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The activation energy barrier. Combining H atoms and O atoms into water releases a large amount of energy, but breaking up H2 molecules and O2 molecules into H and O atoms requires a large (but not as large) amount of energy. You need to supply sufficient energy to get things started, after which it's generally self-sustaining (and very rapidly so; a stoichiometric mixture of H2 and O2 is quite explosive once ignited).
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H2 plus O2 equals H2O If you have 1.42 moles of hydrogen how many moles of oxygen will react with it?
Balanced equation first. 2H2 + O2 >> 2H2O 1.42 mol H2 ( 1mol O2/2mol H2 ) = 0.71mol O2 to react with H2
What do we get if you mix sulphric acid and zinc?
They react and form hydrogen gas and white solid compound zinc chloride. Zn + 2HCl = ZnCl2 + H2
How many moles K are needed to react with 15 moles of Cl2?
H2 +Cl2---------------->2HCl Since H2 and Cl2 react in 1:1 mole ratio the number of moles of H2 reacting is equal to the number of moles of Cl2 which is equal to 0.213
How many molecules of H2 react with each molecule of N2?
Three: The reaction equation is N2 + 3 H2 -> 2 NH3
When h2 and o2 react water vapor is produced what type of reaction is this?
decomposition
H2 plus O2 equals H2O If you have 1.42 moles of hydrogen how many moles of oxygen will react with it?
Balanced equation first. 2H2 + O2 >> 2H2O 1.42 mol H2 ( 1mol O2/2mol H2 ) = 0.71mol O2 to react with H2
What do we get if you mix sulphric acid and zinc?
They react and form hydrogen gas and white solid compound zinc chloride. Zn + 2HCl = ZnCl2 + H2
What will form when NO2 react with HCl?
nacl2+h2
Acids generally release h2 gas when they react with what?
Metals
What substance can acids react to produce hydrogen gas?
Acids react with metals to evolve H2 gas
How many moles K are needed to react with 15 moles of Cl2?
H2 +Cl2---------------->2HCl Since H2 and Cl2 react in 1:1 mole ratio the number of moles of H2 reacting is equal to the number of moles of Cl2 which is equal to 0.213
Will Sodium react with water and one of the products is H2?
Yes. Sodium will react vigorously with water. The reaction is very exothermic and may even cause fire. 2Na + 2H2O ---> 2NaOH + H2
How many grams of chlorine are required to completely react with 0.65 g of H2 to produce HCl?
To completely react with 0.65 g of H2 to produce HCl we need 23.08 g chlorine.
How many moles of H2 are needed to react with 0.90?
6moles of hydrogen
What is the gas produced when dilute acids react with metals?
H2 gas
How many molecules of H2 react with each molecule of N2?
Three: The reaction equation is N2 + 3 H2 -> 2 NH3
What happens if you mix alcohol and magnesium?
If mixed, Ethanol and Magnesium will react and form Hydrogen gas and Magnesium Ethoxide. 2 CH3CH2OH(liq) + Mg(s) -> (CH3CH2O)2Mg(s) + H2(g)
