#1 How many moles of hydrogen (Hz) are needed to completely react with 5 moles of nitrogen (N 2)? *
N2 + 3H2 → 2NH3
O 7.5 molHz
O 1.67 molHz
O 15 molHz

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

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explanation:

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1. they vary with a higher number because boiling is way hotter than melting