The answer is C because its shiny
Answer:
Residence time = 5000 years
Explanation:
Given that ;
the mass of oxygen in the atmosphere = 1.4 million gigatons = 1.4 × 10⁶ gigatons
Major sources of oxygen to atmosphere include:
Photosynthesis by plants on land = 125 gigatons/yr
Photosynthesis by plants in ocean = 155 gigatons/yr
Total rate of oxygen = (125 + 155) gigatons/yr
= 280 gigatons/yr
the residence time of oxygen in the atmosphere is therefore calculated by the formula:
Residence time =
Residence time =
Residence time = 5000 years
An endothermic reaction is the one that use : Chemical energy
Chemical energy refer to the energy that is stored within the bound of the compound (endothermic reaction absorb heat to produce energy)
hope this helps