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Many power plants produce energy by burning carbon-based fuels, which also produces carbon dioxide. Carbon dioxide is a greenhouse gas, so over-production can have negative effects on the environmen
A 0.10-mol sample of a diprotic acid, H2A, is dissolved in 250 mL of water. The Ka1 of this acid is 1.0 x 10-5 and Ka2 is 1.0 x 10-10. Calculate the concentration of A2- in this solution.
Carbonyl fluoride, , is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride, via the reaction
When light of frequency 6.88×1015 s-1 shines on the surface of a metal, electrons are ejected with a maximum kinetic energy of 3.40×10-19 J. Calculate the wavelength of this light.
When 1717 J of heat energy is added to 40.0 g of ethanol, C2H6O, the temperature increases by 17.5 °C. Calculate the molar heat capacity of C2H6O.
would the separation of the grape soda dyes work equally well if you reversed the order of IPA concentrations and used 20% IPA first to remove the blue dye and then switched to 5% IPA to remove the
A researcher studying the nutritional value of a new candy places a 5.30-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen.
A certain reaction has an enthalpy of change in H = 54 kJ and an activation energy of Ea=81 kJ. What is the activation energy of the reverse reaction
Which too factors determine whether a collision between two reactant molecules will result in a reaction. select all that apply.
The reverse reaction is first order in B and the rate constant is 8.50 X 10^-1 What is the value of the equilibrium constant for the reaction A (equilibrium) B at this temperature
Describe the preparation of 40 liters of 0.02 M , pH 6.9, starting from a 2 M H3PO4 solution and a 1 M KOH solution
Carbonyl fluoride, , is an important intermediate used in the production of fluorine-containing compounds. For instance, it is used to make the refrigerant carbon tetrafluoride
The observed temperature increase is 2.64 °C. If the heat capacity of the calorimeter is 32.30 kJ·K^-1, how many nutritional Calories are there per gram of the candy
Calculate the enthalpy change for this reaction per mole of "X". Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 J/g*C and 1.00g/mL ] and that n
How many constitutionally isomeric monochlorides can be formed on free radical chlorination of 2,3,3-trimethylpentane
It takes 45.0J to raise the temperature of an 9.80g piece of unknown metal from 13.0C to 24.0 C. What is the specific heat for the metal
A gaseous mixture of O2 and N2 contains 39.8% nitrogen by mass. What is the partial pressure of oxygen in the mixture if the total pressure is 585mmHg
How do you draw this figure with dashed and solid wedges on the chirality centers (asymmetric carbons)
A reaction has a first order rate constant of 4.31x10-5 s-1 at 25oC and 0.00111 s-1 at 65oC. What is the value of the rate constant at 43oC
How would the Rf values change if you used pure dichloromethane ( no methanol ) as the mobile phase for the TLC separation of curcumin
An aqueous solution containing 9.05 g of an optically pure compound was diluted to 500.0 mL with water and placed in a polarimeter tube 10.0 cm long. The measured rotation was -2.95° at 25 °
Lakes that have been acidified by acid rain (HNO3 and H2SO4) can be neutralized by a process called liming, in which limestone (CaCO3) is added to the acidified water. What mass of limestone (in Kg)
An acid solution is 0.100M in HCl and 0.210 M in H2SO4. What volume of a 0.160 M KOH solution would have to be added to 550.0 mL of the acidic solution to neutralize completely all of the acid
According to the Henderson-Hasselbalch equation shown below, what equilibrium is established for the given acid/base reaction if pH = pKa - 2