Mars+Now

How to go to Mars right now. http://spectrum.ieee.org/aerospace/space-flight/how-to-go-to-marsright-now

Collecting Water on Mars or the Moon http://en.wikipedia.org/wiki/In-situ_resource_utilization

http://www.mars-one.com/faq/health-and-ethics/will-the-astronauts-have-enough-water-food-and-oxygen

http://forum.onlineconversion.com/showthread.php?t=10423 What is the total volume of hydrogen gas and oxygen gas produced by electrolysis of 1 liter of distilled water at 21 degrees Celsuis and 1 atmosphere pressure? What is the formula for this? Thanks in advance! || 2 H2O --> 2 H2 + O2, so 2 moles of water produces 2 moles of H2 gas and 1 mole of O2.
 * Originally Posted by **fredh**

1 L of water at 21 °C has density 0.998 kg/L, molar mass 18.0153 g/mol, so 55.40 moles.

You will produce 55.40 moles H2 and 27.70 moles of O2.

At 1 atm, 0 °C, 1 mole of ideal gas has volume of 22.414 L, at 21 °C, 24.14 L (use ideal gas law)

Thus about 669 L O2 and 1337 L of H2.

____________________________ How much oxygen does a person use in a day? The average adult at rest inhales and exhales something like 7 or 8 liters (about one-fourth of a cubic foot) of air per minute. That totals something like 11,000 liters of air (388 cubic feet) in a day. The air that is inhaled is about 20-percent oxygen, and the air that is exhaled is about 15-percent oxygen, so about 5-percent of the volume of air is consumed in each breath and converted to carbon dioxide. Therefore, a human being uses about **550 liters of pure oxygen** (19 cubic feet) per day. A person who is [|exercising] obviously uses a lot more oxygen than that. You could determine how much air is moving through your [|lungs] by exhaling into a plastic bag of known volume at each breath and seeing how long it takes to fill the bag. http://health.howstuffworks.com/human-body/systems/respiratory/question98.htm

Terraforming http://www.pbs.org/exploringspace/mars/terraforming/page6.html