Chemistry concepts and calculations
117302 questions • Page 1990 / 2347
When 2.16 L of 1.800M Na_2S0_4 solution at 30.0degreeC is mixed with 1.42 L of 0
When 2.16 L of 1.800M Na_2S0_4 solution at 30.0degreeC is mixed with 1.42 L of 0.360 M Ba(N0_3)_2 solution at 30.degreeC in a calorimeter, the white solid BaS0_4 forms, and the te…
When 2.46g of a nonelectrolyte solute is dissolved in water to make 115 ml of so
When 2.46g of a nonelectrolyte solute is dissolved in water to make 115 ml of solution at 25 degrees C, the solution exerts an osmotic pressure of 959 torr. A) what is the molar c…
When 2.500 g of hydrogen gas, H2(g), was completely reacted with gaseous nitroge
When 2.500 g of hydrogen gas, H2(g), was completely reacted with gaseous nitrogen, N2(g), at constant pressure to produce gaseous ammonia, NH3(g), i.e., in the reaction: 3 H2(g) +…
When 2.5000g of NaOH were dissolved in 49.0g water in a calorimeter at 24.0C, th
When 2.5000g of NaOH were dissolved in 49.0g water in a calorimeter at 24.0C, the temperature of the solution went up to 37.1C. a) is this dissolving process exothermic? yes or no…
When 2.5000g of NaOH were dissolved in 49.0g water in a calorimeter at 24.0C, th
When 2.5000g of NaOH were dissolved in 49.0g water in a calorimeter at 24.0C, the temperature of the solution went up to 37.1C. a) is this dissolving process exothermic? yes or no…
When 2.55g of an unknown weak acid (HA) with a molar mass of 85.0 g/mol is disso
When 2.55g of an unknown weak acid (HA) with a molar mass of 85.0 g/mol is dissolved in 250.0 g of water, the freezing point of the resulting solution is -0.258 Degrees Celsius. C…
When 2.95 ml of hydrogen peroxide solution decomposes, 36.9 ml of oxygen gas is
When 2.95 ml of hydrogen peroxide solution decomposes, 36.9 ml of oxygen gas is evolved. The oxygen gas is collected over water at 24 celsius and at a total pressureof 762 mmHg. T…
When 2.95 ml of hydrogen peroxide solution decomposes, 36.9 ml of oxygen gas is
When 2.95 ml of hydrogen peroxide solution decomposes, 36.9 ml of oxygen gas is evolved. The oxygen gas is collected over water at 24 celsius and at a total pressureof 762 mmHg. T…
When 2.950 g of AX (s) dissolves in 100.0 g of water in a coffee-cup calorimeter
When 2.950 g of AX (s) dissolves in 100.0 g of water in a coffee-cup calorimeter the temperature rises from 22.0 oC to 31.7 oC. Calculate the enthalpy change (in kJ/mol) for the …
When 20.6 gm of methane and 39.7 gm of chlorine gas undergo a reaction that has
When 20.6 gm of methane and 39.7 gm of chlorine gas undergo a reaction that has a 73.3 % yield. What mass of CH3Cl forms.? Hydrogen chloride also forms.
When 20.6 gm of methane and 39.7 gm of chlorine gas undergo a reaction that has
When 20.6 gm of methane and 39.7 gm of chlorine gas undergo a reaction that has a 73.3 % yield. What mass of CH3Cl forms.? Hydrogen chloride also forms.
