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A 639 keV x-ray photon scatters from an electron at rest, deflecting through 111°. What is the scattered photon's energy?
A beaker with 1.30×102 mL of an acetic acid buffer with a pH of 5.000 is sitting on a benchtop. The total molarity of acid and conjugate base in this buffer is 0.100 M .
When the following epoxide was treated with aqueous acid or base respectively, a pair of isomers were produced. Complete the following reactions explain the formation of each product with a mechanism (include all intermediates formal charges and c..
Determine the procedure to make 250ml of 0.1M H3PO4 from concentrated 85%(by mass) H3PO4.
How many moles of HCL must be added to 1.50L of 1.70M KOH to obtain a pH of 2.00?
What reagent is used to keep the above separation in a weakly basic condition. Why is this necessary
What is the equilibrium constant, K, value (ignore units) at 441.3 K for the following reaction ? N2(g) + 3 H2(g) ? 2 NH3(g) [Note (all at 25oC): (1) Standard enthalpies of formation for N2, H2, and NH3
What is the molarity of a sodium hydroxide solution if 25.0 mL of this solution reacts exactly with 22.30 mL of 0.253 M sulfuric acid?
A sample of nitrogen (9.27g) reacts completely with magnesium, according to the equation: 3 Mg + N2 -> Mg3N2. The mass of Mg consumed is ____g?
The Gibbs free energy G is the thermodynamic potential that is minimized when a thermodynamic system reaches equilibrium. The free energy change of a reaction ?rxnG can be seen as the slope of a curve representing the progress of the transformatio..
Calculate the change in internal energy of the following system: a balloon is cooled by removing 0.657 kJ of heat. It shrinks on cooling, and the atmosphere does 384J work on the balloon.
Write a Lewis structure for each of the following molecules.
If the equilibrium constant (Keq) equals 2.62x1012 for the following reaction between strontium and magnesium:
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