What is the mass percentage of water in the hydrate AI(NO3)3-9h2o?

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.

Explain how the integumentary system plays a crucial role in the ability to maintain homeoestasis

Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.