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Can some explain clearly how to determine the valence electrons of transitional metals and also their ions. for ex Mo, Mo2+, Ag, Pb. Pb2+. Confuse about what makes up their outer shell.
A gas mixture contains 2.50 mol of O2 and 3.00 mol of Ar. What is the molar specific heat at constant pressure for this mixture
A 10.0 mL solution of 0.300 M NH3 is titrated with a 0.100 M HCl solution. Calculate the pH after the addition of 20.0 mL of the HCl solution.
FE3+ SCN <-> FeSCN2, how will adding potassium thiocyanate (KSCN) initially change [Fe^3+], [SCN], and [FeSCN^2+). how should equilibrium system respond to the change
What is the rate of heat flow into a system whose internal energy is increasing at the rate of 45 W, given that the system is doing work at the rate of 165 W
Calculate the cost of electricity using a AA alkaline battery compared to the cost of electricity we use at home
Calculate the standard enthalpy of formation of liquid water (H2O) using the following thermochemical information
A 630-Hz sound travels through pure hydrogen. What is the speed of sound in hydrogen
Draw a chair conformer for propylcyclohexane, where the propyl group is in the equatorial position. On the same carbon (C1), show the attached H in the axial position.
During an action potential, Na+ ions move into the cell at a rate of about 3×10^?7mol/m2?s. How much power must be produced by the "active Na+ pumping" system
Calculate the mass fraction of sulfuric acid in the product solution. b.) Taking 100 kg of the 20% feed solution as a basis, draw and label a flowchart of this process, labeling both masses and volu
Suppose that 2.8 moles of an ideal diatomic gas has a temperature of 1003 K, and that each molecule has a mass 2.32 Ã* 10^-26 kg, What is the internal energy of the gas
Assume that you need to transfer 4689860 J of energy in ten minutes between the two reservoirs. What should the cross-sectional area of the steel rod
A car m = 2500 kg is traveling at a constant speed of v = 33 m/s. The car experiences a drag force (air resistance) of Fd = 250 N. What is the power in horsepower
Use the rydberg equation to calculate the wavelength in nm of the photon when an electron in a hydrogen atom undergoes a transition from n=6 to n=2
A small glass bead charged to 7.4nC is in the plane that bisects a thin, uniformly charged, 10-cm-long glass rod, What is the total charge on the rod
The solubility-product constant for Ce(IO3)3 is 3.2e-10. What is the concentration in a solution prepared by mixing 50 mL of O.0250 M Ce with 50 mL of a) 0.040 M IO3 b) 0.250 M IO3 c)0.150 M IO3
A student uses an audio oscillator of adjustable frequency to measure the depth of a water well. how many antinodes are in the standing wave
The work function for a metal is 3.8 eV. What is the minimum photon frequency that can just eject an electron from the metal
Calcium has a work function of 2.8 eV. If light of frequency 4.3 1015 Hz strikes the surface of calcium, what is the energy of the ejected electrons
Calculate the corresponding wavelenghts (in nm) and energies (in kJ/mol) of these vibrations.
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the mass of the star
explain why only a catalytic amount of the radical initiator is required in a free radical-chain polymerization reaction
An ice skater is traveling in a straight, horizontal line on the ice with a velocity of v=5.5m/s in the positive x direction. Write an expression for the normal force, F_n, that the ice pushes against
How much heat (in kJ) is evolved in converting 1.00 mole of steam at 145 C to ice at 0 C)? (The heat capacity of ice is 2.09 J/g C and the heat of vaporization of water is 32.9 kJ/mol)