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Pentaerythritol tetranitrate, a.k.a., PETN, is one of the most powerful explosives known. It has a density of 1.77 g/cm3. Find (1) the volume of a 227 g (about 1/2 pound) quantity of the explosive before the explosion and (2) the volume of total gas produced after the explosion. Assume STP conditions:
C(CH2ONO2)4 (s) → 2CO(g) + 4H2O(g) + 3CO2(g) + 2N2(g)All numbers immediately following elemental symbols are subscripts. You must show all work to receive credit. (HINT: You can use density to find the initial condition for volume of the solid. You can then use the mol of gaseous products to determine volume of final condition since you know molar volume at STP
In nitration of bromobenzene to form bromonitrobenzene, why is para substitution favored over ortho and meta substitution
Which os the dollowing statements is correct concerning the equivalence point in a titration of a weak acid (HA) by a strong base? The pH is less than 7 because HA is a weak acid
baseball reporters say that long fly balls that would have carried for home runs in july die in the cool air of october
In a first order decomposition in which the rate constant is 0.201 sec-1, how long will it take (in seconds) until 0.131 mol/L of the compound is left, if there was 0.566 mol/L at the start
A 184-mg sample of Na2CO3 is dissolved in H2O to give 3.00L of solution. What is the concentration of Na+ in parts per million (ppm)?
A 5.0 ml sample of vinegar was titrated with 7.2 ml of 0.55 M NaOH. if the density of vinegar solution is 1.00g/ml, what is the mass percent of acetic acid present.
A solution of ammonia and water contains 4.70×10 water molecules and 5.50×10 ammonia molecules. How many total hydrogen atoms are in this solution?
How many kJ of heat are required to produce 13.7g NO2, by 2NO2+ O2 --> 2NO2. the heat of reaction is 113.04
A 0.1500 g sample of pure ZnCl2xnH20 was placed on an ion-exchange column in the H+ form. The H+ released in the eluate required 16.98 mL of 0.1024 M NaOH to reach a phenolphtalein end point. Calculate the percent zinc in the sample.
Calculate the necessary amounts of solutes and solvents to make a 4L bottle of antifreeze that will cause a 35 degree change in the freezing point of water. Solutes are Al2(SO4)3, KBr and Mg(NO3)2
The difference in the mass of 100 moles each of sodium atoms and sodium ions is 5>48002 g. Compute the mass of an electron.
The active site of an enzyme can perturb the pKas of amino acid side chains such that they are raised or lowered from what we would expect given the pKa values of the free amino acids.
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