Alkanes are linear, or branching, compounds that are made of varying numbers of carbon atoms that are all saturated with hydrogen atoms. The formula for an alkane is CnH(2n+2). This means that the number of hydrogen atoms equals twice the number of carbon atoms, plus two. Methane is the simplest hydrocarbon possible.
They use it to react carbon dioxide<span> with water to make a </span>sugar<span> called </span>glucose. Theglucose<span> is used in respiration, or </span>converted<span> into </span>starch<span> and stored. </span>Oxygen<span> is produced as a by-product. This process is called photosynthesis.</span>
B. the rate will decrease. plants need carbon dioxide
