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1) O2 is generated into a 250mL beaker by water displacement at a pressure of 730 torr and a temperature of 25C. What is the volume O2 at STP?
2) A 97.6 mL sample of hydrogen gas is collected by water displacement at 20C. The atmospheric pressure in the laboratory is measured to be 771.5 torr. How many milligrams of hydrogen does the sample contain?
25g of sodium bicarbonate is weighed on a triple beam balance and 3.0M hydrochloric acid is squirted. Do you break up the sodium bicarbonate
how many grams of the element nickel are contained in 10.0g of a 10.2 wt solution of nicke sulfate hexahydrate
At 500°C and 93.2 kPa, the density of sulphur vapour is 3.71 g L-1. What is the molecular formula for sulphur under these conditions, given that the atomic mass of sulphur is 32.06 g mol-1?
What is the images distance from the lens? What is the size of the image? What is the magnification of the image? Show all work
The Al2O3 does not react. If the sample residue weighs 2.456 g, what is the mass fraction of Fe2O3 in the original sample?
The heat of vaporization of water at 100°C is 40.66 kJ/mol. Calculate the quantity of heat that is absorbed/released when 9.00 g of steam condenses to liquid water at 100°C.
In one molecule of monomethylarsonic acid how many valence electrons are there?
What range of magnetic field strength would be required to cover the mass range between 16 and 625, for singly charged ions, if the accelerating voltage is held constant?
Problem- Which is harder analytical chemistry or organic chemistry 1. I have the option of choosing either to retake orgo 1 or take analytical. I previously took organic chemistry 1 and didn't do too well.
The number of vacancies in some hypothetical metal increases by a factor of 6 when the temperature is increased from 1100 K to 1200 K. Calculate the energy (in J/mol) for vacancy formation assuming that the density of the metal remains the same ov..
Predict the products for the following set of reactants- PCl3(l) + H2O(l) ? (You are just asked to determine the products and not necessarily balance the equation)
How many molecules of water are produced when 143 molecules of acetylene (HCCH) to react in excess oxygen produce carbon dioxide and water.
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