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I need a picture of a pen-is

Which formula can be used to calculate the molar mass of ammonia (nh3)? molar mass of n + molar mass of h 3 × molar mass of n + molar mass of h molar mass of n + 3 × molar mass of h 3 × molar mass of n + 3 × molar mass of h

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

Why doesn't heat added to water make the tempature rise above 100c