February 21, 2020, 05:33:48 AM
Forum Rules: Read This Before Posting

0 Members and 1 Guest are viewing this topic.

#### bg105ee056

• Very New Member
• Posts: 2
• Mole Snacks: +0/-1
« on: December 07, 2006, 07:28:24 AM »
how much hydrogen gas (volume) would be required to lift a mass of 1 K.g. Like in the case of an hydrogen balloon.

#### Borek

• Mr. pH
• Deity Member
• Posts: 25501
• Mole Snacks: +1669/-398
• Gender:
• I am known to be occasionally wrong.
« Reply #1 on: December 07, 2006, 09:10:27 AM »
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info

#### billnotgatez

• Global Moderator
• Sr. Member
• Posts: 3888
• Mole Snacks: +212/-55
• Gender:
« Reply #2 on: December 08, 2006, 08:00:55 AM »

#### Donaldson Tan

• Editor, New Asia Republic
• Retired Staff
• Sr. Member
• Posts: 3178
• Mole Snacks: +261/-12
• Gender:
« Reply #3 on: December 08, 2006, 02:09:53 PM »
The Ideal Gas Equation will give you a good estimate of the volume.
"Say you're in a [chemical] plant and there's a snake on the floor. What are you going to do? Call a consultant? Get a meeting together to talk about which color is the snake? Employees should do one thing: walk over there and you step on the friggin� snake." - Jean-Pierre Garnier, CEO of Glaxosmithkline, June 2006

#### kommyching

• New Member
• Posts: 3
• Mole Snacks: +0/-0
« Reply #4 on: July 01, 2008, 10:10:09 AM »
As the molar mass of hydrogen gas is 2 grams/mole.
1000 kg of hydrogen gas contains 500 moles of hydrogen molecule.
Under room condition(25 Degree Celsius and 1 atmospheric pressure), 1 mole of gas molecule occupy 24.0 cubic decimeter.
Therefore 500 moles= 500*24 cubic decimeter=1200 cubic decimeter.

#### Borek

• Mr. pH
• Deity Member
• Posts: 25501
• Mole Snacks: +1669/-398
• Gender:
• I am known to be occasionally wrong.
« Reply #5 on: July 01, 2008, 01:38:18 PM »
As the molar mass of hydrogen gas is 2 grams/mole.
1000 kg of hydrogen gas contains 500 moles of hydrogen molecule.

No. What is difference between g and kg?

Not that it is in any way related to the original question.
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info, pH-meter.info

#### Mitch

• General Chemist
• Sr. Member
• Posts: 5290
• Mole Snacks: +376/-2
• Gender:
• "I bring you peace." -Mr. Burns
« Reply #6 on: July 07, 2008, 02:52:55 AM »
Umm... I actually wouldn't know how to approach this one, any suggestions? And if anyone says look at #1 in my sig....
Most Common Suggestions I Make on the Forums.
1. Start by writing a balanced chemical equation.
2. Don't confuse thermodynamic stability with chemical reactivity.
3. Forum Supports LaTex

#### sjb

• Global Moderator
• Sr. Member
• Posts: 3406
• Mole Snacks: +213/-42
• Gender:
« Reply #7 on: July 07, 2008, 03:35:12 AM »
Umm... I actually wouldn't know how to approach this one, any suggestions? And if anyone says look at #1 in my sig....

Something along the lines of http://www.chem.hawaii.edu/uham/lift.html ? perhaps - but the figures seem a little low (not enough lift)

S

#### Borek

• Mr. pH
• Deity Member
• Posts: 25501
• Mole Snacks: +1669/-398
• Gender:
• I am known to be occasionally wrong.