Mg + 2HCl => MgCl2 + H2
2 moles HCl : 1 mole H2.
2.02 x .5 moles = 1.01
1.01g H2
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FeSO4 and Hydrogen sulphide
Deep blue.
nitrogen and hydrogen reacted over an iron catalyst
Mg + H2SO4 -> MgSO4 + H2 Hydrogen gas.
The Hydrogen will burn fiercely with a lambent blue flame and water will be produced.
2H2 + O2 ---------------> 2H2O for every 2 moles of hydrogen that reacts, 2 moles of water are produced, thus a 1:1 ratio of water produced to hydrogen reacted. So:- 2.5 moles of hydrogen reacted will produce 2.5 moles of water
.033 mol H2
When they are reacted, a base and hydrogen gas is produced. This reaction is exothermic.
Oxygen
Oxygen
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Hydrogen will be liberated.
Aluminum is a silvery metal that will evolve hydrogen gas when reacted with a strong acid. Aluminum will also evolve hydrogen gas as a product of its reaction with a strong acid.
0,3 moles of nitrogen reacted.
The iron in haemoglobin is reduced oxidised by the hydrogen peroxide which is an oxidising agent.
Iron reacted with a strong acid would probably be cheapest, but aluminum reacted with sodium hydroxide solution is commonly used when hydrogen needs to be produced at remote sites like for weather balloons. Iron only reacts slowly with acid but the reaction between aluminum and sodium hydroxide is very rapid (and dangerous if it is not carefully controlled) producing large quantities of hydrogen. 1 mole of Aluminium will produce 1.5 moles of hydrogen gas or about 1 liter of hydrogen gas for every gram of aluminum.