To which of the three main chemical classes does Mercury (Hg) belong? a) It's not an element in the periodic table
b) Metalloids
c) Non-metals
d) Metals

Nitrogen (n), phosphorus (p), and potassium (k) are the main nutrients in plant fertilizers. according to an industry convention, the numbers on the label refer to the mass percents of n, p2o5, and k2o, in that order. calculate the n: p: k ratio of a 30: 10: 10 fertilizer in terms of moles of each element, and express it as x: y: 1.0.

What type of reaction is shown below? check all that apply. 2h2o2 → 2h2o + o2 synthesis decomposition combustion

What shape would a molecule with two bound groups and two lone pairs have?