Amagnifying glass is an example of a lens.
a. plano-concave
b. converging
c. plano-convex
d. double-concave

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.

Asolution contains 180 g of glucose (c6h12o6) and 162 g of water. what is the mole fraction of glucose?