Moles/molecules t04/s14
if a sample of (ch3)2co is found to contain 6.49 mol of c atoms how many moles of h atoms are present?
molar mass
(ch3)2co
c atom
h atom
o atom
avogadro's
6.022x1023

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.

15. which of the following is not human-caused groundwater pollution? a. water in an aquifer dissolves elements such as arsenic and mercury from surrounding rock. b. water in an aquifer is contaminated by leachate that seeps into the ground from a landfill. c. water in an aquifer becomes polluted with chemicals used in hydraulic fracturing, or fracking. d. water in an aquifer absorbs harmful bacteria from the drainage field of a septic tank.