When 20mL of 1.40M solution of calcium nitrate is mixed with 70.0mL of 0.234M po
When 20mL of 1.40M solution of calcium nitrate is mixed with 70.0mL of 0.234M potassium iodate a precipitate (Ca(IO3)2) is formed. a) Write a balanced equation for this reaction b…
When 20mL of 1.40M solution of calcium nitrate is mixed with 70.0mL of 0.234M po
When 20mL of 1.40M solution of calcium nitrate is mixed with 70.0mL of 0.234M potassium iodate a precipitate (Ca(IO3)2) is formed. a) Write a balanced equation for this reaction b…
When 22.5 When 22.5 grams of hydrogen sulfide(g) react with excess oxygen(g) acc
When 22.5 When 22.5 grams of hydrogen sulfide(g) react with excess oxygen(g) according to the following reaction: 2H2S(g) + 3O2(g) 2H2O(g) + 2SO2(g) ?H = -1.04E+3 kJ Which of the …
When 22.5 When 22.5 grams of hydrogen sulfide(g) react with excess oxygen(g) acc
When 22.5 When 22.5 grams of hydrogen sulfide(g) react with excess oxygen(g) according to the following reaction: 2H2S(g) + 3O2(g) 2H2O(g) + 2SO2(g) ?H = -1.04E+3 kJ Which of the …
When 23.6 g of calcium chloride, CaCl_2, was dissolved in water in a calorimeter
When 23.6 g of calcium chloride, CaCl_2, was dissolved in water in a calorimeter, the temperature rose from 25.0degreeC to 38.7degreeC. If the heat capacity of the solution and th…
When 25 ml of 1 M H 2 SO 4 is added to 50ml of 1 M NaOH at 25 C in a calorimeter
When 25 ml of 1 M H2SO4 is added to 50ml of 1 M NaOH at 25 C in a calorimeter, the temp of the aqueous solution increases to 33.9 C. Assuming the specific heat os the solution is …
When 25.0 mL of 1.00 M NaOH (aq) at 25.0 degree C is mixed 25.0 mL of 1.00 M HCI
When 25.0 mL of 1.00 M NaOH (aq) at 25.0 degree C is mixed 25.0 mL of 1.00 M HCI (aq) at 26.5 degree C, the temperature of the resulting solution rises to 32.5 degree C. Assume s_…
When 25.0 mL of 1.00 M NaOH(aq) at 25.0 degree C is mixed with 25.0 mL of 1.00 M
When 25.0 mL of 1.00 M NaOH(aq) at 25.0 degree C is mixed with 25.0 mL of 1.00 M HCl (aq) at 26.5 degree C, the temperature of the resulting solution rises to 32.5 degree C. Assum…
When 25.23 g of methanol, CH3OH, froze, 4.01 kJ of heat was released. What is th
When 25.23 g of methanol, CH3OH, froze, 4.01 kJ of heat was released. What is the enthalpy of fusion of methanol? (b) A sample of benzene was vaporized at 25 When 25.23 g of metha…
When 25.5 mL of 0.500 M H2SO4 is added ot 25.5 mL of 1.00 M KOH in a coffee-cup
When 25.5 mL of 0.500 M H2SO4 is added ot 25.5 mL of 1.00 M KOH in a coffee-cup calorimeter at 23.50 degrees Celsius, the temmperature rises to 30.17 degrees Celsius. Calculate de…
When 25.5 mL of 0.500 M H2SO4 is added ot 25.5 mL of 1.00 M KOH in a coffee-cup
When 25.5 mL of 0.500 M H2SO4 is added ot 25.5 mL of 1.00 M KOH in a coffee-cup calorimeter at 23.50 degrees Celsius, the temmperature rises to 30.17 degrees Celsius. Calculate de…
When 25g or H2O at 80.4 C is added to 100g at 24.7 C in a calorimeter (also at 2
When 25g or H2O at 80.4 C is added to 100g at 24.7 C in a calorimeter (also at 24.7C), the equilibrium temperature is 35.0C. How much heat is lost to the calorimeter. How would I …
When 27.2 g of solid A, at its melting point of 34.0 degree C, was added to 62.7
When 27.2 g of solid A, at its melting point of 34.0 degree C, was added to 62.7 g of liquid A at 51.2 degree C, the mixture cooled to 35.0 degree C, with no solid remaining. Give…
