Given a chemical reaction, methane (ch4) burns in oxygen (o2) to produce carbon dioxide (co2) and water (h2o). which of these represent an unbalanced equation with the correct chemical formulas? . a.. ch4 + o2 co2 + h2o. b. ch4+ co2 o2 + h2o. c. co2+ h2o ch4+ o2. d. ch4 o2 + co2+ h2o

Answer : The correct option is A.

Explanation :

As per the question, in a reaction, two reactants (methane and oxygen) should be present on the left side of the right-arrow and two products (carbon dioxide and water) which are formed in the reaction should be present on right side of the right-arrow.

Therefore, the unbalanced chemical reaction will be,

explanation:

metals have excess of electrons whereas non-metals have deficiency of electrons. thus, in order to gain stability metals easily donate their electrons to the non-metals.

for example, electronic configuration of sodium is and electronic configuration of phosphorous is .

when a phosphorous atom and sodium atom combine together then sodium will donate is extra one electron to the phosphorous atom. as a result there will be formation of ionic bond between sodium and phosphorous.

the reaction will be as follows.

there, are three sodium sodium atoms and each of them will donate its one extra electron to phosphorous atom. thus, the sub-shell of phosphorous gets completely filled.  

thus, we can conclude that electrons are transferred from atoms of sodium to atoms of phosphorous. this transfer makes the sodium atoms donate one electron and the phosphorous atoms to gain one electron. as a result, the sodium and phosphorus atoms strongly attract each other.

answer by yourhope:

how do models compare to real-world objects?

d. most models represent a real-world object in a simpler way.

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