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The reaction A->B follows first-order kinetics with a half-life of 21.7 hours. If the concentration of A is 0.023 M after 48 hours, what is the initial concentration of A? The answer is 0.11M can you please show how they derived at this answer
If your front lawn is 15.0 feet wide and 20.0 feet long, and each square foot of lawn accumulates 1350 new snow flakes every minute, how much snow (in kilograms) accumulates on your lawn per hour?
Calculate the solubility product constant for Pb(IO3)2 (4.3 x 10^-5 M), given that the molar concentration of saturated solution is as indicated in parenthesis.
Dimethyl hydrazine ignites spontaneously upon contact with dinitrogen tetroxide. If 2 mol of dimethyl hydrazine are mixed with 4 mol of dinitrogen tetroxide, and the reaction an 85% yield, how many moles of N2, H2O and CO2 will be produced?
Why is modulating ligand concentration not sufficient for adequate control of signaling in an organism? Sketch a diagram of a G-protein coupled receptor cascade, and indicate the possible actions that can be taken by a cell to inhibit the signal.
should be used to make 2.00 L of 0.0500 M solution? What kind of flask is used to prepare this solution?
Use the Nernst Equation to calculate Ecell at 25 C for electrolysis of aqueous sodium chloride if the concentration of chlorine in the brine solution is 4.5 M and the partial pressure of Cl2 is 0.001 atmospheres.
How would you synthesize Acetophenone starting from an Alkene? Identify and draw the structure of the starting compound
One method used to store energy during times of low demand is by pumping water uphill into a reservoir. When energy demand exceeds the output produced by power plants
The extract from solution 3 was found to be 0.0225M in HA. Assume that HA does not associate or dissociate in the organic solvent, calculate
Calculate the atomic mass of neon (Ne) which is composed of three naturally occurring isotopes with the following natural abundances and masses
Consider all the valence electron pairs of the central atom-both those that are shared in covalent bonds, called bonding pairs, and those that are unshared, called non-bonding pairs or unshared pairs.
What is the molarity of ZnCl2 that forms when 30.0 grams of zinc completely reacts with CuCl according to the following reaction? Assume a final volume of 275.
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