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The element mercury, chemical symbol Hg, has an atomic number of 80. How many protons, electrons and neutrons does an atom of Mercury contain?
When NH4NO3 dissolves in H2O, would you predict that the energy needed to break the ionic bonds and separate the water molecules (H1 and H2) to be greater or less in absolute value than the energy released (H3) when the water-ion interactions o..
Compare the energy of a photon of wavelength 3.4 um with that of wavelength 0.155 nm. answer is in E1/E2
which of the following are oxidation reduction reactions? a)Ca(s)+F2(g)>CaF2(s) b)Fe(s)+2HCl(aq)>FeCl2(aq)+H2(g) c)2NaCl(aq)+Pb(NO3)2(aq)>PbCl2(s)+2NaNO3(aq) d)2CuCl(aq)>Cu(s)+CuCl2(aq)
Draw a doagram to show the changes in potential energy that occur from the rotation around the C1-C2 bond of 1-bromopropane.
Explain which of the following aqueous solutions has the strongest ion-dipole attractions: 0.3 M Na3PO4, 0.1 M NiF2, 0.2 M Rb2CO3, 0.01 M Sr(OH)2, , 0.03 M ScBr3.
A 1.0 dm^3 glass bulb contains 1.0x10^23 H2 molecules. If the pressure exerted by the gas is 100 kPa, what is (a) the temperature of the gas, (b) the root-mean-square speeds of the molecules, (c) Would the temperature be different if they were O2 ..
A solution contains 1.35 g of Ca(OH)2 in 875 mL of solution. Find the normality of the solution.
the water solubility of L-alanine is 127g/L at 25 degrees celsius, what is the water solubility of D-alanine at 25 degrees celsius?
Consider the reaction of aluminum chloride (AlCl3) with sulfuric acid (H2SO4):2AlCl3(aq) + 3H2SO4(aq) ? Al2(SO4)3(aq) + 6HCl(aq) (a) 2.67 g of aluminum chloride is reacted with 1.96 g of sulfuric acid. Calculate the moles of aluminum chloride and s..
the mass ratio of sodium to fluorine in sodium fluoride is 1.211. a sample of sodium fluoride produced 36.5 rm g of
A gas occupying a volume of 248 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume.
Calculate the sodium ion concentration when 80.0 mL of 3.2 M sodium carbonate is added to 25.0 mL of 2.3 M sodium bicarbonate. Calculate the sodium ion concentration in M
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