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For the chemical reactions shown below, calculate the number of electrons transferred in the redox process. 2Cr2(O7)2- (aq) + 16H+ (aq) --> 4Cr3+ (aq) +3O2 (g) + 8H2O (l)
Calculate the energy required to keep lightbulb burning for 3 hours in each of the energy units of Joules and Kilocalories
A container holds 2,0 of gas. the total average change in KE of gas molecules in the container is equal to the the sum of KE of an 8,0x10^-3 -Kg bullet with speed of 770 m/s.
Magnesium nitride reacts with liquid water to form insoluble magnesium hyrdroxide and ammonia. What is the balanced equation for such?
A mixture of 7.50 g He and 29.5 g Ne has a pressure of 750. mm Hg. What is the partial pressure of each of the gases?
Calculate the molar enthalpy of combustion of Phosphorous when this combustion process was carried out under the constant pressure?
write the amino acid sequence in the N-terminal to C-terminal direction. Use the three-letter amino acid abbreviations (for example, Glu-Asp-Val).
A 150.0-g sample of a metal at 75.0 °C is added to 150.0 g of H2O at 15.0 °C. The temperature of the water rises to 18.9 °C. Calculate the specific heat capacity of the metal, assuming that all the heat lost by the metal is gained by the water.
A 10.1 g sample of CaCl2 is dissolved in 119 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the surroundings and assuming the solution has a specific heat capacity of 4.18 J/°C·..
0.2 M HCl is used to neutralize 20 mL of 0.35 M NaOH. a. How many moles of OH- are present?
The pressure inside a hydrogen-filled container was 2.10 atm at 21 C. What would the pressure be if the container was heated to 94 C?
how many moles of hydrogen gas (H2) can be liberated from 104 mol of magnesium hydride if the process operates on 77% efficency?
Iron has a density of 7.87 g/cm3. What mass of iron would be required to cover a football playing surface of 120 yds × 60 yds to a depth of 10 mm? (1 inch = 2.54 cm; 1 lb = 453.6 g)
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