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What is the principal quantum number of the valence electrons in an atom lead? EXPLAIN how you got your answer.
a .242 g sample of naphthalene is burned in a bomb calorimeter containing 1025 g of water. the heat of combustion of
Consider the non-aqueous cell reaction 2Na(l) + FeCl2(s) 2NaCl(s) + Fe(s) for which E°cell = 2.35 V at 200°C. ?G° at this temperature is: a. 453 kJ. b. -453 kJ. c. 907 kJ. d. -907 kJ. e. None of these choices is correct.
a sample containing 3.20 neon gas has a volume of 9.00 . assume that the pressure and the temperature remain constant.
The major industrial method for the preparation of elemental phosphorus is heating a mixture of phosphate rock, carbon, and sand in an electric furnace. The chemical reactions can be represented by
If 40.0 g acetylene is allowed to react with 40.0 g oxygen, how many grams CO2 are formed.
How many grams of MgCl2 are needed to make a 3.35% w/v solution having a total volume of 500.0 mL
What is the IUPAC name of propyl butly ketone. a. the root name is based on the longest chain which contains the carbonyl carbon b. the oxygen atom is never bonded to the C-1 c. both (a) and (b) d. neither (a) nor (b)
Some potassium dichromate (K2Cr2O7), 2.335 g is dissolved in enough water to make exactly 500 mL of solution. What is the molar concentration of the potassium dichromate. What are the molar concentration of the K+ and Cr2O7- ions
Alpha helices are a type of secondary structure in proteins. What is the length of a 25-kDa single-stranded -helical protein segment. Assume a mean residue mass of 110 Da.
Calculate the force of attraction between a cation with a valence of +2 and an anion with a valence of -2, the centers
how long would it take to count 1 billion tiny invisible objects from a bottle of these objects if you couldnt even see
A metal, M, was converted to the chloride, MCl2. Then a solution of the chloride was treated with silver nitrate to give silver chloride crystals
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