Answer:
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The statement that is not true of greenhouse gases is :
They are produced solely by human activities
Human activities such as: using hairspray, creating pollution, etc are worsened the condition of the greenhouse effect, it exists even before we did those things.
Explanation:
Emissions of gases by humans began to rise dramatically because of the economic Revolution and changes in land use. Several greenhouse gas emitting activities area unit currently essential to the worldwide economy and a elementary a part of trendy life.
Carbon dioxide from the burning of fossil fuels is that the largest single supply of gas emissions from human activities.
Though humans are the main cause of greenhouse effect.
During intense exertion or activity involving the muscles, there arises a need for a sudden short term burst of energy. This need for energy is so demanding that it cannot be satisfied through the normal mechanism whereby energy is supplied through aerobic respiration using oxygen.
Therefore the muscle cells must rely on other mechanisms that do not rely on oxygen to fuel muscle contraction and this is where they resort to anaerobic respiration which uses pyruvate to play the role of oxygen as the final electron acceptor. In the process, pyruvate accepts an electron and is reduced to lactic acid in the muscle tissues.
The right answer is 2HgO → 2Hg + O2
Balancing a balance equation consists of finding the right stoichiometric coefficients. These coefficients (placed in front of each molecule) balance the number of each of the different atoms involved during a chemical reaction.
In this reaction, we find on both sides the same number of atoms: two oxygen atoms and two atoms of mercury.