Hydrocarbons contain only _____. carbon and hydrogen carbon, hydrogen, and oxygen carbon and nitrogen carbon and helium
2 answers:
<u>Answer:</u> The correct answer is hydrogen and carbon.
<u>Explanation:</u>
Hydrocarbons are defined as the compounds in which covalent bond is present between hydrogen and carbon atom. They are also called as organic compounds.
If any other atom other than hydrogen and carbon is present, it is not considered as hydrocarbon.
For Example: is an organic compound but
is not an organic compound.
Hence, the correct answer is hydrogen and carbon.
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Answer: The missing coefficient is 2.
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
As in the products, there are 2 atoms of sodium, thus there will be 2 atoms of of sodium in the reactant as well. This will balance the number of hydrogen and oxygen atoms as well.
Thus the missing coefficient is 2.