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A 135.0 L weather balloon filled with 4.9 moles of helium has a small leak. If the helium leaks at a rate of exactly 10mmol/hr what is the volume of the balloon after 72 hours
A chemist must prepare 0.9 L of sodium hydroxide solution with a pH of 13.40 at 25 C. He will do this in three steps: Fill a 0.9 L volumetric flask about halfway with distilled water
If the electron affinity for an element is a negative number, does it mean that the anion of the element is more stable than the neutral atom. explain
in a batch reactor the decomposition of species a follows n-th order kinetics as a-gtb rk cnthe conversion of a
Which of the following substances form molecular crystals in solid form?
if 6.73 g of Na2CO3 is dissolved in enough water to make 250 ml of solution, what is the molarity of the sodiam carbonate?
Use the Heisenberg uncertainty principle to calculate the uncertainty (in meters) in the position of a honeybee weighing 0.67 and traveling at a velocity of 0.80 . Assume that the uncertainty in the velocity is 0.1. Express your answer using one s..
What is Valence Electrons, Bonds Electrons,Non-Bond, VSEPR, Approx bond Angle, and Geometric Shape of H20
The original concentration of Glucose-6-phosphate is 0.25 M, but when the system reaches equilibrium, only 2.5% of the original glucose-6-phosphate remains. calculate the Keq.
you have a solution of sodium nitrate containing 140 g at 65 degrees celcius. how many additional grams of solute must
A chemist measures the amount of bromine liquid produced during an experiment. She finds that 766.g of bromine liquid is produced. Calculate the number of moles of bromine liquid produced.
a solution contains 100.0 g of water and 15.0 g of alcohol. what is the percent alcohol in the solution? my teacher got
The normal boiling point for acetone is 56.6 degrees Celsius. At an elevation of 5300 ft the atmospheric pressure is 630 torr. What would be the boiling point of acetone (enthalpy of vaporization=32.0 kj/mol) at this elevation? What would be the v..
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