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The decomposition of nitrogen dioxide to nitrogen and oxygen is second-order with a rate constant k = 12.5 M-1 s-1. What is the half-life for the reaction if [NO2]0 = 0.00260 M?
a scientist measures the standard enthalpy change for the following reaction to be -889.4 kj 2nh3g 3 n2og 4n2g 3
what is the percent yield of a reaction in which 228. g phosphorus trichloride reacts with excess water to form 118 g
80.0 of is initially at room temperature (22.0). A chilled steel rod at 2.0 is placed in the water. If the final temperature of the system is 21.2, what is the mass of the steel bar
The total molarity of acid and conjugate base in this buffer is 0.100 M . A student adds 7.90 mL of a 0.440 M HCl solution to the beaker. How much will the pH change? The pKa of acetic acid is 4.760
Calculate how much energy in the form of heat is available from 100mL of this mixture and compare it with the amount available from pure gasoline
A proton in a linear accelerator has a de Broglie wavelength of 143 pm. What is the speed of the proton?
How many grams of oxygen can be added to the balloon before it pops? Assume the balloon had no gas in it before oxygen is added.
If the sign for delta G is negative (spontaneous process) and the sign for delta S is positive (more disorder) for both dissolving processes, how could one be endothermic (positive delta H) and one be exothermic
a 1.50 l buffer solution is 0.250 m in hf and 0.250 m in naf. calculate the ph of the solution after the addition of
distance between two consecutive peaks or troughs. frequency number of waves per second that pass through a given
The formal charge on the P atom is zero and It is best described with three resonance structures.
Assume that you have a cylinder with a movable piston. What would happen to the gas pressure inside the cylinder if you do the following? Decrease the volume to one third the original volume while holding the temperature constant.
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