Answer: 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 .
Answer : The correct option is, (B) 2, 3 and 6.
Explanation :
Combustion reaction : It is a type of reaction where a hydrocarbon react with an oxygen molecule to give carbon dioxide, water as a product.
In general,
![Hydrocarbon+O_2\rightarrow H_2O+CO_2](https://tex.z-dn.net/?f=Hydrocarbon%2BO_2%5Crightarrow%20H_2O%2BCO_2)
For example : Ethane react with oxygen to give carbon dioxide and water.
![C_2H_8+4O_2\rightarrow 2CO_2+4H_2O](https://tex.z-dn.net/?f=C_2H_8%2B4O_2%5Crightarrow%202CO_2%2B4H_2O)
In the given list,
is a reactant and
are the products.
Therefore, the correct answer is, (B) 2, 3, and 6
Answer:
C. pieces of hair found at the crime scene.
Explanation:
using the pieces of hair, you can get the DNA of the person. This will give u a better lead in solving the crime.
Hope it helps u ....