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What is required to do work? Do all forces do work? Explain.
(a) What are the units of work?
(b) Show that, in terms of fundamental SI units, the units of work are kgm2 /s2
A buffer solution with a pH of 5.28 has a molar ratio of anion to acid of 3.40. Calculate the equilibrium dissociation constant (Ka).
T (K) K b 280 1.42E-05 285 1.46E-05
Calculate the difference in slope of the chemical potential against temperature on either side of (a) the normal freezing point of water and (b) the normal boiling point of water. (c) By how much does the chemical potential of water supercooled to..
A 1.6-m-long string fixed at both ends vibrates at resonant frequencies of 708 Hz and 1062 Hz, with no other resonant frequency between these values.
Write the VSEPR Aformula for the N atom as the central atom in glycine. What is the approximate C-N-H bond angle. Explain on the basis of VSEPR theory. What is the approximate O-C-O bond angle. Explain on the basis of VSEPR theory.
Consider the titration of 25.0 mL or 0.010 M Sn^2+ by 0.050 M TI^3+ in 1 M HCL, using pt and saturated calomel electrodes to find the endpoint.
Determine the molecular formula for the unknown if the molecular mass is 60.0 amu and the empirical formula is CH2O.
Question- Assuming its concentration in air is 2.0 ppb, calculate the molar solubility of SO2 in raindrops whose pH is fixed (by the presence of strong acids) to be 4.0, 5.0, and 6.0.
Write a net ionic equation for the reaction between aqueous solutions of perchloric acid and rubidium hydroxide.
The density of air at 19 °C is 0.0020 g/ml at about atmospheric pressure. Although air is a mixture, we can take the average molecular weight of the molecules in air to be 27.37 amu. (a) What is the mass of air in the bottle? (b) By how much does ..
An aqueous solution containing 0.18 M of unknown base has a measured pH equal to 8.27. What is the value of pKb for the unknown base?
A 20.0-mL sample of 0.800 M HBr solution is titrated with 0.800 M NaOH solution. Calculate the pH of the solution after the following volumes of base have been added.
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