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Question- The oxidation number of O is usually -2. Because magnesium oxide is a neutral compound, what must the oxidation number of Mg in this compound be?
Solve the above problem in detail no word count
A solution of volume 0.500L contains 1.68g NH3 and 4.00g (NH4)2SO4 . How many milliliters of 12M HCl must be added to 0.500 L of the original solution to change its pH to 9.00?
The density of gold is 19.3 g/cm3. A 3.4 mg piece of gold is hammered into a square trhat is 8.6 x 10-6 cm thick. what is the lenght of a side of the square, in cm
Problem- The ionization energy for lithium is 520 kJ/mol. The electron affinity for fluorine is -328 kJ/mol. Use these values and Hess's law to calculate the enthalpy for the following reaction per mole of reagent: Li(g)+F(g)?Li+(g)+F?(g), ?H=?
What volume of concentrated HCl (12 M) and what weight of solid tris-(hydroxymethyl)aminomethane (as the base) are required to make 100 mL of 0.250 M buffer, pH 8.0 (pK of Tris hydrochloride if 8.0)?
what is the annual cost of operation in a 70°F room if the door is opened 10 times a day with an average heat gain per opening of 200 kJ? How much would it cost to keep the inside at 35° F
Draw (2R,3S)-2-bromo-3-phenylpentane in the conformation from which it is most likely to undergo E2 elimination to give 3-phenyl-2-pentene.
Draw a phosphatidylglycerol that has caproic acid and cis-9 hexadecanoic acid. Draw and name the lipid which contains shingosine and stearic acid
A sample of sodium reacts completely with 0.355 of chlorine, forming 585 of sodium chloride. What mass of sodium reacted?
Describe the procedure for preparation of 250 cublic cm of aqueous sulphamic acid of accurately known concentration.
Give the systematic names for the formulas, or the formulas for the names. (The format copper(II) chloride for CuCl2, and using the format CO2 for CO2. Omit the centered dot for hydrates.)
Give the full electron configuration (# electrons, quantum numbers for last electron added, orbital diagram, electron configuration) for each of the following
The flask was filled to the calibration mark with water, and the contents were thoroughly mixed. What were the equilibrium concentrations of H+, Na+, H2PO-4 , and HPO-2 in the resultant solution? Ka1 = 7.1x10-3, Ka2 = 6.3x10-8, and Ka3 = 4.2x10-13..
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