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The label on a bottle of concentrated HCl says the contents are 36% HCl by mass and have a density of 1.179 g/mL. What is the Molarity of the Conc. HCl. . The conc HCl was diluted 50 % with water, to 721 mL.which was then reacted with 35.4 g of Al. How many grams of hydrogen can be theoretically formed?. How much of which reactant will be left after the reaction is over?
I2+6H2O yields 2IO3-+12H+ where and how many electrons are needed to balance this equation
Explain how the calculated formula of the hydrate would be changed if water from the air is absorbed by the hot dry sample as it cools.
1-Complete the following reaction: Pb-210 decays by emission to form what new necleus? Write the complete nuclear equation.
mole of He atoms at 25.0 degrees celsius and 1.000 atm pressure? Compare this with the literature value of 126.04 J/molK.
Calculate the mass flow rate and power needed to run the compressor while assuming that oxygen can be treated as an ideal gas and that the gas at the entrance and at the exit is in local equilibrium.
a positive ion ESI mass spectrum of a protein showed a peak at m/z = 1001 resulting from the adition of 10 protons. what is the actual mass of the uncharged protein?
When no single electronic formula can be drawn for a stable molecule so as to maintain the octet rule and still fit the observed properties, the situation is best described in terms of
If a 200 mg piece of gold (density =19.32 g/cm^3) is hammered into a sheet measuring 2.3x1.0 ft, what is the average thickness of the sheet in meters?
Write out the un-ionized structure of valine & phnylalanine. Do either have enantiomers? Write the zwitterion structures of both.
Calculate the mass of water produced when 9.11 g of butane reacts with excess oxygen. Express the mass of water numerically in grams.
The temperature dependence of the equilibrium constant is given by the equation: Ln K = Ln A - delta H (standard enthalpy change)/RT. Solve for k (equilibrium constant).
What mass of concentrated sulfuric acid (98.0 % H2SO4 by mass) must be used to react completely with 164.9 g of Ca3(PO4)2
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