When 27.5 mL of 0.615 M H2SO4 is added to 27.5 mL of 1.23 M KOH in a coffee-cup
When 27.5 mL of 0.615 M H2SO4 is added to 27.5 mL of 1.23 M KOH in a coffee-cup calorimeter at 23.50
When 27.5 mL of 0.615 M H2SO4 is added to 27.5 mL of 1.23 M KOH in a coffee-cup
When 27.5 mL of 0.615 M H2SO4 is added to 27.5 mL of 1.23 M KOH in a coffee-cup calorimeter at 23.50
When 28.0 mL of 0.515 M H 2 SO 4 is added to 28.0 mL of 1.03 M KOH in a coffee-c
When 28.0 mL of 0.515 M H2SO4 is added to 28.0 mL of 1.03 M KOH in a coffee-cup calorimeter at 23.50 When 28.0 mL of 0.515 M H2SO4 is added to 28.0 mL of 1.03 M KOH in a coffee-cu…
When 29.7 g of HCI and 28.4 g of CaCO_2 are mixed both reactants are completely
When 29.7 g of HCI and 28.4 g of CaCO_2 are mixed both reactants are completely consumed. What mass of CO_2 gas is produced if the mass of he other producers formed is 36.6 g? (A)…
When 2A (g) B(g) + C(g) [exothermic] is at equilibrium the concentration
When 2A (g) <-----> B(g) + C(g) [exothermic] is at equilibrium the concentration of B a. increase b. decreases c. is unchanged d. changes randomly e. cannot predict Concentr…
When 3.56 g of an unknownhydrocarbon was dissolved in 125 g of benzene, the free
When 3.56 g of an unknownhydrocarbon was dissolved in 125 g of benzene, the freezing pointof the solution was found to be 4.41oC. Analysis of thehydrocarbon showed that it contain…
When 3.648 grams of Epsom salt is heated to a constant mass, 1.782 grams of anhy
When 3.648 grams of Epsom salt is heated to a constant mass, 1.782 grams of anhydrous magnesium sulfate is produced, according to the equation below. What is the formula for hydra…
When 3.648 grams of Epsom salt is heated to a constant mass, 1.782 grams of anhy
When 3.648 grams of Epsom salt is heated to a constant mass, 1.782 grams of anhydrous magnesium sulfate is produced, according to the equation below. What is the formula for hydra…
When 33.5mL of 0.635 M H2SO4 is added to 33.5 mL of 1.27M KOH in a coffee cup ca
When 33.5mL of 0.635 M H2SO4 is added to 33.5 mL of 1.27M KOH in a coffee cup calorimeter at 23.50 celcius, the temperature rises to 30.17 celcius. Calculate the deltaH of this re…
When 34.5 mL of 0.515 M H 2 SO 4 is added to 34.5 mL of 1.03 M KOH in a coffee-c
When 34.5 mL of 0.515 M H2SO4 is added to 34.5 mL of 1.03 M KOH in a coffee-cup calorimeter at 23.50 When 34.5 mL of 0.515 M H2SO4 is added to 34.5 mL of 1.03 M KOH in a coffee-cu…
When 35.0 mL of 0.685 M H 2 SO 4 is added to 35.0 mL of 1.37 M KOH in a coffee-c
When 35.0 mL of 0.685 M H2SO4 is added to 35.0 mL of 1.37 M KOH in a coffee-cup calorimeter at 23.50 When 35.0 mL of 0.685 M H2SO4 is added to 35.0 mL of 1.37 M KOH in a coffee-cu…
When 38.0 mL of 0.1250 M H 2 SO 4 is added to 100. mL of a solution of Pb(NO 3 )
When 38.0 mL of 0.1250 M H2SO4 is added to 100. mL of a solution of Pb(NO3)2, a precipitate of PbSO4 forms. The PbSO4 is then filtered from the solution, dried, and weighed. If th…
When 38.21 g of pure copper reacts with 192.83g of iodine, 190.83g of a compound
When 38.21 g of pure copper reacts with 192.83g of iodine, 190.83g of a compound containing only copper and iodine result. 40.21g of iodine remain when the reaction is complete. D…
When 4 He is cooled below 2.17 K it becomes a “superfluid” with unique propertie
