# chem

posted by .

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 -

pH = -log(H^+).
Solve for (H^+) and the answer is in molarity which is moles/L.
Then moles = M x L = ??

• Chem -

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.

## Similar Questions

1. ### chem

a 45.8mL sample of a 5.8 M KNO3 solution is diluted to 1.00L. What volume of the diluted solution contains 15.0g KNO3?
2. ### science

how would you make 500.0mL of a 0.200M NaOH solution from a 15.0 M stock NaOH solution?
3. ### chem

can someone plz help me with this? What mass of sucrose (C12H22O11) must be dissolved to make 460 mL of a 1.10M solution?
4. ### chem

A sample containing 6.40 g O2 gas has a volume of 15.0 L. Pressure and temperature remain constant. a. What is the new volume if 0.600 mole O2 gas is added?
5. ### Chemistry

A number of antacid tablets contain water-insoluble metal hydroxides such as milk of magnesia, Mg(OH)2. Stomach acid is about 0.10 mol/L HCl(aq). Calculate the number of millimetres of stomach acid that can be neutralized by 500 mg …
6. ### Math

30 flasks--10 full, 10 half-empty, and 10 entirely empty--are to be divided among 3 sons so that flasks and contents should be shared equally. How may this be done?
7. ### Chem

Then, determine the final volume needed to dilute 20.0 ml of 1.00 M NaOH to 0.25 M. Next, find the volume of water which needs to be added. Finally, determine the moles and the mass in grams of NaOH in the solutions. Do I take 60 ml …
8. ### Chem

A bicycle pump inflates a tire whose volume is 577 mL until the internal pressure is 627 kPa at a temperature of 21.7°C. How many moles of air does the tire contain?
9. ### chem

Show work 1. How many moles of oxygen will occupy a volume of 2.50 liters at 121.6 kPa and 331 K?
10. ### chemistry

An empty beaker weighs 39.17 g. a) When completely filled with water, the beaker and its contents have a total mass of 406.25 g. What volume does the beaker hold?

More Similar Questions