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The energy involved when an electron is added to a gaseous atom of an element is called: a)ionization energy b)lattice energy c)electronegativity d)electron affinity?
From 15 mL H2O2 solution 22.0 mL gas evolved at 28.0 degrees Celcius and 740 Hgmm pressure. Calculate the concentration of the original H2O2 solution in mol/dm^3 unit.
How is it possible that hard water can also be very saline ie The River Murray in South Australia? If sodium is added to soften hard water, then wouldn't the presence of salt in hard water 'soften' the water naturally
100ml of a 0.4 mol/L acetic acid is mixed with 20ml of a 1.8 mol/L NaOH. Calculate the pH of this buffer (pka acetic acid = 4.76). What is the pH of 100mL of a solution made using 5 mL of 1 M Na2HPO4 and 5mL of NaH2PO4
which catalysts are used for the polymerization of tetraflouroethene to form teflon? and for the polymerization of
What mass of HClO4 should be present in 0.600 L of solution to obtain a solution with each of the following pH values pH = 2.70? pH = 1.70? pH = 0.60
Caculate the kinetic energy of a mole of oxygen atoms, all moving at a speed of 400 m/s (10000 mph).
the normal boiling point for acetone is 56.5degc. at an elevation of 5300 ft the atmospheric pressure is 630. torr.what
Helium atoms do not combine to form He2 molecules, yet He atoms do attract one another weakly through
Steam at 100C is used to heat water. What is the minimum mass of steam required to melt 100g of ice at 0C and heat the resulting liquid to 100C?
For the blanced equation, shown below, What would be the limiting reagent if 67.6 grams of H2S were reacted with 55.9 grams of O2. 2 H2S (g) + 3 O2 (g) --> 2 SO2 (g) + 2 H2O (g)
Calculate the mass of CuS produced and the concentration of H+ ion produced by bubbling H2S into 1.00 L of 0.10 M CuCl2 (aq) solution. The net ionic equation is:
Using 3.2 g bromobenzene. Calculate the number of grams of Mg required if you need a molar equivalency of 1.25. Then calculate the amount of benzaldehyde (106.12 g/mol), benzophenone (182.22 g/mol), and methyl benzoate (136.15 g/mol) needed (they ..
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