Calculate the mass percent of a nacl solution in which 140g of nacl is dissolved in 4.50l of water at 25c (density = 0.997g/ml).

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 must happen before a body cell can begin mitotic cell division

Calculate the number of moles of ethane in 100 grams