Achemist is hired by a major petroleum company to do research into developing a gasoline mixture that burns more efficiently in automobile engines. this is best described as research.

applied

Explanation:

According to my research on different research methodology, I can say that based on the information provided within the question this is best described as applied research. This type of research focuses on solving a specific and practical problem, in this situation that practical problem is finding a solution in order for gasoline to burn more efficiently.

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2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !

"hydrogen bonding is the attraction of h atoms in the water molecule (slight + charge) to o atoms in a neighboring water molecule (slight - charge); it is a weak interatomic force. but it is still strong enough to the water molecules "stick" together."