How many milliliters of manganese metal, with a density of 7.43 g/ml, would be needed to produce 21.7 grams of hydrogen gas in the single-replacement reaction below? show all steps of your calculation as well as the final answer. mn + h2o → mno + h2 (5 points)

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

plz give brainliest

idk what the question is about