A marble with a mass of 9.80 grams is placed inside a graduated cylinder. The volume of water in the graduated cylinder rises from 10.0 to 13.1 mlCalculate the density of the marble.

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.

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

Asample of sea water contains 6.28g of sodium chloride per litre of solution. how many milligrams of sodium chloride would be contained in 15.0ml of this solution?