What is the estimated age of the ocean floor that is 425 km away from the Mid Ocean Ridge?

explanation:

i did this but i forgot how to do it

specific gravity is the density of a substance divided by the density of water. since (at standard temperature and pressure) water has a density of 1 gram/cm3, and since all of the units cancel, specific gravity is usually very close to the same value as density

so "c" is the answer

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the electrical  conductivity  of asolution  of an electrolyte is measured by determining the resistance of thesolution  between two flat or cylindrical electrodes separated by a fixed distance.

if you mean hydrogen and oxygen then water is the product