4) Examine each molecule below. Use the periodic table of the elements to find the name of each element. Then, identify each element present and the number of atoms for each. Molecule/Elements/Num of Atom NO2 Nitrogen&Oxygen 1 / 2 H2S ? ? HCl ? ? NaCl ? ? CaCO3 ? ?

According to the diagram, what sources contribute to the phosphorus found in soil? according to the diagram, phosphorus found in soil contributes phosphorus to what other sources?

Rank the four gases (air, exhaled air, gas produced from from decomposition of h2o2, gas from decomposition of nahco3) in order of increasing concentration of co2

Covalent bonds generally form when the bonded elements have a difference in electronegativity less than 1.5. subtract the electronegativities for the following pairs of elements and predict whether they form a covalent bond. electronegativity difference of c and c: ionic covalent electronegativity difference of mg and cl: ionic covalent