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A polyatomic ion is composed of C, N, and an unknown element X. The skeletal Lewis structure for this polyatomic ion is [X?C?N]-. If the ion X4+ has the electron configuration [Xe] 4f145d106s2, what is the element X? Knowing the identity of X, write the completed Lewis structure for the polyatomic ion.
the rate constant for a certain reaction is 5.80times10-3 . if the initial reactant concentration was 0.350 what will
The mass percent of urea (formula CH4N2O) in a solution prepared by dissolving 16g of urea in 39g water is: a). 29% b). 0.29 % c). 16% d). 71%
How many Pb atoms would be present in a 0.500 L sample of this air (the approximate lung capacity of a human adult)?
potassium permanganate was used to determine the percentage of iron (Fe, At weight: 55.845? in an ore sample. the procedure included dissolving the iron wiht HCl and then converting all the iron in the ore to Fe2+ using several reagents.
You will start with 500 mg of one of isoamyl acloho to make isoamyl acetate. While the alcohols are liquids, we will measure them by mass directly on the balance, not by volume (i.e. the density of the alcohol will not be used; pretend the alcohol..
Determine what volume would it occupy at zero degree Celsius temperature at same pressure? Express your Answer in units of mL
Neglect activity and assume that neither Hg2+ nor SCN- react significantly with water (no formation of HgOH+ or HSCN). Hint: you will probably want to make an assumption in the charge balance to simplify the problem and then test to see if the ass..
a solution contains 29 g of sucrose c12h22o11 a nonelectrolyte dissolved in 929 g of water. what is the boiling-point
apply the variation function x2a-x2 for x between 0 and a to the particle in a box and estimate the ground state energy
Calculate the ratio of the masses of the buffer components HClO/KClO required to make a buffer with a pH of 7.1
complete the following chart of gas properties. For each positive observation, write a balanced chemical equation to describe the process.
Calculate the volume of 0.150 M KOH necessary to titrate 0.0246 mole of a monoprotic acid to a phenolphthalein end-point.
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