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Given the following reaction, if 32.5 g of Cl2 reacts completely with excess P, how many g of PCl3 will be produced? 2 P + 3 Cl2 --> 2 PCl3
What is the percentage of copper (by mass) in copper(II) nitrate trihydrate. Cu(NO3)2 : 3H20
how many N2 molecules can be produced after the explosion of 2.37 kg of NH4NO3? (Molar mass of NH4NO3 is 80.06 g/mol.)
what is the vapor pressure of ethanol at 20 celcius is 44mm, and the vapor pressure of methanol at the same temperature is 94 mm. Assuming an idea solution, what is the vapor pressure of a solution made from 30.0g of methanol and 45 g of ethanol
Describe how a linear sequence of amino acids gives rise to the three-dimensional structure of proteins.
A gasous mixture of O2 and Kr has a density of 1.104 grams per liter at 435 torr and 300 K. What's the mole percent of O2 in the mixture?
What is the volume in mL of 0.585 M HCl(aq) needed to reach halfway to the equivalence (stoichiometric) point in the titration
Choose the selection which correctly characterizes all three of the following substances in terms of whether they are polar or nonpolar: IF and NCl3 and SiF4
How many mL of each of 0.10 M lactic acid solution and 0.10 M NaOH solution are needed to make 800 mL of a buffer of pH 3.50?
The molar enthapy of fusion for water is 6.008 kJ/mol. calculate the molar enthapy of vaporization of a substance if 0.652 mol of the substance absorbes 6.411 kJ when it melts.
solution of water (Kf = 1.86^ C/m) and glucose freezes at - 2.55^ C. What is the molal concentration of glucose in this solution? Assume that the freezing point of pure water is 0.00 ^ C.
a student produces 2.73 g of a compound. She calculates the theoretical yield as 3.40 g. What is the percent yield
Determine how much heat is evolved or absorbed when 25.0 of lithium iodide completely dissolves in water. Lithium iodide has a lattice energy of -7.3 X 10^2 kJ/mol and a heat of hydration of -793 kJ/mol.
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