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How many grams of KNO3 are needed to make 450 mL of a solution that is to contain 5.50 mg/mL of potassium ion? Calculate the molarity of the solution.
What mass of methane, CH4, is contained in a 500.-mL sample of CH4 at STP?
what are the freezing point and boiling point of an aquenous solution of 15.5g glucose c6h12o6 dissolved in 150 g of
Enough of a monoprotic acid is dissolved in water to produce a 0.0137 M solution. The pH of the resulting solution is 6.48. Calculate the Ka for the acid.
Calculate the heat of the reaction. (Use the equation Q = s . m .?T where s is the specific heat, m is the mass of solution and ?T is the change in temperature)
How are the opposing pathways of glycolysis and gluconeogenesis prevented from extensive futile cycling? a) The catabolic and anabolic pathways do not take place in the same part of the cell
a 50.0 gram piece of iron at 152 degrees celsius is dropped into a 20.0 grams of water at 89 degrees celsius in an open
show that the function y=y(x) =Asin(kx) satisfies that equation d^2y/dx^2 = -k^2y if A and k are constants. This is an example of a differential equation.
How do I express quantities using significant figures to imply errors. An example question is 1.989 +/- 0.0003
A gas at 39°C occupies a volume of 1.67 L. At what Celsius temperature will the volume increase to 2.12 L?
Draw the major E2 reaction product formed when trans-1-chloro-2-ethylcyclohexane reacts with hydroxide ion in DMSO
What is the volume of 0.5694 moles of gold? Density of gold is 19.30 g/mL The atomic mass of gold is 196.97.
Use the standard reduction potentials to find the equilibrium constant for the following reaction at 25 degree Celcius:
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