G.chem Help

[tonykangus]

Hi everbody.
Anybody can help me these questions? Thank you.

Anybody knows how to slove this questions? Thank You...
1. Waht volume of HCl was added if 20ml of 1M NAOH is titrated with 1M HCl to produce a pH=2?


2.How many Faradays are required for the reduction of 2mol of Fe3+ to Fe(s)?


3.If you ahve a solution of 1l of H2O and 234g of NaCl, What is the osmotic pressure at STP (R=0.1l*atm/mol*K)?


4.What is dentisty of amonia gas at 2.00atm pressure and 25.0 *C(R=0.1atm L/molK)?

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[DrTacoElf]

3.If you ahve a solution of 1l of H2O and 234g of NaCl, What is the osmotic pressure at STP (R=0.1l*atm/mol*K)?

P=Molarity*R*T