What is the name used to describe the situation when a compound containing an ion in common with a dissolved substance is added to a solution at equilibrium which shifts the equilibrium?
A serving of fish contains 4.0 g of fat and 50. g protein. If the caloric value of protein is 4 kcal/g and fat is 9 kcal/g, how many kcal are in the serving? Round the answer to the tens place
Consider the following first order reaction for the decomposition of dinitrogen pentoxide:
N2O5 (g) <img width="16" height="13" align="bottom" src="https://sciemce.com/files/3/ppg__examview__images__C_PP3e_Ch_13_mc106-1.jpg" border="0"> 2 NO2 (g) + O2 (g)At 70 °C, the rate constant, k, for this reaction equals 6.82 ´ 10-3 s-1. If the initial concentration of N2O5 equals 0.0125 M, how long would it take for the concentration of N2O5 to reduce to 0.00500 M?
Use the bond enthalpy data given to estimate the heat released when 25.0 g of acetylene gas, C2H2, burns in excess oxygen to yield carbon dioxide and water vapor at 25°C.BE(C-C) = 347 kJ/molBE(C≡C) = 812 kJ/molBE(C=O in CO2) = 799 kJ/molBE(C-H) = 414 kJ/molBE(O-H) = 460 kJ/molBE(O=O) = 498.7 kJ/mol
The following reaction is at equilibrium at a pressure of 1 atm, in a closed container. NaOH(s) + CO2(g) <img src="https://sciemce.com/files/4/ppg__ttt0827191225__f1q687g1.jpg" alt="" style="vertical-align: 0.0px;" height="12" width="24" />NaHCO3(s) ΔH°rxn < 0Which, if any, of the following actions will decrease the concentration of CO2 gas present at equilibrium?
A metal crystallizes in a face-centered cubic lattice. The radius of the atom is 128 pm and the density of the element is 8.92 g/cm3 . What is the identity of the metal?
Copper is electroplated from CuSO4 solution. A constant current of 4.06 A is applied by an external power supply. How long will it take to deposit 1.00 ×10^2 g of Cu? The atomic weight of copper is 63.546
Combustion analysis of 0.600 g of an unknown compound containing carbon, hydrogen, and oxygen produced 1.043 g of CO2 and 0.5670 g of H2O. What is the empirical formula of the compound?
Which of the following is observed when a nuclide is formed in an excited state and then decays to its ground state, with the release of electromagnetic radiation?
How many grams of lead(II) chloride is produced if 13.87 g lead(II) nitrate combines with excess hydrochloric acid to produce lead(II) chloride and nitric acid?
A solution is prepared by adding 100 mL of 0.2 M hydrochloric acid to 100 mL of 0.4 M sodium formate. Is this a buffer solution, and if so, what is its pH?
Select True or False: The reaction 3H2(g) + N2(g) <img src="https://sciemce.com/files/4/ppg__tttt0818190827__f1q437g1.jpg" alt="" style="vertical-align: 0.0px;" height="14" width="24" /> 2NH3(g), Kc = 9.0 at 350°C proceeds from right to left when 1.0 mol NH3, 5.0 mol N2, and 5.0 mol H2 are mixed in a 2.5 L reactor.
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