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Air-saturated water has a hydronium ion concentration caused by the dissolved CO2 of 2.0 × 10–6 M, about 20-times larger than that of pure water. Calculate the pH of the solution at 25 °C.
Coal is mostly carbon (C). When it is burned, it reacts with oxygen in the air in a combustion reaction. 43% of the electricity generated uses coal. On average, each person uses 2680 kg of coal per year to generate electricity that they use.
How much CO2 is produced?
Calculate the value of the mass-transfer coefficient for mass transfer from a sphere of naphthalene to air at 45 oC and 1 atm abs flowing at a velocity of 0.305 m/s. The diameter of the sphere is 25.4 mm. The diffusivity of naphthalene in air at 45 oC is 6.92 x 10-6 m2/s and the vapor pressure of solid naphthalene is 0.555 mm Hg. Viscosity of air is 1.93 x 10-5 Pa.s, density of air is 1.113 kg/m3.
define Solution
What is the equation to calculate concentration/molarity?
How many moles of NaCl will be in a 2.1 liter solution with a molarity of 0.1M?
Phosphoric acid is a weak acid. If there are 1.32 × 10-2 mole of phosphoric acid present in 875 mL of solution
(i) Write the ionization reaction
(ii) Calculate the concentration of hydrogen ions, [H+], in solution
(a) Calculate [OH-] in a solution containing 100.0 g of potassium hydroxide in 2.50 L solution.
Give the balanced ionization reactions for the following weak acids and bases and write the Ka or Kb
expressions for each:
(a) ascorbic acid
(b) boric acid
(c) methyl amine
Activity # 1
1. You found a piece of copper metal weighing 3.10 g
imbedded in an ice block. How much heat is absorbed by
the piece of metal as it warms in your hand from the
temperature of the ice block at 1.5 oC to your body
temperature of 37.0 oC? The specific heat of copper is
0.385 J/g- oC. Assume that the metal is pure coppe
