For the reaction 2H2O > 2H2 + O2 what is the total number of moles of O2 produced from the complete decomposition of 8 moles H2O .
b- 3 moles
c- 4 moles
d- 8moles

Option C) 4 moles

Explanation:

The reaction below shows the decomposition of 2 moles of water to yeild 2 moles of hydrogen and 1 mole of oxygen respectively.

2H2O(l) --> 2H2(g) + O2 (g)

So, if 2 moles of H2O produce 1 mole of O2

8 moles of H2O will produce Z mole of O2

To get the value of Z, cross multiply

2 x Z = 1 x 8

2Z = 8

Z = 8/2

Z = 4

Thus, 4 moles of O2 is produced from the complete decomposition of 8 moles H2O .

zfoods? ok, pressure is used to keep the heat inside and to keep the food perfect.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

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