Someone ! explain, in terms of molecular structure or distribution of charge, why a molecule of methane, ch4 is nonpolar

Use the table to identify the phase and phase changes of the elements under the given conditions. write the name of the substance, phase, or phase change

11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg

What is the area in square meters of 448 g ai foil that has a thickness of 23921 nm? the density is 2.70 g/cm