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The mass of an electron is 9.11\times 10^{-31}~\rm kg. If the de Broglie wavelength for an electron in a hydrogen atom is 3.31\times 10^{-10}~\rm m, how fast is the electron moving relative to the speed of light? The speed of light is 3.00\times10^8 ~\rm m/s. Express your answer numerically as a percentage of the speed of light. 2.The mass of a golf ball is 45.9g . If it leaves the tee with a speed of 73.0m/s , what is its corresponding wavelength? Express your answer numerically in meters
Proteins rich in disulfide bonds often require longer incubation times at higher temperatures before they denature. Why?
How many liters of oxygen gas, at standard temperature and pressure, will react with 25.0 grams of magnesium metal? 2 Mg + O2 yields 2 MgO
Since you need pressure based constant use ideal gas equation (PV=nRT) to convert moles of gas into pressure with units of atmospheres. R=0.0821 L atm/mol K
How many moles of gas are contained in a human breath that occupies 0.45 L and has pressure of 747
Compute the enthalpy change, for this reaction per mole of solution and A calorimeter has water of 22.0 grams at the temperature of fifteen degree celsisu
Explain briefly how you could prepare the buffer solution in (a) if you had available the solid salt of the only one member of the conjugate pair and solution of a strong acid and a strong base.
2 g of a hydrocarbon fuel is burned in a colrimeter that contains 250 grams of water initially at 25 degrees celcius. After the combustion, the temperature is 26.55 degrees celcius.
Decaborane, B10H14, was used as a fuel for rockets in the 1950's . It ignites spontaneously with O2 according to the following reaction: B10H14 + 11O2 ? 5B2O3 + 7H2O
Oxalic acid dihydrate is often used as primary standard for the standardiztion of base solutions. For a procedure comparable to this experiment, approximately how many grams of oxalic acid dihydrate should be used in order to have a volume of abou..
How many moles of sodium bromide can be produced from the reaction of 1.03 moles of sodium with 0.650 moles of bromine gas? 2 Na(s) + Br2(g) > 2 NaBr(s)
Calculate the percent of a strontium sample left after 100 years. The half-life of strontium-90 is 28.1 years.
Vanadium(III) can reduce nitrate ion (NO3-) to nitrite ion (NO2-), producing VOCl3 also Write the BALANCED chemical equation for this reaction.
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