When 4 He is cooled below 2.17 K it becomes a “superfluid” with unique properties such as the viscosity approaching zero. One way to learn about the superfluid environment is to m…
When 4.00 mol of benzene is vaporized at a constant pressure of 1.00 atm and at
When 4.00 mol of benzene is vaporized at a constant pressure of 1.00 atm and at its normal boiling point of 80.1°C, 135.6 kJ are absorbed and PV for the vaporization process is eq…
When 4.25 g of a nonelectrolyte solute is dissolved in 335 mL of water at 29 C,
When 4.25 g of a nonelectrolyte solute is dissolved in 335 mL of water at 29 C, the resulting solution exerts an osmotic pressure of 859 torr. What is the molar concentration of t…
When 4.25 g of a nonelectrolyte solute is dissolved in 335 mL of water at 29 C,
When 4.25 g of a nonelectrolyte solute is dissolved in 335 mL of water at 29 C, the resulting solution exerts an osmotic pressure of 859 torr. What is the molar concentration of t…
When 5.00 g of ammonium nitrate (NH_4NO_3) was dissolved in 50.0 mL of water in
When 5.00 g of ammonium nitrate (NH_4NO_3) was dissolved in 50.0 mL of water in a coffee-cup calorimeter, the temperature dropped to 18.0 degree C from 22.0 degree C. If the heat …
When 5.00 mL of a sodium nitrite solution containing 17.04 g/L of sodium nitrite
When 5.00 mL of a sodium nitrite solution containing 17.04 g/L of sodium nitrite is added to 25.00 mL of sulfamic acid solution containing 2.754 g/L of sulfamic acid, the followin…
When 5.00 mL of a sodium nitrite solution containing 17.04 g/L of sodium nitrite
When 5.00 mL of a sodium nitrite solution containing 17.04 g/L of sodium nitrite is added to 25.00 mL of sulfamic acid solution containing 2.754 g/L of sulfamic acid, the followin…
When 5.00 mol of benzene is vaporized at a constant pressure of 1.00 atm and at
When 5.00 mol of benzene is vaporized at a constant pressure of 1.00 atm and at its normal boiling 178) point of 80.1°C, 169.5 kJ are absorbed and PV for the vaporization process …
When 5.12 g of NaOH were dissolved in 51.55 g water in a calorimeter at 24.5 C,
When 5.12 g of NaOH were dissolved in 51.55 g water in a calorimeter at 24.5 C, the temperature of the solution went up to 49.8 C. a. Calculate qH20. b. Find delta H for the react…
When 5.12g of NaOH were dissolved in 51.55g water in a calorimeter at 24.5C, the
When 5.12g of NaOH were dissolved in 51.55g water in a calorimeter at 24.5C, the temperature of the solution went up to 49.8C a) calculate qh20 b) find delta H for the reaction as…
When 5.12g of NaOH were dissolved in 51.55g water in a calorimeter at 24.5C, the
When 5.12g of NaOH were dissolved in 51.55g water in a calorimeter at 24.5C, the temperature of the solution went up to 49.8C a) calculate qh20 b) find delta H for the reaction as…
When 5.144 grams of a hydrocarbon, C,Hy were burned in a combustion analysis app
When 5.144 grams of a hydrocarbon, C,Hy were burned in a combustion analysis apparatus, 17.39 grams of CO, and 3.560 grams of H,0 were produced. In a separate experiment, the mola…
When 5.144 grams of a hydrocarbon, C,Hy were burned in a combustion analysis app
When 5.144 grams of a hydrocarbon, C,Hy were burned in a combustion analysis apparatus, 17.39 grams of CO, and 3.560 grams of H,0 were produced. In a separate experiment, the mola…
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