What is the change in ph after addition sodium hydroxide
What is the change in pH after addition of 10.0 mL of 1.0 sodium hydroxide to 90.0 mL of a 1.0 M NH3/1.0 M NH4+ buffer? [ Kb for ammonia is 1.8 x 10^-5]? 0.1 pH unit, 0.001 pH unit 0.01 pH unit 1.0 pH unit or zero
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Calculate the mass of urea that should be dissolved in 187 g of water at 35C to produce a solution with vapor pressure of 37.7 mmHg (At 35C, P(water)=42.2 mmHg)
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A series of combination having R=2Mohm and C=0.01 UF is connected across a D.C. voltage source of 50V. Determined capacitor voltage and charging current after 0.02s, 0.04s and 1 hour.
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An aqueous CaCl2 solution has a vapor pressure of 81.1 mmHg at 50 C. The vapor pressure of pure water at this temperature is 92.6 mmHg. What is the concentration of CaCl2 in mass percent?
An open belt drive connects two pulleys 1.2 and 0.5m diameter on parallel shafts 3.6m apart. The belt has a mass of 0.9kg/m length and maximum tension in it is not to exeed 2kn.
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