Questions asked by Susanns

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• When a container is filled with 3.00 moles of #H_2#, 2.00 moles of #O_2#, and 1.00 mole of #N_2#, the pressure in thecontainer is 768 kPa. What is the partial pressure of #O_2#?
  
• Vector A has a magnitude of 8.00 units and makes an angle of 45.0° with the positive x-axis. Vector B also has a magnitude of 8.00 units and is directed along the negative x-axis. Find (a) the vector sum A + B and (b) the vector sum of A-B?
  
• The record distance in the sport of throwing cowpats is 81.1m. Assuming the initial launch angle was 45 degrees, and neglecting air resistance, determine (a) the initial speed of the projectile and (b) the total time the projectile was in flight? Thanks.
  
• The enthalpy change for the reaction between 2 molecules of carbon oxysulfide (COS) to form 1 molecule of CO2 and 1 molecule of CS2 is –3.2 × 10–24 kJ per molecule of COS. What is the enthalpy change for 1 mole of COS?