Get college assignment help at uniessay writers Imagine that you have a 6.00 L gas tank and a 4.50 L gas tank. You need to fill one tank with oxygen and the other with acetylene to use in conjunction with your welding torch. If you fill the larger tank with oxygen to a pressure of 135 atm, to what pressure should you fill the acetylene tank to ensure that you run out of each gas at the same time? Assume ideal behavior for all gases.
The carbon-14 decay rate of a sample obyained from a young tree is .277 disitegration per second per gram of the sample. Another wood sample prepared from an object recovered at an archaeological excavation gives a decay rate of .178 disintegration per second per gram of the sample. What is the age of the object?
Consider the reaction shown below. 4 PH3(g) P4(g) 6 H2(g) If, in a certain experiment, over a specific time period, 0.0033 mol PH3 is consumed in a 1.5-L container each second of reaction, what are the rates of production of P4 and H2 in this experiment?
From the following list of aqueous solutions and water, select the one with the lowest freezing point. A. 1.5 M CH3OH, methyl alcohol B. pure water C. l 0 M LiClO4 D. l.0 M CaSO4 E. 0.75 M (NH4)3PO4
A piston has an external pressure of 11.0 . How much work has been done if the cylinder goes from a volume of 0.150 liters to 0.480 liters
If 5.4 kcal of heat is added to 1.00 kg of water at 100 degrees celsius, how much steam at 100 degrees is produced? Please show your work for your answer.
The half-life of radium-226 is 1600 years. How many grams of a 0.25g sample will remain after 4800 years?
reducing reagent for Mg NiO2 2H2O → Mg(OH)2 Ni(OH)2
Estimate the volume, V, of one sodium atom (Na) using its metallic radius of 186 pm. Express the answer in cubic picometers.
explain the mechanism of a double replacement reaction?
Get college assignment help at uniessay writers Lead(II) sulfide reacts with hydrogen peroxide to form lead(II) sulfate and water. How many grams of hydrogen peroxide are needed to react completely with 265 g of lead(II) sulfide?
What advantage is there to testing a solution with pH paper versus using an acid/base indicator?
Why is it necessary to test pH of water to compare with other chemicals?
Consider the arrangement of bulbs shown in the drawing. Each of the bulbs contains a volume of gas as shown. PN2 = 650. torr, PNe = 206 torr, and PH2 = 402 torr. What is the pressure of the system when all the stopcocks are opened, assuming that the temperature remains constant?
If I burn 0.315 moles of hexane (C6H14) in a bomb calorimeter containing 5.65 liters of water, what’s the molar heat of combustion of hexane is the water temperature rises 55.4 ºC? The heat capacity of water is 4.184 J/g ºC .
Calculate the molar solubility of Sn(OH)2 in a solution with a pH of 11.0 knowing that the Ksp (Sn(OH)2)= 1.4×10^-28
hybridization of the central S in S2Cl2
Tetrafluoroethylene, C2F4, can be converted to octafluorocyclobutane which can be used as a refrigerant or an aerosol propellant. A plot of 1/[C2F4] vs. time gives a straight line with a slope of 0.0448 L mol-1s-1. What is the rate law for this reaction?
(f) What is the mass of exactly 500 molecules of chloral hydrate? 6 g
Consider a light-sensative reaction. What energy in joules per photon, is needed to drive the reaction if delta H of the reaction is equal to 793 kJ/mol. (Remember that there are Avogadro’s number of photons per mole of photons.)
Nitrogen and oxygen gases react to form dinitrogen trioxide gas. 2 N2(g) 3 O2(g) 2 N2O3(g) At a certain temperature and pressure 2.8 L of N2 reacts with 4.2 L of O2. If all the N2 and O2 are consumed, what volume of N2O3, at the same temperature and pressure, will be produced?
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