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In an electron microscope, electrons are accelerated by passing them through a voltage difference. The kinetic energy thus acquired by the electrons is equal to the voltage times the charge on the electron. Thus, a voltage difference of 1 volt imparts kinetic energy of 1.602 × 10-19 volt-coulomb or 1.602 × 10-19 J.
Calculate the wavelength associated with electrons accelerated by 6.00 × 103 volts. λ = ___× 10^? pm
Question- Which of the following is NOT a factor in determining the biological effects of radiation exposure. The ionizing ability of the radiation
Copper(II) iodate precipitates from iodate solution. The formula of the precipitate is CU(IO3)2. A saturated solution of this substance was made in 0.01 M KIO3.
How much energy (heat) is released when 1.52 moles of H2 reacts with 0.68 moles of Cl2 to create HCl(g) if the ΔHrxn = -184.6 kJ.
The Na -glucose symport system of intestinal epithelial cells couples the \"downhill\" transport of two Na ions into the cell to the \"uphill\" transport of glucose, pumping glucose into the cell against its concentration gradient
Unknown acid (0.4g)+(50ml water) was titrated with NaOH to reach the equivalence point. Result : addition of 15ml NaOH was needed to reach the equivalence point
The vapor pressure of methanol at 30. oC is 158 torr. What mass (in grams) of methanol actually evaporates?
Aluminum reacts with chlorine gas to form aluminum chloride via the following reaction: You are given 30.0 of aluminum and 35.0 of chlorine gas. Part A If you had excess chlorine, how many moles of of aluminum chloride could be produced from 30.0 ..
When calcium carbonate reacts with hydrochloric acid, calcium ions are transferred to the solution. Write the net ionic equation for this reaction.
It required 16ml of a sodium hydroxide solution titrated against a standard solution of 0.79g of potassium hydrogen phthalate in water to reach equivalence point. What is the molarity of the sodium hydroxide?
Problem- Carry out the following calculation, making sure that your answer has the correct number of significant figures
200 ml sample of lake water is contaminated with a single monoprotic acid. titrating this sample with a .005 m naoh
A) What is the PH of a buffer prepared by adding 0.708 mol of weak acid HA to 0.507 mol of NaA in 2.00 L of solution? The dissociation constant Ka of HA is 5.66*10^-7? B) What is the PH after 0.150 mol of HCl is added to the buffer in part A? Assum..
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