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Methane gas is compressed from 31 L to 2.5 L at a constant temperature. The final pressure is 18.3 atm. What was the original pressure?
in the following experiment a coffee-cup calorimeter containing 100. rm ml of rm h2o is used. the initial temperature
a 24.9 ml volume of hcl reacts completely with 55.0 ml of aqueous na2co3. the reaction is as follows2hcl aq na2co3aq-gt
The hydrogen carbonate ion can act as both an acid and a base. Write out two equations which demonstrate this and calculate (or look up) the equilibrium constants for both expressions
If calcium carbonate is the active ingredient in many antacid tablets and two tablets combined contained 1.50 grams of calcium carbonate, explain how many grams of stomach acid (HCL) will be consumed in the expected reaction assuming that the prod..
Plutonium-241 has a half-life of 14.4 years and decays to Am-241. Em-241 has a half life of 432.7 years and decays to NP-237. If you bury 100 curies of Pu-241 today, how much Pu-241 and Am-241 will be present in 100 years
Write the equations for the following reversible systems A) solid KMnO4 in a saturated aqueous solution of KMnO4 B) a mixture of solid and gaseous forms of CO2 in a closed container
Calculate the number of kilograms of helium required to inflate a balloon with a volume of 100.000 L at a pression of 250 mmHg and atmospheric temperature of -35 ° C.
a polysaccharide of unknown structure was isolated subjected to exhaustive methylationmethylation denotes the addition
2 liquids, A and B, have the same molecular weight. Samples of each are placed on temperature probes and allowed to evaporate. After a period of time Liquid A had a change in temp
Carbon tetrachloride may react with oxygen to produce chlorine and carbonyl chloride.2CCl4(g) + O2(g) 2COCl2(g) + 2Cl2(g); Kc = 9.9 × 10^51. What is Kc for the following equilibrium? COCl2(g) + Cl2(g) CCl4(g) + ½O2(g)
Which solution has highest pH? A. 15 mM formic acid (Ka = 1.77 × 10-4) B. 15 mM Acetic acid (Ka = 1.74 × 10-5) C. 15 mM MES (Ka = 7.06 × 10-7) D. 15 mM NaH2PO4 (Ka = 6.2 × 10-8) E. 15 mM Tris-hydroxymethyl aminomethane (Ka = 8.32 × 10-9)
How many grams of ethanol (C2H5OH) (MW C2H5OH= 46.07 g/mol) would have to be burned to produce 450 kJ of heat
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