Which best describes global CO2 emissions? A. Humans have reduced the amount of CO2 in the atmosphere. B. The amount of CO2 released by humans has increased over the last 200 years. C. There are no fuels that release CO2 when burned. D. Humans have stopped releasing CO2 into the atmosphere.

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The answer for this is a

Answerit curves up and levels out.explanationwe assume that the container contains absolutely no ammonia to begin with as it states that "nitrogen gas and hydrogen gas" react to "produce ammonia."at dynamic equilibrium, the product and reactant concentrations are equal.this means that, starting from a concentration of zero, [nh₃] must curve "up" from zero and then level out to a constant concentration.