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Calculate the number of grams of Mg(OH)2 that should dissolve in 100 mL of water. Ksp = 5.6x10^-12
If the pressure exerted by ozone, {rm{O}}_3, in the stratosphere is 3.0 times 10^{ - 3} {rm{atm}} and the temperature is 251 K, how many ozone molecules are in a liter?
A student mixes 5.0 mL 2.00 x 10-3 M Fe(NO3)3 with 4.0 mL 2.00 x l0-3 M KSCN, and 1.0mL deionized water. She finds that in the equilibrium mixture the concentration of FeSCN2+ is 1.2 x l0-4 M.
what is the maximum kinetic energy of a photo electron ejected from cesium by 555nm light? note that if the wavelength of the light used to irradiate the cesium surface become longer than 600 nm, no photoelectrons are emitted.
what volume (in mL) of 1.12 M NaOH is required to react with exactly 12.3 grams of ferric chloride, according to the following equation? FeCl3(aq) + 3 NaOH(aq) → Fe(OH)3(s) + 3 NaCl(aq)
Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen: 4KNO3(s)→ 2K2O(s) + 2N2(g) + 5O2(g)
Natural lithium is 92.58% lithium-7, with atomic weight 7.016, and 7.42% lithium-6, with atomic weight 6.015. What is the observed atomic weight of lithium as it occurs in nature?
Calculate the mass of water produced when 9.11 g of butane reacts with excess oxygen. Express the mass of water numerically in grams.
What is the molarity of a solution made by mixing 213.6 ml of 1.5 M NaCl with 328 ml of 4.3 M NaCl.
Write the structure for the quinoxaline derivative obtained when benzil is the reactant. Do you think this compound would be coloured? If so, why?
A student measured the wavelength of hydrogen's visible red spectral line to be 647 nanometers. Which is a correct numerical setup for calculating the student's percent error.
Describe in detail the manufacture of silicon crystals. Describe the process
A 53.6 gram sample of an unknown substance contains 11.5 grams of carbon. What is the percent by mass of carbon in the compound?
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