How many resonance structures does NH3 have?

I believe that there are none, but I would like some confirmation ...

Most metamorphic rock are formed when?

Which of the following statements about monosaccharide structure is true? A) Aldoses and ketoses differ in the position of their hydroxyl groups. B) Monosaccharides can be classified according to the spatial arrangement of their atoms.

Which takes more energy, removing an electron from an atom where the nucleus has a tight hold on its electrons, or a weak hold on its electron? Explain.

A way measurable or visible way of describing something

What is the value of the charge on an ion with 28 protons and 26 electrons?

How does phosphorus enter the human body?

When a reaction occurs between atoms with ground state electron configuration 1s2 2s1 and 1s2 2s2 2p5 the predominant type of bond formed is

How does heat transfer takes place between any two systems?

Hydrate name of CaCl2 * 8 H2O

Calculate the heat evolved from a mixture of 14.1 l of sulfure dioxide