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Consider a violet and a red star, emitting light of wavelengths of 5.1x10^-7m and 6.3x10^-7m, respectively. Use Wien's displacement law to determine the surface temperature of these stars. Compare it to the temperature at the surface of the sun.
what color is the universal indicator when a double replacement reaction occurs with hcl and naoh. the hcl turns the
Neopentyl alcohol, (CH3)3CCH20H,cannot be dehydrated to an alkene without rearrangement. What is the chief product of dehydration? What product would you expect from addition of deuterium chloride to 2-cyclohexyl-4methyl-2-pentene?
50 mL of 0.15 M Tris hydrochloride, a weak acid with a pKa of 8.01, was titrated with 70 mL of 0.010 M sodium hydroxide. What was the resulting pH of the solution
Write both an equation using Lewis structures and a balanced chemical equation for the following reactions. Silicon atoms and chlorine molecules.
Suppose that you wished to prepare copper(II) carbonate by a precipitation reaction involving Cu2+ and CO3^2-. Select all of the pairs of reactants that could be used as solutes
Determine the enthalpy change when 23.5 g of carbon is reacted with oxygen according to the reaction C(s) + O2(g) CO2(g) delta H = -394 kJ/mol
A microwave oven has a power requirement of 1250 W. A frozen dinner requires 4.0 min to heat on full power.
Draw the structure of propanoic acid (propionic acid) with the approiate hydrogen bonded water molecules -- that is, put in the maximum number of water molecules that could H bond with propionic acid. Remember -- H bonds (hydrogen bonds) are indic..
Fusion of boric acid with sodium oxide forms a borate salt, Na2BO7. Without writing complete equations, find the mass (in grams) of B5H9 required to form 156g of the borate salt by this reaction sequence.
Upon combustion, a mole of hydrocarbon formed eight moles of CO2 and eight moles of H2O. Determine the molecular formula of the hydrocarbon and give the blanced combustion reaction.
the absolute temperature of the gas at which 3.33 10-3 mol occupies 257 mL at 722 torr K (c) the pressure, in atmospheres, if 0.0471 mol occupies 428 mL at 118°C atm (d) the quantity of gas, in moles, if 66.2 L at 50.°C has a pressure of 11.38 kPa..
Oxygen makes up 46.7 % by mass of the Earth's crust. How many grams of oxygen are present if a sample of the Earth's crust has a mass of 335 g
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