As the bright sun shines upon the water the water slowly disappears the same sunlight gives energy to the surrounding plants to convert water and carbon dioxide into sugar and only oxygen gas which change is a physical and which is chemical

if the concentration of products is decreased, the equilibrium will shift toward the products). add an inert gas (one that is not involved in the reaction) to the constant-volume reaction mixture: this will increase the total pressure of the system, but will have no effect on the equilibrium condition.

explanation:

air

in a tire you fill a tire with air

then a couple days later you check the air pressure in the tire

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