Cars, aeroplanes, factories etc
Answer:
82.6 moles
Explanation:
chemical equation:
CO2+ 4H2 → CH4 + 2H2O
Given data:
moles of carbon dioxide = 82.6 mol
moles of methane = ?
through the balanced chemical equation we will compare the moles carbon dioxide with methane
CO2 : CH4
1 : 1
82.6 : 82.6
we are given hydrogen so 82.6 moles of carbon dioxide will produce 82.6 moles of methane.
Answer:
![CaH_2(s) +2H_2O(l) \rightarrow Ca(OH)_2 (aq) + 2H_2 (g)](https://tex.z-dn.net/?f=CaH_2%28s%29%20%2B2H_2O%28l%29%20%5Crightarrow%20Ca%28OH%29_2%20%28aq%29%20%2B%202H_2%20%28g%29)
Explanation:
![CaH_2(s) +H_2O(l) \rightarrow Ca(OH)_2 (aq) + H_2 (g)](https://tex.z-dn.net/?f=CaH_2%28s%29%20%2BH_2O%28l%29%20%5Crightarrow%20Ca%28OH%29_2%20%28aq%29%20%2B%20H_2%20%28g%29)
In this reaction, calcium is balanced in either side. No. of atoms of 'H' and 'O' are not balanced. To balance O atoms, multiply
by 2. Now the reaction becomes:
![CaH_2(s) +2H_2O(l) \rightarrow Ca(OH)_2 (aq) + H_2 (g)](https://tex.z-dn.net/?f=CaH_2%28s%29%20%2B2H_2O%28l%29%20%5Crightarrow%20Ca%28OH%29_2%20%28aq%29%20%2B%20H_2%20%28g%29)
Now, to balance H atoms, multiply H2 by 2.
![CaH_2(s) +2H_2O(l) \rightarrow Ca(OH)_2 (aq) + 2H_2 (g)](https://tex.z-dn.net/?f=CaH_2%28s%29%20%2B2H_2O%28l%29%20%5Crightarrow%20Ca%28OH%29_2%20%28aq%29%20%2B%202H_2%20%28g%29)
Now, each element is balanced.