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A fellow student tells you that she has both zero kinetic energy and zero potential energy. Is this possible? Explain. With which of our five senses can we detect energy?
Which of the following will have the lowest freezing point?
Each body function on the left is correctly matched with the corresponding function of the blood on the right except-
Nitrogen (N2) reacts with hydrogen to give ammonia (NH3): N2 + 3H2 -> 2NH3 If 30 g of N2 reacts with excess hydrogen, what the mass of ammonia formed would be?
Two 26.0 ml samples, one 0.100 M HCl and the other 0.100 M HF, were titrated with 0.200 M KOH. What is the volume of added base at the equivalence point for HCl. What is the volume of added base at the equivalence point for HF
Thermal energy
A reaction that is first order in A has a rate constant of 0.72/min If the initial concentration of A is 1.60 M, what is the concentration after one minute
The next generation "ultra supercritical" power plants may operate with steam pressures of up to 300 bar. However, material strength limitations prevent operation of high pressure equipment at temperatures above 600 C.
The rate constant of a reaction is 4.7 10-3 s-1 at 17°C and the activation energy is 33.6 kJ/mol. What is the value of k at 75°C.
How does the Mendeleev's periodic table help us to correct the atomic masses of some of the elements?
What is the expected freezing point of a 0.50 m solution of Li2SO4 in water? Kf for water is 1.86°C/m.
Consider the strontium atom and select the false statement below. The condensed electron configuration of the strontium atom is [Kr]5s2.
High-purity benzoic acid (C6H5COOH; ?Hcomb = -3227 kJ/mol) is a combustion standard for calibrating bomb calorimeters. A 1.169 g sample burns in a calorimeter (heat capacity of calorimeter alone = 1365 J/°C) that contains exactly 1.200 kg of water..
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