An element having various atomic masses is called a(n) .

Which of the following elements would you expect to have the lowest ionization energy value? fluorine, lithium, neon, nitrogen

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.)

What happened to the amount of carbon dioxide in the atmosphere from 2010–2017?