Chemistry: Boiling Point, Ideal Gas Equation, Critical Temperature and more

6 general chemistry questions - i.e. "Atoms of an element, X, have the electronic configuration shown above. The compound most likely to form with magnesium, Mg, is: (a) MgX (b) Mg2X (c) MgX2 (d) Mg2X3 (e) Mg3X2 " *(Please see attachment for complete equations and problems)

Chemistry: Standard Free Energy Change, Atomic Mass, pH, Molality, Molarity and more

8 general chemistry questions involving: standard voltage/free energy exchange, atomic number/mass, pH, balancing equations, molality/molarity and more. Example: When the eqation for the half reaction above is balanced, what is the ratio of the coefficients OH- : Cr02- (a) 1 : 1 (b) 2 : 1 (c) 3 : 1 (d) 4 : 1 (e) 5 : 1 ...continues

Chemistry: Moles, Standard Heat of Formation, Kinetic Molecular Theory of Gases and more

7 general chemistry questions. Example: The reaction of silver metal and dilute nitric acid proceeds according to the equation above. If 0.10 mole of powdered silver is added to 10 milliliters of 6.0-molar nitric acid, the number of moles of NO gas that can be formed is: (a) 0.015 mole (b) 0.020 mole (c) 0.030 mole (d) 0 ...continues

Chemistry: Molarity, Molar Mass, Oxidizing Agents, Mole Fraction and more

7 general chemistry questions. Example: At 20 degrees Celcius, the vapor pressure of toluene is 22 mm Hg and that of benzene is 75 mm Hg. An ideal solution, equimolar in toluene and benzene, is prepared. At 20 degrees Celcius, what is the mole fraction of benzene in the vapour in equlibrium with this solution? (a) 0.23 (b) ...continues

Chemistry: Electronic Configuration, Vapour Pressure, Molecular Weight, Rutherford and more

9 general chemistry questions. Example: A 27.0 gram sample of an unknown hydrocarbon was burned in excess oxygen to form 88.0 grams of carbon dioxide and 27.0 grams of water. What is a possible molecular formula of the hydrocarbon? (a) CH4 (b) C2H2 (c) C4H3 (d) C4H6 (e) C4H10 *(Please see attachment for complete equat ...continues

pressure

Show the calculation for the mass of NaNOsub2 required to produce 40. mL of Nsub2 with a temp. of 25.6 degrees C and an atm. pressure of 739 mmHG. Please give a good simple step by step solution on how to solve the problem please.

heat

Please give complete answers and details on how to think about these problems. Also, explain reasoning on how you get your answer please! Predict the signs of q and w for the following: A. Condensing water in an exothermic process at P=1 atm and T=370K. H20(g) -> H20(l) B. Subliming CO2(dry ice) - an endothermic pro ...continues

oxidation

Please give step by step answers. 1) Assign oxidation numbers for each of the following atoms in the redox reaction given below. 2H^+(aq) + 2HNOsub2(aq) + 2I^- -> 2NO(g) +2H2O(l) +Isub2(s) a) Oxidation numbers for each b) which atom is being reduced and why. c) Which atom is being oxidized and why. d) Which mo ...continues

pv=nrt

Please give step by step answers with conversions please! 1) Bromine gas reacts with flourinne gas to give a low boiling liquid. A sample of this liquid is vaporized at 42.0degrees C into a flask with a volume of 252.2mL. The atmospheric pressure is 726.3 torr. The flask is found to contain 1.632 g of the compound. a) C ...continues

buffer solution

Question: Which one of the following combinations cannot function as a buffer solution? HCN and KCN NH3 and (NH4)2SO4 HONO2 and NaNO3 HF and NaF HONO and NaNO2