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If you purchased 2.81 \mu Ci of sulfur-35, how many disintegrations per second does the sample undergo when it is brand new? Express your answer numerically in disintegrations per second.
(a). What is the trend in electronegativity going from left to right in a row of the periodic table? (b) How do electronegativity values generally vary going down a column in the periodic table?
the experiment utilized only metal-metal ion redox couples.nbsp is it possible to determine the srp for non-metals and
What concentration of CH3NH3Br is necessary to prepare a pH = 10.00 buffer solution assuming the base concentration is 0.69 M (Kb for CH3NH2 = 4.4 x 10-4). For this problem, include the correct units of M.
a large cylinder of He gas,such as that used to inflate balloons,has a volume of 25.0 L at 22c and 5.6 atm. How many moles of He are in such a cylinder
Dissolved in water to produce a 0.0170 M solution. The pH of the resulting solution is 2.33. Calculate the Ka for the acid.
For the setup in the above question, what is the value of Q, the reaction quotient, for this cell reaction at 25oC? 2Cr(s) + 3Br2(aq) --> 6Br-(aq) + 2Cr3+(aq)
Would expect the percent error in the solid density to be higher or lower than the percent error in liquid density. Explain why
Calculate [H+] and the pH of the following solutions.
Thermochemistry and Periodic Properties of Elements. State which atom is larger according to periodic trends. Explain the difference for each of the pairs.
1.00 mole of pure NOCl and .907 mole of pure Cl2 are placed in a 1.00-L container. Calculate the equilibrium concentration of Cl2(g).
In general, oxides of elements further to the left on the periodic table are basic, moving toward acidic on the right. For nonmetallic oxides, when the oxidation number of the element other than oxygen is high, the oxide tends to be acidic. When t..
if copper has a photoelectric threshold wavelength of 279 nm calculate the velocity ms of the electron emitted when
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