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Predict whether or not a precipitate will form upon mixing 75.0 mL of a NaOH solution with pOH=2.58 with 125.0 mL of a 0.018 M MgCl2 solution. Identify the precipitate, if any. Express as a chemical formula
what is the correct electron configuration for Cr (chromium). Chose the proper Lewis dot structure for the compound or poliatomic ion: Sulfur Dioxide (SO2).
Light travels extremely rapidly (c = 3.00×10^8 m/s ). Suppose you had to travel 20 miles to work every day. If you traveled at the speed of light for the entire trip, how long would it take you to get to work (in seconds)? [1 mile = 1.61km]
What is the [Ag+] in a solution at equilibrium when ammonia gas is bubbled through a solution that is 0.023M in AgNO3 until the concentration of ammonia is 0.20M. Assume that the addition of ammonia does not affect the volume.
What is the pH of a solution made by dissolving 46 g of acetic acid in enough water to make 700 mL of solution. Ka = 1.8 x 10^-5
A 1.00 L flask at 298 K contains a mixture of Kr and N2 with a total pressure of 0.940 atm. If the mole fraction of Kr is 0.455, what is the mass fraction of Kr
A 82.2 g sample of dinitrogen monoxide is confined in a 3.2 L vessel. What is the pressure (in atm) at 115°C?
Classify each reaction and give the name of all the chemical formula involved for each number
how many grams of oxygen gas are required to produce 7.68 kj of heat when hydrogen gas burns at constant pressure to
How much faster do ammonia (NH3) molecules effuse than carbon monoxide (CO) molecules? RATE OF NH3 effusion/rate of CO efusion
At a certain concentration of reactants the rate of appearance of water in the following reaction is 0.26 M/s.
at 900K the following reaction has kp=.345: 2SO2(g)+O2(g)-->2SO3(g) Partial pressures of SO2 is .150 and of O2 is .455. What is the equilibrium partial pressure of SO3?
Which compound in each of the following pairs should have a higher melting temperature? (a) NaCl or RbCl (b) BaO or MgO (c) NaCl or MgS
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