Name the chemical family to which each of the following elements belongs. KZU
(a) chlorine, CI
(b) magnesium, Mg
(c) potassium, K
(d) helium, He

In numbering carbon atoms in the parent chain of a hydrocarbon, why would you number from right to left, rather than left to right

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.)

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.