Plzz help me 14. An element that emits energy by nuclear decay is

A. radioactive.

B. an ion.

C. an anion.

D. a cation.

Describe in detail the melting point behavior of the 80: 20 benzoic acid-mandelic acid mixture

It takes 945.kj/mol to break a nitrogen-nitrogen triple bond. calculate the maximum wavelength of light for which a nitrogen-nitrogen triple bond could be broken by absorbing a single photon.

When 225mg of anthracene, c14h10(s), was burned in a bomb calorimeter the temperature rose by 1.75k. calculate the calorimeter constant. by how much will the temperature rise when 125mg of phenol, c6h5oh(s), is burned in the calorimeter under the same conditions? (δch< (c14h10,s)=–7061 kj mol−1.)