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If the rate constant at a particular temperature is 3.7*10^-6 mol/L*sec, how long will it take for an ammonia concentration to drop from an initial concentration of 5.0*10^-4 M to 5.0*10^-5 M? What
Calculate the volume of carbon dioxide at 20.0 degrees C and 0.910 atm produced from the complete combustion of 5.00 methane. Compare your result with the volume of CO2 produced from the complete co
What is the PH of the buffer that results when 12.0 g of NaH2PO4 and 8.00 g of Na2HPO4 are diluted with water to a volume of .50 L? (Ka of H2PO4=6.2*10^-8, the molar masses are 120.0 g/mol and 142.
What is the pH of a solution of 0.700 M K2HO4, potassium hydrogen phosphate. What is the pH of a solution of 0.450 M KH2PO4, potassium dihydrogen phosphate
According to valence bond theory, the triple bond in ethyne (acetylene, C2H2) consists of A) three sigma bonds and no pi bonds B) two sigma bonds and one pi bond C one sigma bond
How does electron configuration work. If I have [Ar]3d^5 as an example how do know what it actually equals
Construct a delta H and delta S table, including the four possibilities associated with the two possible signs for each of delta H and delta S. Discuss the resulting sign of delta G and the spontane
The second law states that the entropy of the universe (system and surroundings) increases in a spontaneous process : delta Ssyst + delta Ssurr is greater than or equal to 0.
What is the ratio of enantiomers of 2-octanol in the product mixture? 55% (S) and 45% (R). However, I am not sure how to draw the structure of the major enantiomer produced in this reaction. Indicat
Calculate the energy required to heat 1.30 kg of ethane gas (C2H6) from 27.0°C to 78.0°C first under conditions of constant volume and then at a constant pressure of 2.00 atm.
The amount of nut burned was 0.9905g. How many of these nuts would a 64kg person have to eat to obtain enough energy to bike (racing)for 30min? The amount of bicycling (racing) is 0.127
For the following battery: Cd(s) | CdCl2(aq) || Cl-(aq) | Cl2(l) | C(s) Write the reduction half-reaction occuring at the C(s) electrode. (Include physical states of reactants and products.) From wh
using vsepr molcule determine Electron Domain and Molcules for? CH3I ClF3 H2S SO3 SO4^-2 Nh4 NH2^- CO3^-2 ICI2
A mixture of CaCO3 and (NH4)2CO3 is 60.7% CO3 by mass. Find the mass percent of CaCO3 in the mixture.
The heat energy required to melt 1.00 g of ice at 0 degrees C is 333J. If one ice cube has a mass of 62.0 g, and a tray contains 16 ice cubes, what quantity of energy is required to melt a tray of i
Compare photons of X-ray and microwave radiation. Which has A) the longer wavelength, B) the greater frequency and C) the greater energy
If there is no such evidence, then we have no reason to believe in witches. If there is evidence, we do have reason to believe in witches. There is no such evidence. Therefore we have no reasons to
Determine the number of carbon atoms in the compound. Natural abundances: 12C is 98.93% and 13C is 1.07%
If a non-cyclic alkane shows a molecular ion peak at m/z 2.40 × 102, what is the chemical formula
An aqueous solution of a monoprotic acid HA (Ka = 4.33×10-1) has a pH of 4.88. What is the molarity of the solution? (i.e. [HA]+[A-].)
A 182-g sample of gold at some temperature is added to 22.1 g of water. The intitial water temperature is 25.0 degrees C, and the final temperature is 27.5 degrees C. If the specific heat capacity o
Determine the fraction of the energy radiated by the sun in the visible region of the spectrum (350 nm to 700 nm). (Assume the sun's surface temperature is 5800 K.)
Calculate the pH of a 7.40×10^-1 M aqueous solution of sodium fluoride (NaF). (For hydrofluoric acid, HF, Ka = 7.20×10^-4)
Which of these elements occupies a position on the periodic table that is not entirely consistent with its chemical properties
Basic properties are characteristic of all alkaline earth metal oxides except one. The formula of this exception is? BeO, MgO, SO2, B2O3, CaO