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You take 125 mL of a stock solution that is 15.0 % solution of MgCl2(aq) and dilute it to a final volume of 500 mL. What is the new concentration of the MgCl2(aq)?
the reduction table in your notes, calculate the standard cell potential for the following reaction. F2(g) + 2 Cl-(aq) 2 F-(aq) + Cl2(g)
A gaseous mixture of O2 and Kr has a density of 1.104 g/L at 435 torr and 300K. What is the percent of O2 in the mixture?
a 0.90 g sample of liquid water was introduced into an evacuated2.00 l flask which was then sealed and heated to 37c.
A buffer solution contains 0.0237 mol sodium dihydrogen phosphate and 0.0165 mol of sodium hydrogen phosphate in a solution volume of 800. mL.
What are the maximum allowable concentrations of these pollutants in the environment considered to be and how are these concentrations expressed?
In a candy factory, nutty chocolate bars contain 22.0% by mass pecans. If 5.1kg of pecans were used for candy last Tuesday, how many pounds of nutty chocolate bars were made?
a 1.0 ounce piece of chocolate contains 15 of caffeine and a 6.0 ounce cup of regular coffee contains 105 of
a sample of mgcl2 is known to be contaminated with nacl. a 3.47-g portion of the sample is dissolved in water and
for a certain change, the value of change in U is -2.37kJ. during the change the system absorbs 650 joules. how much work did the system do?
In an equation for neutralization reaction that forms an aqueous solution of calcuim nitrate, the reactantsmight be
Given stock solutions of 0.02 M tris pH 7.4 and 4 M NaCl, how would you prepare 10.0 ml of a 0.5 M NaCl, 0.01 M tris pH 7.4 (how many ml of tris, how many ml of NaCl, how many ml of water)
Does the octet rule mean that a diatomic molecule has 16 valence electrons? Select from the following:
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