Need plzz
why are enzymes important?

(a)they speed up chemical reactions.

(b)they the cell maintain its shape.

(c)they contain the genetic material.

(d)they bring water into the cell.

Find the mass in grams of 1.37x1020 particles of h3po4

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?

Which is an example of the practical pursuit of alchemy? a. forming perfect substances. b. transforming base metals. c. developing metalworking techniques. d. linking spiritual characteristics with material substances.