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Calculate the freezing point of a 0.08500 m aqueous solution of NaNO3. The molal freezing point depression constant of water 1.86 degrees C/m.
a 0.0425b -0.0790c 0.0790d -0.158e -0.316
how many grams of iron will react with water to form iron (III)oxide and 85 liters of hydrogen gas at 19 degrees celsius & 525 torr?
A solution has a volume of 2.0 L and contains 36.0 g of glucose. If the molar mass of glucose is 180g/mol, what is the molarity of the solution? Answer must be expressed in dimension analysis.
If an aqueous solution (solvent = water) is 0.5 molal in NaClO, what is the mole fraction of NaClO that is present? Hint: assume you have 1.00 kg of total solvent in your sample.
As a technician in a large pharmaceutical research firm, you need to produce 400 mL of 1.00 M potassium phosphate buffer solution of pH = 7.29. The pKa of H_2PO_4^- is 7.21.
a 70g piece of ice at 0c is added to a sample of water at 6c, all of the ice melts and the temp of the water decreases to 0c, how many grams of water were in the sample?
Calculate the densities of of each of the following gases in g/L at ATP: a) C3H8; b) NH3; c) Cl2; d) Ar.
The silicon in the plate is a mixture of naturally occurring isotopes. One of the those isotopes is silicon-30, which has an atomic mass of 29.97376 amu and a percent natural abundance of 3.10%.
Based on understanding of enthalpy, what is the sign of dH for the binding of Cu2+ to soil. Explain.
a sample of a binary compound of boron and chlorine weighing 2.842 g occupies .153 L. this sample is decomposed to give 0.664 g solid boron and enough gaseous chlorine to occupy .688 L at the same temperature and pressure. determine the molecular ..
Determine value for the rate of formation of HCl during the same interval of 3 seconds If the rate of disappearance H2 = -0.13 M/s at this specific time?
The individual standard electrode potentials do not indicate anything about tendency to gain electrons. The cell potential of the entire cell does.
A titration is performed in which 50.0 mL of 0.0463 M acetic acid (Ka = 1.8 x10^- 5) is titrated with 0.1000 M NaOH. Calculate the pH at the beginning of the titration (Vb = 0).
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