2 oxygen,4 hydrogen, 4 hydrogen, and 2 oxygen so overall 12
2H2O2 ==> 2H2O + O2 the equation is balanced
NO!!! 2H2 means that there are four ( 2 x 2) hydrogen atoms , in two molecules each of two atoms. Similarly 2O2 means that there are four ( 2 x 2) oxygen atoms , in two molecules each of two atoms. However, 2H2O means H2O + H2O . Each H2O is H-O-H plus H-O-H This means that there are 4 hydrogen atoms , but only 2 oxygen atoms. So a reaction is 2H2 + 2O2 = 2H2O + O2 ( 2 oxygen atoms (O=O) remain unused). More correctly this would be written as 2H2(g) + O2(g) = 2H2O(l)
2H2O--->2H2 + O2 is a redox reaction because electrons are exchanged during electrolysis.
O2(g)+2H2(g) -> 2H2O(g) (Remmeber heat/energy must also go into the reaction.) 2H2 + O2 ---> 2H2O
The balanced chemical equation is 2H2 + O2 → 2H2O. This means that the coefficients are 2, 1, and 2, respectively.
Water can be broken down to oxygen and hydrogen and hydrogen can be ignited in oxygen to form water. 2H2O --> 2H2 + O2 (takes energy) 2H2 + O2 --> 2H2O (releases energy)
2H2O2 ==> 2H2O + O2 the equation is balanced
NO!!! 2H2 means that there are four ( 2 x 2) hydrogen atoms , in two molecules each of two atoms. Similarly 2O2 means that there are four ( 2 x 2) oxygen atoms , in two molecules each of two atoms. However, 2H2O means H2O + H2O . Each H2O is H-O-H plus H-O-H This means that there are 4 hydrogen atoms , but only 2 oxygen atoms. So a reaction is 2H2 + 2O2 = 2H2O + O2 ( 2 oxygen atoms (O=O) remain unused). More correctly this would be written as 2H2(g) + O2(g) = 2H2O(l)
2H2 + O2 ---> 2H20 is balanced when total numbers of atoms of EACH element seperately are equal on both sides ('Reactant' and 'Product' side): Left (2x H2=) 4 H atoms and (1x2 O=) 2 O atoms Right (2x H2=) 4 H's and (2x1 O=) 2 O's
4
2h2 + o2 -> 2h2o All letters capitalized!!
2H2O--->2H2 + O2 is a redox reaction because electrons are exchanged during electrolysis.
2h2 + o2 ----> 2h2o
No, chemical reactions can be reversed. For example: 2H2O -> 2H2 + O2 can change back, 2H2 + O2 -> 2H2O
= H2+O2 =2H2+O2=2H2O
O2(g)+2H2(g) -> 2H2O(g) (Remmeber heat/energy must also go into the reaction.) 2H2 + O2 ---> 2H2O
They are reversible reactions. 2H2 + O2 ----> 2H2O (formation of water) 2H2O ----> 2H2 + O2 (decomposition of water)