How many significant figures are in 463?

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer

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.

Adilute aqueous potassium nitrate solution is