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Chemical tests of four metals A, B, C, D show the following results a) only b and c reacts with 0.5 m HCL to give h2 gas b) when b is added to a solution containing the ions of the other metals metallic A, C,.B. and d are formed c)a reacts with 6 m hno3 but d does not select wihch represents the metals arranged in decreasing order as reducing agents
The minimum energy required to cause the photo electric effect in potassium metal is 3.69*10^-19 J. will photoelectrons be produced when light shines on the surface of potassium?if 400 nm radiation is shone on potassium,what is the velocity of the..
what is the wavelength in meters of a proton traveling at 2.70X10^8 m/s? (assume the mass of the proton to be 1.673X10^-27 kg)
If sealed glass bottle containing an organic solvent is dropped and breaks, pieces of glass may be propelled outwards because of build-up pressure that forms in the bottle. explain which is more dangerous a liquid pentane or liquid decane
Choose one of the following atmospheric issues: air pollution, global warming, ozone depletion, and acid deposition. Then, respond to the following,
Explain how micelles and more complex solutions work. Consider all Solute-Solute, Solvent-Solute and Solvent-Solvent interactions in such a system.
Draw a molecular orbital energy level diagram and determine the bond order for each of the following
Determine the volume measured in a buret of a 0.2750M solution of HCl needed to consume all the calcium carbonate in a 2.5 x 1.0 x 0.5 in block. Density of CaCO3 es 2.71g/cm3.
A student sets up two reactions. Reaction 1 uses 0.290 of reactant, and Reaction 2 uses 0.580 of reactant. How many times faster is Reaction 2 compared to Reaction 1. Express your answer as a multiple of the rate for Reaction 1 to three significan..
the sample has a mass of .211 grams,a volume of .25 and a temperature of 275K at a pressure of .945 atmospheres. What is the most likely element forming the sample?
NH3 is a weak base (Kb = 1.8 × 10-5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.041 M in NH4Cl
One way to do this is to mix oxygen with helium. Assume a mixture of 10.% oxygen and 90.% helium. Assuming Henry's law behavior, calculate the levels of oxygen and helium in the blood of a diver at 100 m. Assume T = 298 K.
Diethylamine, (C2H5)2NH, is a weak base (pKb=3.16 at 25oC). What is the pH of 0.155 mol/L (C2H5)2NH(aq) at 25oC? Give your answer accurate to two decimal places.
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