation to precipitate 0.567g of calcium carbonate. a) calculate the m…

A 1.3 kg block of iron at 32 C is rapidly heated by a torch such that 13 kJ is t

A 1.3 kg block of iron at 32 C is rapidly heated by a torch such that 13 kJ is transferred to it. What temperature would the block of iron reach assuming the complete transfer of …

A 1.3-L container of liquid nitrogen is kept in a closetmeasuring 1.0 m by 1.0 m

A 1.3-L container of liquid nitrogen is kept in a closetmeasuring 1.0 m by 1.0 m by 2.0 m. Assuming that the container is completely full, that thetemperature is 28.9 degrees C, a…

A 1.345g antacid tablet was dissolved in 75.00mL HCl (0.225M). It was then back

A 1.345g antacid tablet was dissolved in 75.00mL HCl (0.225M). It was then back titrated with 28.76mL Naoh (0.201 M). 1) Calculate the number of moles of HCl that was neutralized …

A 1.35 mol sample of Xe gas is confined in a 33.0 liter container at 24.9 °C. If

A 1.35 mol sample of Xe gas is confined in a 33.0 liter container at 24.9 °C. If the amount of gas is increased to 2.03 mol, holding the volume and temperature constant, the press…

A 1.35m aqueous solution of compound X had a boiling point of 101.4 degree C. Wh

A 1.35m aqueous solution of compound X had a boiling point of 101.4 degree C. Which one of the following could be compound X? The boiling point elevation constant for water is 0.5…

A 1.379-g sample of commercial KOH contaminated K 2 CO 3 by was dissolved in wat

A 1.379-g sample of commercial KOH contaminated K2CO3 by was dissolved in water, and the resulting solution was diluted to 500.0 mL. A 50.00-mL aliquot of this solution was treate…

A 1.4 kg block of iron at 25 C is rapidly heated by a torch such that 17 kJ is t

A 1.4 kg block of iron at 25 C is rapidly heated by a torch such that 17 kJ is transferred to it. What temperature would the block of iron reach assuming the complete transfer of …

A 1.4 kg block of iron at 36 C is rapidly heated by a torch such that 16 kJ is t

A 1.4 kg block of iron at 36 C is rapidly heated by a torch such that 16 kJ is transferred to it. What temperature would the block of iron reach assuming the complete transfer of …

A 1.40 mL sample of red blood cells containing chromium-51 as a tracer was injec

A 1.40 mL sample of red blood cells containing chromium-51 as a tracer was injected into a patient. After several hours a 5.00 mL sample of blood was drawn and its activity compar…

A 1.42 L buffer solution consists of 0.176 M butanoic acid and 0.280 M sodium bu

A 1.42 L buffer solution consists of 0.176 M butanoic acid and 0.280 M sodium butanoate. Calculate the pH of the solution following the addition of 0.077 moles of NaOH. Assume tha…

A 1.475-g sample containing NH4Cl (FM 53.492), K2CO3 (FM 138.21), and inert ingr

A 1.475-g sample containing NH4Cl (FM 53.492), K2CO3 (FM 138.21), and inert ingredients was dissolved to give 0.100 L of solution. A 25.0-mL aliquot was acidified and treated with…

A 1.5 kW heater is to be used to heat a room with dimensions 3.5 m Times 5.0 m T

A 1.5 kW heater is to be used to heat a room with dimensions 3.5 m Times 5.0 m Times 3.0 m. There are no heat losses from the room, but the room is not airtight, 3. so the pressur…

A 1.5 kg box that is sliding on a frictionless surface with a speed of 13 m/s ap

A 1.5 kg box that is sliding on a frictionless surface with a speed of 13 m/s approaches a horizontal spring, (see the fioure (Figure 1)) The spring has a spring constant of 2100 …

A 1.5 mol sample of ideal gas, with C_P, m = 2.75 R, initially at a pressure of

A 1.5 mol sample of ideal gas, with C_P, m = 2.75 R, initially at a pressure of 1.5 atm and a temperature of 298.15 K undergoes the following 3-step cycle: I rightarrow II Adiabat…

A 1.50 kg solid metal sphere at 100 oC is initially placed in a well-insulated v

A 1.50 kg solid metal sphere at 100 oC is initially placed in a well-insulated vessel with 4.00 mol air at 20 oC, and the vessel is closed immediately. After some amount of time t…

A 1.50 ml sample of KCl is added to 35.0 ml H_2O in a Styrofoam cup and stirred

A 1.50 ml sample of KCl is added to 35.0 ml H_2O in a Styrofoam cup and stirred until dissolved. The temperature of the solution drops from 24.8 to 22.4 degree C. Assume that the …

A 1.50-mol sample of ideal gas undergoes an irreversible isothermal expansion at

A 1.50-mol sample of ideal gas undergoes an irreversible isothermal expansion at 298 K. Its initial pressure is 10.0 bar. It expands against a constant external pressure of 1.00 b…

A 1.500 g of sample of BaCl2 x H2O was heated until all of the water was removed

A 1.500 g of sample of BaCl2 x H2O was heated until all of the water was removed. The residue after heating weighed 1.268 g. Below is the partial data sheet that ate required to f…

A 1.5000-g sample of an alloy was dissolved in acid and the tin was precipitated

A 1.5000-g sample of an alloy was dissolved in acid and the tin was precipitated as H2SnO3 · xH2O.  After filtration and ignition, the resulting precipitate of SnO2 weighed 0.1430…

