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Suppose that there is 2.43 mol of nitrogen gas in an insulated, sealed 31.7-L container initially at 285 K. The specific heat of nitrogen gas is 1.04 kJ kg-1 K-1 (note units). If a 5.44-kg block of iron at 755 K is placed in this container and it is sealed again (with no loss of nitrogen), what is the fi nal pressure of the nitrogen gas?
a) Write the balance equation for the reaction. b) How many moles of O2 are needed to completly react with 4.0 mol of C2H6O? c) If a car produces 88 g of CO2, how many grams of O2 are used up in the reation
a 15.5 ml sample of 0.215 m koh soultion required 21.2 ml of aqueous acdic soultion in a titration experiment.
an aqueous vinegar sample contains 5.4 acetic acid by mass and has a density of 1.006 gml. calculate the amount of
Nitric oxide (NO) has recently been discovered to have many important biological functions in the immune system, in the transmission of nerve impulses, and in the treatment of heart disease. Nitric oxide is a highly reactive compound.
The below table lists pressure and volume measurements for air in a cylindrical piston of an air compressor. The variables may be assumed related
The hydroxyl radical, OH, is important not only in atmospheric chemistry but also in cell biology, as it participates in biochemical reactions as a free radical.
For the reaction A-----)products successive half-lives are observed to be 10.0, 20.0 and 40.0 min for an experiment in which [A]o= 0.10 M Calculate the concentration of A at the following times.
Compare alkalide ion with the neutral alkali atom - For a given alkali metal, how does the ionic radius of the alkalide ion compare to that of the neutral alkali metal atom? Explain using physical arguments.
A weak acid HA (pKa = 5.00) was titrated with 1.00 M KOH. The acid solution had a volume of 100.0 mL and a molarity of 0.100 M. Find the pH at Vb = 0 mL, Vb = 10.1 mL and Vb = 12.0 mL
2C_4H_{10}{(g)}+13O_2 {(g)}\rightarrow 10H_2O{(g)}+8CO_2{(g)} USE the balanced equation to answer both! Calculate the mass of water produced when 2.99 of butane reacts with excess oxygen. Calculate the mass of butane needed to produce 98.2g of car..
Calculate (a) the volume occupied by 8.2 mmol of the gas under these conditions and (b)an approximate value of the second virial coefficient B at 300 K.
a solution of a and b with 30 mole percent of a is in equilibrium with its vapour which contains60 mole percent of a.
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