Noble gas configuration of electrons
How many electrons must be gain or lost by each element to achieve a noble gas configuration of electrons. ( answer selection : Gain or lost)
1). Aluminum2). Phosphorous3). Flouride4). barium
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When 40.0g of ammonia and 50.0 g of oxygen are mixed and allowed to react, which is the limiting reagant? 4NH3 +5O2--> 4NO + 6H2O
Calculate the concentration of all species in a 0.100 M phosphoric acid solution. These species include [H3O+], [H2PO3-], [H3PO3], and [HPO32-]. For phosphoric acid, Ka1 = 3.0 x 10^-2 and Ka2 = 1.7 x 10^-7. (Only two of the hydrogens are ionizable
NO(g) + O2(g)-------- 2NO2 0.85 mol of NO is mixed 0.494 mol of O2 Calculate the number of moles of NO2 produced and Limiting reactant
A mixture of Ar and N2 gases has a density of 1.491 g/L at STP. What is the mole fraction of each gas
In the emission spectrum of helium, there are strong lines at wavelengths of 447.1 nm, 501.6 nm, and 587.6 nm. Using the Balmer-Rydberg equation, determine the values of nf for each emission.
Question: A 24.0 kg gold bar at 27.0°C is placed in a large, insulated 0.800 kg glass container at 15.0°C with 2.00 kg of water at 25.0°C. Calculate the final equilibrium temperature.
Air initially occupying 1 m3 at 150 kPa, 20°C undergoes an internally reversible compression during which PV^n = constant to a final state where the pressure is 600 kPa and the temperature is 120 C determine the value of n.
calculate the amount of heat in joules (q) required to affect this temperature change and the total change in internal energy, ?U. Note that some books use ?E as the symbol for internal energy instead of ?U.
Calculate the proton motive force across the inner mitochondrial membrane a 25 degrees C when theelectrical difference is -0.18 V (inside negative), pH outside us 6.7, and pH inside is 7.5.
Which of the following is always true for a spontaneous process at constant temperature. A) Delta S system + Delta S surroundings = q/T B) Delta S > 0 C) Delta S = q/T D) Delta system + Delta S surroundings > 0 E) Delta S < q/T
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