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If it takes 3.48 x 10-19 J of energy to eject an electron from the surface of a certain metal, compute the longest possible wavelength, in nanometers, of light that can ionize the metal.
calculate the minimum number of grams of c3h8g that must be combusted to provide the energy necessary to convert 1.61
A helium balloon at a high altitude has 2.1 × 104 L of helium at 0.40 atm and -13°C. If the balloon descends to an altitude in which the atmospheric pressure is 1.00 atm and the temperature is 20°C.
An unknown metal sample is subjected to a beam of monochromatic light with a wavelength of 322 nm. Electrons are ejected from the metal surface with a velocity of 5.20 x 105 m/s. What is the threshold frequency of the metal?
Treatment of 2-ethyl-1-butene with H30+/H20 leads to three dimerization products of the formula C12H24. Draw the structures of all three.
preparenbspa 350- to 700-word paper in which you explain the importance of chemistry in your life and in society.nbsp
The best combination of reactants for preparing (CH3)2CHSH is a. (CH3)2CHBr + NaSH b. (CH3)2CHOH+CH3SH c. (CH3)2CHONa +CH2SH d. CH3CH2CH3 + NaSH
A metal cube of volume 1.55± .05 cm is found to weigh 21.0 ± .5 g. a) What is the density of the metal in kg/m3? (correct significant figures only) density = kg/m3 b) What is the relative uncertainty? ± (dimensionless)
An experiment requires 44.0 of ethylene glycol, a liquid whose density is 1.114 . Rather than weigh the sample on a balance, a chemist chooses to dispense the liquid using a graduated cylinder. What volume of the liquid should he use?
elemental metallic aluminum al is reactedwith hcl to yield aluminum chloride alcl3 and hydrogen gas h2. how many grams
Would the change in enthalpy of a neutralization rxn involving weak acid as well as strong base be greater or less that of a rxn between a strong acid and strong base. WHY
Explain what is the vapor pressure of seawater that has an osmotic pressure of 27.36 atm at T = 30 ° C. Define the pure vapor pressure of water at this
Substituents on an aromatic ring can have several effects on electrophilic aromatic substitution reactions. Substituents can activate or deactivate the ring to substitution,
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