A 1.515 g sample of a component of the light petroleum distillate called naphtha

A 1.515 g sample of a component of the light petroleum distillate called naphtha is found to yield 4.644 g CO2(g) and 2.218 g H2O(l) on complete combustion. This particular compou…

A 1.531 sample of SO_2 at pressure of 5.6 Times 10^3 Pa. if the pressure changed

A 1.531 sample of SO_2 at pressure of 5.6 Times 10^3 Pa. if the pressure changed to 1.5 Times 10^2 Pa at constant temperature, what is the new volume of the gas. A gas sample with…

A 1.534g sample of a component of the light petroleum distillate called naphtha

A 1.534g sample of a component of the light petroleum distillate called naphtha is found to yield 4.702g CO2(g) and 2.245g H2O(l) on complete combustion. This particular compound …

A 1.534g sample of a component of the light petroleum distillate called naphtha

A 1.534g sample of a component of the light petroleum distillate called naphtha is found to yield 4.702g CO2(g) and 2.245g H2O(l) on complete combustion. This particular compound …

A 1.56 oz. Snickers bar contains 215 Calories (kcal). Convert this energy to uni

A 1.56 oz. Snickers bar contains 215 Calories (kcal). Convert this energy to units of joules. What is the wavelength in nm of a photon with an energy of 8.23*10^-19J (E = hv; c = …

A 1.606 sample of a component of the light petroleum distillate called naphtha i

A 1.606 sample of a component of the light petroleum distillate called naphtha is found to yield 4.923 and 2.351 on complete combustion. This particular compound is also found to …

A 1.606 sample of a component of the light petroleum distillate called naphtha i

A 1.606 sample of a component of the light petroleum distillate called naphtha is found to yield 4.923 and 2.351 on complete combustion. This particular compound is also found to …

A 1.70 T magnetic field points northeast. Find the magnitude of the force on a +

A 1.70 T magnetic field points northeast. Find the magnitude of the force on a +0.40 C charge that is moving 10 m/s toward the north. Find the direction of the force on a +0.40 C …

A 1.728 g sample of a Pb/Cd alloy was dissolved in acid and diluted to exactly 5

A 1.728 g sample of a Pb/Cd alloy was dissolved in acid and diluted to exactly 500 mL. Titration of a 25.00 mL aliquot at a pH = l0 in an NH4 + /NH3 buffer required 43.60 mL of st…

A 1.73 g sample of a pure monoprotic acid, HA , was dissolved in distilled water

A 1.73 g sample of a pure monoprotic acid, HA , was dissolved in distilled water, to a create a solution with volume 50.0 mL. The HA solution was then titrated with 0.250 M NaOH .…

A 1.73 mole sample of Ar undergoes an isothermal reversible expansion from an in

A 1.73 mole sample of Ar undergoes an isothermal reversible expansion from an initial volume of 2.00 L to a final volume of 85.0 L at 311 K. Calculate the work done in this proces…

A 1.738 g sample of a component of the light petroleum distillate called naphtha

A 1.738 g sample of a component of the light petroleum distillate called naphtha is found to yield 5.327 g CO2(g) and 2.544 g H2O(l) on complete combustion. This particular compou…

A 1.762 g sample of impure H2C2O4 (MW =90.04) was dissolved in water and the imp

A 1.762 g sample of impure H2C2O4 (MW =90.04) was dissolved in water and the impurities removed by filtration. 50.00 mL of .01028 M NaOH was added to the filtrate, this being in e…

A 1.762 g sample of impure H2C2O4 (MW =90.04) was dissolved in water and the imp

A 1.762 g sample of impure H2C2O4 (MW =90.04) was dissolved in water and the impurities removed by filtration. 50.00 mL of .01028 M NaOH was added to the filtrate, this being in e…

A 1.800- g sample of solid phenol ( C 6 H 5 O H ( s ) ) was burned in a bomb cal

A 1.800-g sample of solid phenol (C6H5OH(s)) was burned in a bomb calorimeter whose total heat capacity is 11.66 kJ/?C. The temperature of the calorimeter plus contents increased …

A 1.85 mol sample of Xe gas is confined in a 46.3 liter container at 31.9 °C. If

A 1.85 mol sample of Xe gas is confined in a 46.3 liter container at 31.9 °C. If the amount of gas is decreased to 0.925 mol, holding the volume and temperature constant, the pres…

A 1.879-g sample of a Pb Cd alloy was dissolved in acid and diluted to exactly 2

A 1.879-g sample of a Pb Cd alloy was dissolved in acid and diluted to exactly 250.0 mL in a volumetric flask. A 50.00-mL aliquot of the diluted solution was brought to a pH of 10…

A 1.9 kg block of iron at 37 ?C is rapidly heated by a torch such that 14 kJ is

A 1.9 kg block of iron at 37 ?C is rapidly heated by a torch such that 14 kJ is transferred to it. What temperature would the block of iron reach assuming the complete transfer of…

A 1.90 mol sample of N 2 gas is confined in a 45.9 liter container at 21.5 °C. I

A 1.90 mol sample of N2 gas is confined in a 45.9 liter container at 21.5 °C. If the amount of gas is decreased to 0.950 mol, holding the volume and temperature constant, the pres…

A 1.93 g sample of caffeine (C 8 H 10 N 4 O 2 ) burns in a constant-volume calor

A 1.93 g sample of caffeine (C8H10N4O2) burns in a constant-volume calorimeter that has a heat capacity of 7.81 kJ/K. The temperature increases from 297.65 K to 303.96 K. Part A: …