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Are the bonds in each of the subsequent substances ionic, non polar covalent, or polar covalent? Arrange the substances with polar covalent bonds in order of increasing bond polarity;(a) KCl (b)P4 (c)BF2(d)SO2(e)Br2(f)NO2
1 daniel weighing 201lb decides to climb a mountain weighing5010m. he took nutrition bars with him such that each 100-g
A buffer solution is prepared by mixing 20.0 mL of 0.032 M benzoic acid C6H5COOH(aq) solution with 25.0 mL of 0.022 M NaC6H5COO(aq). What is the pH of the buffer produced? (Ka of benzoic acid = 6.2x10^-5).
calculate the molar concentration of the final solution. assume volume remains constant
Radioactive element X decays to element Y with decay constant -0.3. Y decays to stable element Z with decay constant -0.2. Explain what is the system of differential equations for the amounts x(t), y(t), z(t) of the elements X, Y, Z respectively, ..
Write a balanced half-reaction describing the oxidation of gaseous dihydrogen to aqueous hydrogen cations.
What concentration of aqueous NaCl solution freezes at -15.2ºC? The freezing point of pure water is 0.0ºC and Kf of pure water is -1.86ºC/m.
Copper can be drawn into thin wires. How many meters of 34-gauge wire (diameter = 6.304 x 10^-3 in.) can be produced from the copper in 6.95 lb of covellite, an ore of copper is 66.0% copper by mass
how many grams of CaCl2 are needed to make 638.2 grams of a solution that is 28.5% (m/m) calcium chloride in water
A smple of mixture of NaCl, Caco3 and SiO2 weighed 7.30 grams. During the water wash the sample lost 2.21 grams. After treatment with HCL, the sample weighed 2.05 grams.
A mixture of 3 peptides (A) KFTS, (B) NELS, (C) GDSF were separated using an anion exchange column at pH 8. List the order of elution for the three peptides.
What are some of the side products that can occur in the preparation of meso-Tetraphenylporphyrin and Metalloporphyrin using pyrrole and benzaldehyde in acetic acid
A gold nucleus is located at the origin of coordiantes and an electron is brought to a position 2 angstrom from the origin. calculate the force between the gold nucleus and the electron
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