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a balloon is filled with helium. its volume is 5.9 at 26degrees celcius. what will be its volume at 278 degrees celcius?
Sulfur-38 has an atomic mass of 38.0 and a half-life of 2.87 hours. How long will it take for 99.99% of a sample of sulfur-38 to decay.
what is the molarity of an aqueous solution containing 360g of glucose in 2.0L of solution.
a step by step answers for those Question please. Please be brief. What is the PH of a buffer prepared by combining 25mL of 0.1M nitrous acid with 25mL of 0.1M sodium nitrite?
The boiling point of a solution containing 10.44 g of an unknown nonelectrolyte in 50.00 g of acetic acid is 159.2°C. What is the molar mass of the solute?
In photosynthesis, plants use energy from the sun in combination with carbon dioxide and water to form glucose (C6H12O6) and oxygen. If 4.50 moles of water react with carbon dioxide, what mass of glucose is produced?
A sample consisting of various gases contains 3.4 10-6 mole fraction of radon. This gas at a total pressure of 33 atm is shaken with water at 30°C. Calculate the molar concentration of radon in the water.
An alloy, initially weighing 50 grams, contains 90 atomic% silver and 10 atomic% copper. How many grams of copper would have to be added to make the alloy 12 atomic% copper?
While in Europe, if you drive 107 km per day, how much money would you spend on gas in one week if gas costs 1.10 per liter and your car's gas mileage is 26.0.
A patient needs 0.004g of a sulfa drug. There are 5.00mg tablets in stock. How many tablets should be given.
Using K=3.9 as the equilibrium constant, Keq, Compute the amount of Isoamyl acetate, also known as isopentyl acetate (C7H14O2 )that must be present at equilibrium.
Calculate the concentration of sodium ion in a solution made by diluting 350.0 mL of 3.00 M sodium carbonate to a total volume of 2.00 L.
What is the volume in mL of 0.833 M HCl(aq) needed to reach halfway to the equivalence (stoichiometric) point in the titration of 23.5 mL of 0.270 M ethylamine
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