What mass of oxygen gas measured at stp is required in
What mass of oxygen gas, measured at STP, is required in order to release 8300 kJ of heat to the surroundings from the combustion reaction shown? CH4+2O2 -> CO2 + 2H2O DH=-890.3Kj
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A certain weak base has a Kb of 7.80 × 10-7. What concentration of this base will produce a pH of 10.16
For the diprotic weak acid H2A, Ka1 = 3.2 × 10-5 and Ka2 = 7.9 × 10-7. What is the pH of a 0.0400 M solution of H2A? What are the equilibrium concentrations of H2A and A2- in this solution
A small mailbag is released from a helicopter that is descending steadily at 1.00 m/s. After 3.00 s, What is the speed of the mailbag
What mass of oxygen gas, measured at STP, is required in order to release 8300 kJ of heat to the surroundings from the combustion reaction shown
How long (in years) would it take the oceans to heat up to 100°C? You can assume that they start out at about 2°C. Take the heat capacity of seawater to be the same as pure water.
The motion of a particle is given by x = A sin^3(?t). What is the amplitude of the particle's motion
NH3 is a weak base (Kb = 1.8 × 10-5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.049 M in NH4Cl
Calculate the circumfrential and longitudinal stresses in the plates when the internal pressure is 800KN/m sq. If the ultimate tensile stress of the material used is 600 MN/m sq, and the efficiency of the longitudinal joint is 70 per cent, determi
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