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A gas cylinder filled with nitrogen at standard temperature andpressure has a mass of 37.289g. The same container filled withCO2 at STP has a mass of 37.440g. When filled withan unknown gas at STP, the container mass is 37.062g. Calculate the molecular weight of the unknown gas, and then state its probableidentity.
Which of the experimental results for the photoelectric effects suggest that light can display particle-like behavior
what is the acid-ionization constant ka for the ionization of acetic acid shown in the reactionch3coohaq h2ol
which equation best describes the average rate for the reaction shown. A (aq) + B 9aq) -----> C (aq) + D (aq) A. rate= [C] [D] / [A] [B] B. rate= - deltat/-deltaB C. rate= -delta[C]/delta t D. rate= -delta[A]/delta t E. rate= [A] [B]/ [C] [D]
Acetic acid solution is titrated with NaOH solution. What is the pH at half the euivalence point?
Aluminum sulphate is used in sand paper, among other uses. How many g of aluminum oxide dihydrate will be needed to produce 500 g of aluminum sulphate by the (unbalanced) reaction below? Al2O3 •2H2O + H2SO4 Al2(SO4)3 + H2O
what would be the effects when changing the eluting solvents
Explain why it would have been inadvisable to supply hydrogen and sodium in elemental form and why it is not neccessary.
In Complex III, electrons are transferred between ubiquinone and cytochrome c. Standard reduction potentials are, write a balanced equation for this reaction and calculate the overall cell potential and free energy change.
Draw the structure(s) of all carbocations that could potentially form from the alkene and label each carbocation as primary, secondary or tertiary. 2-methylpropene
A turn-of-the-century chemist isolated an aromatic compound of molecular formula C6H4Br2. He carefully nitrated this compound and purified three isomers of formula C6H3Br2NO2, one of which was obtained in very small amounts. Propose a structure fo..
A student weighed out 0.1225 g of the unknown copper bromide salt and carried out a titration like the one you performed in week 4. If the sample required 17.00 mL of 0.03525 M thiosulfate solution to reach the endpoint, what is the percent by ma..
Write net Bronsted equations and determine the equilibrium constants for the acid-base reactions that occur when aqueous solutions of the following are mixed.
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