Posted by **Anonymous** on Sunday, February 27, 2011 at 11:06pm.

The volume of an adult's stomach ranges from about 50 mL when empty to 1 L when full.If its volume is 500 mL and its contents have a pH of 2, how many moles of H+ does it contain?

- chem -
**DrBob222**, Monday, February 28, 2011 at 12:25am
pH = -log(H^+).

Solve for (H^+) and the answer is in molarity which is moles/L.

Then moles = M x L = ??

- Chem -
**Joseph **, Tuesday, March 1, 2011 at 5:06pm
You are given pH which is (-log[H^+] ). so first you take 10^-2 to get the Molarity of [H^+], then you convert 500 mL to Liters so divide 500 by 1000. Finally you take Molarity times volume in liters to get moles of H^+.

10^-2 = .01

500/1000 = .5

.01 * .5 = 5*10^-3 = Moles of H^+ ions.

## Answer This Question

## Related Questions

- science - how would you make 500.0mL of a 0.200M NaOH solution from a 15.0 M ...
- chem - Show work 1. How many moles of oxygen will occupy a volume of 2.50 liters...
- chem - A sample containing 6.40 g O2 gas has a volume of 15.0 L. Pressure and ...
- Chem - Then, determine the final volume needed to dilute 20.0 ml of 1.00 M NaOH...
- chem - can someone plz help me with this? What mass of sucrose (C12H22O11) must ...
- Math - 30 flasks--10 full, 10 half-empty, and 10 entirely empty--are to be ...
- chem - a 45.8mL sample of a 5.8 M KNO3 solution is diluted to 1.00L. What volume...
- area/length/volume - How are length, area, and volume related in terms of the ...
- Chem - To what temperature in K must a variable volume container of helium gas ...
- Physics - A balloon has a volume of 1000 m3 and a mass of 500 kg when empty. ...

More Related Questions