How many grams each of hydrogen gas and oxygen gas are required to produce 4.50 mol of water?

im new to chemistry and need help with this problem. please help

How many grams each of hydrogen gas and oxygen gas are required to produce 4.50 mol of water?

How Do Methane And Steam Produce Hydrogen Gas?

I have a homework question:
“The industrial process for producing hydrogen gas involves reacting methane and steam at a high temperature. Predict the direction of equilibrium shift for each of the following stresses…”
My problem is I don’t know what the equation for this process is! Can? anyone tell me

Why Is Hydrogen Gas Expensive To Produce?

i heard hydrogen gas is expensive to produce. why cant one just simply extract hydrogen from water?

Would A Water/fuel Satellite Dump Produce This Shape/phenomena?

I posted a question on this earlier, but this evening around 7:45 in southern CT, my friends and I witnessed a small light with a cone of light attached behind it ascending slowly. The light disappeared along with the cone of light, leaving a cloudy smoke-like spot in the sky, until that dissipated too. Would a water/fuel satellite dump produce this triangular shape?
This is a picture of it once it almost disappeared: http://www.flickr.com/photos/viamoi/3935870956/
For anyone else that might of saw it (it was spotted in NY, NJ, CT, PA, MA and RI) did it look anything like this to you? :

When Hexane, C6h14 (a Gasoline Component) Burns To Produce Water And Carbon Dioxide (co2).?

a) identify the reactants and the products of this reactant and the product of this reaction
b) write a balanced equation for the reaction
c)is this reaction endothermic of exothermic?
please help me do this

Does Water In Gasoline Produce Less Hydrocarbons?

I am trying to lower the hydrocarbon output of my chev blazer 4.3 L engine the allowable output for emission test is 0.99 my reading is 2.63.

what are the symbols for the chemicals that are produce after your car uses gasoline?

what are properties any other chemicals that might substitute for gasoline must have?
can water be made into gasoline?