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An empty pressure vessel weighing 5 kg is placed in a water bath at 170 oC. It is slowly filled with n-Pentane while the vessel pressure is monitored. As soon as a jump in pressure is detected the f
If a 0.0200 M solution exhibits 50.0% transmittance, what will be the percent transmittance for a 0.0400 M solution of the same substance measured at the same wavelength?
Why we call benzene phenyl and not benzyle when one hydrogen is removed because in case of alkanes we name them alkyl on the removal of one hydrogen atom?
how many moles of molecular hydrogen are consumed per mole of the precatalyst in order to convert it entirely to platinum metal?
Dinitrogen monoxide n2o decomposes producing nitrogen and oxygen gases.calculate the total volume of produced gases at STP. When 8.8 grams of dinitrogen monoxide decomposes.
Suppose that a sample of gas occupies 192 mL of volume at 25C and a pressure of 206 torr. What would be the volume if the pressure were changed to 506 torr at 25C?
The mass of the first block is 1224 g, and its velocity is +0.685 m/s after the bullet passes through it. The mass of the second block is 1555 g. (a) What is the velocity of the second block after t
If we assume the individual drank all of the alcohol at once (i.e. no metabolism of alcohol by the body), the total volume of blood for the individual was 1.5 gallons, and the individual was drinkin
Determine the entropy change of the system when 0.750 g of ethanol (C2H5OH) evaporates, given ΔH vaporization is 40.5 kJ/mol and the normal boiling point of ethanol is 78.5 °C.
when 50.0 grams of acetylene is allowed to react with excess oxygen, 75.0 grams of CO2 are formed. What is the percent yield of carbon dioxide?
Atmospheric pressure is 29.86Hg. What is the absolute pressure in psia being measured? The density of mercury at 70F is 13.543g cm^-3.
a solution which is 37.2 mass% hcl has a density of 1.19g/ml.what mass of hcl is contained in 30.0ml of a solution.
The standard free energy change for the formation of N2H4(l) from elements is +149 kJ/mol at 25 °C. What is the equilibrium constant for the reaction? (R = 8.314 J/K·mol)
What is the standard cell potential of a Cr-Hg cell? (Remember to switch one-half reaction to oxidation and to balance the number of electrons--use paper.)
If 43 g of hot water at 85°C is poured into a cavity in a very large block of ice at 0°C, what will be the final temperature of the water in the cavity?
A first-stage recovery of magnesium from seawater is precipitation of Mg(OH)2 with CaO: What mass of CaO, in grams, is needed to precipitate 1000lb of Mg(OH)2?
Calculate the standard cell potential (E^circ) for the reaction rm X {(s)}+ rm Y^{+}{(aq)} rightarrow rm X^{+}{(aq)}+ rm Y {(s)}
A quantity of N2 originally held at 3.80 atm in a 1.00L container at 26oC is transferred to a 10.0L container at 20oC. A quantity of O2(g is originally at 4.75 atm and 26oC in a 5.00L container is t
Which of the following alkenes can exhibit cistrans isomerism?
A mixture containing 3.9 mole of NO and 0.88 mole of CO2 was allowed to react in a flask at a certain temperature according to the following equation
A toy train is pushed forward and released at = 2.0 with a speed of 1.5 . It rolls at a steady speed for 2.8 , then one wheel begins to stick. The train comes to a stop 5.6 from the point at which i
What is the molarity (M) of a solution that contains 2.08 grams of NaOH (MM = 40.00 g/mol) in 79.65 mL of solution?
Draw the skeletal structure of one of the enantiomers (that means you have to show wedge/dash bond(s)) formed when (Z)-3-methyl-2-pentene reacts with Br2 in the presence of water.
Consider the following equilibrium: Ag+(aq)+Cl-(aq)<-->AgCl(s). Use Le Chatelier's principle to predict how the amount of solid silver chloride will change when the equilibrium is disturbed by
2C4H10 + 13O2 → 8CO2 + 10H2O. How many moles of O2 are needed to react with 3.75 moles of C4H10?