The percent by mass of nitrogen in NH4NO3 is closet to:
A) 15%
B) 20%
C) 35%
D) 60%

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Correct relationship between molecular formula and empirical formula

Oil rich countries in the middle east cover about 4% of earths total land area but prossess about 48% of the worlds known oil reserves what is the main reason for high concentration of reserves in this part of the world