How to solve chemical reactions

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

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.

Avariable that is not being directly tested during an experiment should be changed varied experimented controlled