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A 0.1500 g sample of pure ZnCl2xnH20 was placed on an ion-exchange column in the H+ form. The H+ released in the eluate required 16.98 mL of 0.1024 M NaOH to reach a phenolphtalein end point. Calculate the percent zinc in the sample.
Calculate the value of n for the data.
what is the valence molecular orbital configuration (according to MO theory) of homonucleic diatomic species where the atoms have an atomic number greater than seven?
Use the dipole moments of HF and HCL (following) together with the percent ionic character of each bond to estimate Lewis structure of each reactant and product. Identify the free radicals
Which of the following correctly shows intrachain hydrogen bonding in an alpha-helix. A. -NH HN- B. -C=O HC- C. -C=O HN- D. -C=O C- E. -CH HC-
Calculate the molar concentration of ferrocyanide in a solution of 0.031 M ZnSO4 saturated with Zn2Fe(CN)6. ZnSO4 will be completely dissociated into Zn2+ and SO42-
Check your gas chromatogrm for the presence of compounds other than isopentyl acetate. Explain the presence of any additional
Buffering capacity You want a solution that will buffer the addition of either 10 micromoles of acid or 10 micromoles of base. Total buffer concentration is equal to the concentration of the acid plus the concentration of salt of the acid
an automobile gasoline tank holds 47 kg of gasoline. when the gasoline burns 165 kg of oxygen are consumed and carbon
The total pressure of the mixture is. 650 mmHg. What are the partial pressure of each of the gases ? He, and Xe
Calculate the number of moles of electrons needed to produce 5.12g of copper from the electrolysis of a solution of CuSO4.
Calculate the pH of a buffer solution prepared by dissolving 0.200 moles of benzoic acid (C6H5COOH) and 0.450 moles of sodium benzoate (C6H5COONa in enough water to make 1.00 L of solution
what quanitity of energy does it take to convert 0.500kg ice at -20 Celsius to steam at 250 celsius? specific heat capacities: ice, 2.03J/g Celsius
Explain why the element bromine prefers to have its two atoms form covalent bonds rather than ionic bonds
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