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How many miles of carbon atoms are present in a 25 gram sample
Pyridine(C5H5N) is a weaker base in H2O than 2,6 lutidine (dimethylpyridine), but we observe that the pyridine-BF3 complex is more stable than the comparable lutidine-BF3. Explain the reason for this inversion in stabilities.
the specific heat of ethylene glycol is 2.42 J/g-K. How many J of heat are needed to raise the temperature of 62.0 g of ethylene glycol from 13.1 C to 40.5 C ?
a 58.7g piece of iron at 67 degrees celcius is placed in a vessel containing 60.0g of water at 22 degrees celsius. the
Assume you have a material in which an equal number of electrons and holes are available to transport charge. If the resistivity of this material is 3.15 x 10-1Ω-m and the number of each type of charge carrier is 1 x 1013 cm-3, estimate the mobili..
At a temperature of 435C and a pressure of 715 mmHg, how many grams of NH3 can be produced when 4.50 L of NO2 react?
Suppose you are given a 2.75 g sample of the orginal mixture. You isolated the pure metal from the other components and determined that the mass of the metal was 1.25 g. What is the percent by weight of the metal in the orginal sample
a cylinder measuring 5.7 cm wide and 6.8 cm high is filled with gas. the piston is pushed down with a steady force
A.E. Dyer supplied 45.9 cal of heat energy to a 156-g piece of aluminum block that was kept at 28 degree C. What is the final temperature of the aluminum block?
Question- I performed an experiment to study the electrochemical cells and reduction potentials. I have to complete the following- 2) Sketch an apparatus that could be used to study the reaction shown in the following equation
Problem- What is the delta E for the following, balanced reaction: 2HCl(g) + CaO(s) rightwards arrow from blank to blank of H2O(g) + CaCl2(s) if for that reaction delta H = -211.1 kJ?
An experiment was carried out similar to the one carried out to determine the empirical formula of magnesium oxide. The empirical formula for an oxide of chromium is required
Initially a mixture contains 0.601 mol each of N2 and O2 in an 7.65-L vessel. Find the composition of the mixture when equilibrium is reached at 3900°C. For the reaction below, the Kc = 0.0123 at 3900°C. N2(g) + O2(g) 2 NO(g)
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