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Briefly describe two things that can be learned from examining emissions or absorption spectra of stars.
The Gibbs free energy of formation of solid iron (III) oxide is the Gibbs free energy change for the reaction
Acetylene gas (ethyne; HC=CH) burns in an oxyacetylene torch to produce carbon dioxide and water vapor, and the heat needed to weld metals. The heat of reaction for the combustion of acetylene is -1259 kJ/mol.
How does the Hammond postulate explain: a. the greater selectivity for bromination vs. chlorination of an alkane? b. the fact that the relative reactivity of C-H bonds of an alkane for free radical chain halogenation is 1º>2º>3º
Can you suggest some articles and books to understand well about production of Bio-plastics and design of plant?
During the initial stages of method development, the researcher was unable to separate anthracene and naphthalene with baseline resolution. From the options below, select all possible modifications the researcher could make to improve the resoluti..
Two gas reservoirs, A and B, have the same volume and contain gas at the same temperature. Reservoir A contains 7.62g of He gas at a pressure of 1.20atm. Reservoir B cotains Ne gas at a pressure of 1.80atm. Determine the mass of Ne gas in containe..
Iron has a BCC crystal structure, an atomic radius of 0.124 nm, and an atomic weight of 55.85 g/mol. Compute and compare its density with the actual value of 7.87
consider a sample containing 5 mol of a monatomic ideal gas taken from state a to state b. calculate changeE, changeH,q, and w.
At a certain temperature, the Kp for the decomposition of H2S is 0.726 H2S = H2+S initally only H2S is present at a pressure of 0.126 atm in a closed container. what is the total pressure in the container at equilibrium?
for a convalent compounds how is the structurebonding of a compound which is molecular different from one which has a
How long does it take (in minutes) for light to reach Mars from the Sun, a distance of 2.402 × 108 km
Match the element to the subshell containing unoccupied or partially occupied orbitals. Rubidium Vanadium Boron Uranium Tungsten Magnesium A. 5d B. 2p C. 5f D. 3s E. F. 4s G. 3d H. 4d I. 5s J. 2s K. 4p
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