50.0-g block is 40.0% submerged. what is the mass of the submerged portion of the block?

Drive down any three characteristic of modern periodic table

What is a metal replacement reaction

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.