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Calculate the % by mass and the molarity of a MgCl (lower subscript 2) solution made by dissolving 10.8 g MgCl (lower subscript 2) in 10.0 mL of water (density H20 and solution 1.00 g/mL). Calculate the molarity of chloride ion in the solution.
An 18.0 g sample of magnesium is completely burned in the presence of air to form magnesium oxide. What is the mass of magnesium oxide obtained
How many phases and components are present. (b) What is the variance (the number of degrees of freedom) of the system? Identify the independent variables.
The molar solubility of MnCO3 is 4.2 x 10-6 M. What is Ksp for this compound?
If this NH4Cl solution is assumed to be ideal and is completely dissociated into ions, calculate the vapor pressure of this solution at 29.0 °C. (The vapor pressure of pure water at 29 °C is 30.0 mm Hg.)
Consider one mole of a monatomic ideal gas at 300 K that undergoes a free expansion from a volume of 1 m^3 to 10 m^3. a) How much does the chemical potential of each molecule in a gas change?
The air in an inflated balloon (defined as the system) warms over a toaster and absorbs 121 J of heat. As it expands, it does 70. kJ of work. What is the change in internal energy for the system.
A student places 2.0 moles of methylamine in 500ml of water. what is the pH? the Kb of methylamine is 4.4x10^-4.
the alcohol attacking the 2-phenylacetic acid with the subsequent loss of a proton. b. protonation of the ethanol by H2SO4. c. protonation of the carbonyl oxygen of the 2-phenylacetic acid. d. protonation of the hydroxyl group of the 2-phenylac..
What is the boiling point of acetone at an elevation where the external pressure is 323 torr?
What is its volume is 2.58 cubic micrometers. a)What is its volume in cubic millimeters (mm^3)?
A solution of NH4Cl is prepared and its molarity is 1.00 x 10-3; what is the pH of this solution.
If a 10B nucleus absorbs a proton, the radioactive nuclide that is produced may undergo alpha decay. What nuclide is produced in the decay process?
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