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Why do the group 5A elements have relatively small electron affinities compared to the neighboring nonmetals in the corresponding rows
Calculate the mass, in grams, of Ag2CrO4 that will precipitate when 50ml of 0.20M AgNO3 solution is mixed with 40ml of 0.10M K2CrO4 solution. Assume that Ag2CrO4 is completely insoluble (its Ksp is ~ 0).
How many air molecules are in a 10.0x20.0x10.0 ft room? Assume atmospheric pressure of 1.00atm , a room temperature of 20.0C , and ideal behavior.
What combination of a molecular base and a salt of the conjugate acid of the chosen molecular base should you select to prepare a buffer solution that would maintain a pH of 10.00?
What is the [H3O+] of a solution that is 0.0100 M in HOCl
A chemical reaction releases 58,500 J of heat into 150 g of water. Assuming no heat is lost to the surroundings
What are the advantages and disadvantages of natural products as lead compound?
The mass of a cube of iron is 439 g. Iron has a density of 7.87 g/cm3. What is the mass of a cube of lead that has the same dimensions?
A sample of nitrogen occupies a volume of 546 mL at STP.What volume would nitrogen occupy at 177C under a pressure of 380 torr?
For many years drinking water has been cooled in hot climates by evaporating it from the surfaces of canvas bags or porous clay pots. How many grams of water can be cooled from 39°C
An evaluation of R was performed, following the procedure described in this module. The barometric pressure was 736 torr, the temperature was 295 K, and the volume of hydrogen gas collected was 35.6 mL. The calculated value of R was 82.1mL atm K-1..
what effect will that have on the delta T values when the initial value is measured with the thermometer and the latter is measured with the temperature probe? How will this affect the calculated change in heat of that substance?
total of 2.00 moles of a compound is allowed to react in a foam coffee cup that contains 122 gm of water. The reaction caused the temperature of the water to rise from 21.0 to 24.7
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