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Sulfur has two solid forms - a (or rhombic) and b (or monoclinic). The standard enthalpies of combustion, in which the product is SO2, are -296.53 kJ/mol for S(s,a) and -296.86 kJ/mol for S(s,b). Find the standard reaction enthalpy for the process S(s,a) -> S(s,b).
draw Lewis Structures for the following FIVE elements.
Explain the following given for each statement in determining the sequence of peptide with concise (short) but complete response. you must state the specificity of each statement implication in determining the sequence of octapeptide.
The decomposition of nitric oxide NO to N2 and O2 is second order with a rate constant of 0.0796 M^-1 S^-1 at 737 C and 0.0815 M^-1 S^-1 at 947 C. Calculate the activation energy.
A student carried out several different determinations of the density of the metal ruthenium. The students results were as follows
HCl + NaOH = NaCl + H2O If 200 mL of a .20 M HCl solution is consumed in the above reaction, how many grams of each product would be produced.
What molecule does most probable speed of 393m/s at 25*C? Also calculate the mean speed
What is mass (in g) of copper can be recovered from 49.9 mL of a 0.628 M solution of copper(I) chloride and excess hydrogen
What is the ppm concentration? The molar extinction coefficienet is 87,000 M-1cm-1 and the molecular weight is 407.98 g/mol. The density of water is 1.00 g/mL
What is the total pressure in a 11.0 L flask 20.0°C, which contains 0.127 moles of H2 and 0.288 moles of N2
A certain element consists of two stable isotopes. The first has atomic mass of 7.02 amu and a percent natural abundance of 92.6%.
Hemoglobin has a mass of about 67,000 g/mol. It is 0.3335% iron by mass. How many iron atoms are in a molecule of hemoglobin?
Draw the skeletal structure of the major organic product formed when benzaldehyde reacts with Cl2 in the presence of AlCl3. Assign atomic charges where appropriate.
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