Momentum is defined as the product of mass and velocity for an object. For oxygen molecules, momentum is the product of the mass of the molecule and its velocity.
In a gas, the momentum of oxygen molecules can be calculated using the ideal gas law, which takes into account the mass, velocity, and number of molecules present in the gas.
The momentum of oxygen molecules is directly related to gas pressure. As the momentum of the molecules increases, so does the pressure of the gas.
Yes, the momentum of oxygen molecules can change if there is a change in their mass or velocity. For example, if the temperature of a gas increases, the velocity of the molecules will increase, resulting in a change in momentum.
During a chemical reaction, the momentum of oxygen molecules may change due to changes in mass or velocity as bonds are formed or broken. However, the total momentum of all the molecules involved in the reaction will remain constant, following the law of conservation of momentum.