Calculate the volume in g of 13 g methane gas at STP.

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

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.

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.