A sample of water has 2.9 x 10^24 molecules in it. How many moles of water are in the sample?

Calculate the expected ph values of the buffer systems from the experiments (a, b,c, d), using the henderson- hasselbalch equation, ph-pka+log[a-]/[ha]. use for pka values carbonic acid= 6.37, and acetic acid= 4.75.

How many grams of aluminum will there be in 98g of al2o3?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation: