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a) given the following information for element X, identify the element group in the periodic table: the electron affinity is positive; the 1st ionization energy is less than the 2nd and 3rd ionization energies and is much less than the 4th ionization energy. Explain your reasoning.
b) would this element form a basic or an acidic oxide? Explain.
It is found that 4.68e-06 g of Nd2(CO3)3 dissolves per 100 mL of aqueous solution at 25 oC. Calculate the solubility-product constant for Nd2(CO3)3
What is the hydronium-ion concentration of a 5.23 10-4 M solution of p-bromobenzoic acid, BrC6H4COOH, for which Ka = 1.00 10-4
shown to contain 12.518 g silver, 0.6970 g carbon, and 2.786 g oxygen. What is the empirical formula of the sample?
In a pure sample of which of the following is there no hydrogen bonding? a. CH3NH2 b. (CH3)2NH c. (CH3)N d. none, pure samples of all these have hydrogen amines
given that carbonic acid h2co3 has a pka1 6.37 and a pka2 10.33 please answer a and b below.a. if you wanted to make
How much energy (in Joules) is required to heat 14.89 g of water from 11.9 oC to 49.2 oC ? Use 4.184 J/goC as the specific heat capacity of water.
The ka of acetic acid is 1.8 x 10^-5. Please show the calculations for the preparation of 100 mL of an acetic acid - sodium acetate pH 5.0 buffer using .10 M acetic acid.
what is the concentration m of ch3oh in a solution prepared by dissolving 16.8 g of ch3oh in sufficient water to give
Write down the securlar determinants for (a) linear H3, (b) cyclic H3, within the Huckel approximation. Estimate the binding energy in each case.
What is the molecular weigh of acetic acid that will form 2 moles of CO2 assuming complete combustion.
Which molecule has only 90° and 180° bond angles and one lone pair of electrons on the central atom. XeF4 SeF4 BCl3 ClF5
What is the osmotic pressure of a solution made from dissolving 50.0g of glucose rm C6H12 O6 in 250mL of water at 36.0 C
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