When encountering another vessel in darkness or reduced visibility, what do visible red and green lights indicate?

a) you are overtaking a sailboat

b)you are approaching a sailing vessel head-on

c) you are overtaking a powerboat

d) you are approaching the starboard side of a powerboat

Option (B)

Explanation: The green light and the red light plays a very important role in sailing on a vessel at night. The red light is present on the left and the green light is present on the right.

The red light refers to the port side of the boat whereas the green light refers to the starboard side of the boat.

Both this lights are used for communication between the sailors. It means that when there is the indication of this two lights, it depicts that there approaches a head-on sailing vessel and one should side past the other, giving a passage for another vessel to move without collision.

Thus, the correct answer is option (B).

a force of 500                  

answer: the value of enthalpy change will be -152.80 kj.

solution:

pressure = 1atm , temperature = = 298 k

given that pressure and temperature are same in both gases , the number of moles of both gases can be determined by the ideal gas equation.

according to reaction 3 moles no are reacting with 1 mol of ,then 0.49 mol of no will react with moles of ozone that is 0.16 moles of ozone. since, no is limiting reagent and is an excessive reagent.

enthalpy change for the reaction between the given volumes of the gases is :