How many oxygen atoms are contained in a sample of aluminum nitrate, Al(NO3)3, with a mass of 4.285 x 10-21 g? (molar mass of Al(NO3)3 is 213 g mol-l)
a 109
b. 54
c. 9
d. 3

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

Building glycogen from glucose molecules is an example of