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Choose the most reasonable substance that fits the description in each case:a) Element with higher first ionization energy: Ba or Bi b) Larger ion: Mg2+ or Sr2+ c) Shorter bond length: N2H2 or N2H4
traditional MALDI mass spectrometry, what are two factors that limit the spatial resolution that can be obtained in imaging mode?
You are a hazmat responder and walk into what appears to be a meth lab. There are flasks of iodine, White Gas fuel, Sodium Hydroxide, Nitric Acid, and a box of ephidrine.
describe the mechanism of the reaction for the production of tetrachloromethane
the heat of vaporization of a liquid is the energy required to vaporize 1.00 mol of a liquid at its boiling point. in
Write the net ionic equation for this reac- tion occuring in water: Calcium sulfide and iron(II) bromide are mixed to form iron(II) sulfide and calcium bromide.
which of the following compounds is a strong electrolyte?a. hclb. naclc. nh4cld. nac2h3o2e. all of
How many milliliters of 0.10 M HCl must be added to 44.7 mL of 0.40 M HCl to give a final solution that has a molarity of 0.25 M
What is the Freezing/Boiling point of 21.5g of NaCl in 139ml of water. Assume the vant hoff factor is 1.8.
A mixture of 7.50 g He and 29.5 g Ne has a pressure of 750. mm Hg. What is the partial pressure of each of the gases?
Calculate the microwave energy in Joule per photon and in Joule per mole of photon (J/mol). (b) How many moles of microwave photon must be absorbed by 1.0 g of water to raise its temperature by 1.0 ºC?
Use Lewis structures and bond energies to calculate the enthalpy change of the following reaction: HCN(g) + 2H2(g) => CH3NH2(g) a. 158 kJ b. -158 kJ c. -590 kJ d. 590 kJ e. none of these
a student placed 10.5 of glucose in a volumetric flask added enough water to dissolve the glucose by swirling then
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