Combustion
It is an example of a simple chemical reaction. In a combustion reaction, oxygen reacts with another substance to produce carbon dioxide gas and water vapor.
Answer:
[(x-37.5)/x]*100%
62.5% (assuming the original sample weighs 100.0g)
Explanation:
Let's say that the original sample is x
Mass of I-125 which has decayed: x-37.5
Percentage of decayed mass: [(x-37.5)/x]*100%
Please recheck, for this may not be the correct answer
Answer:
Hydrogen
1. has one electron in the outermost shell
2.It is less electronegative
Oxygen
3.It requires two electrons to complete its outer shell
4.It is more electronegative
Explanation:
Each hyrogen of two will share its electron with oxygen.Oxygen requires two electrons to complete its outer shell so it will share with two hydrogen. Covalent bonds formed will be polar as oxygen will attract electrons towards it due to high electronegativity. This happens in water molecule
Answer:
Carbon Dioxide
Explanation:
Plants inhale Carbon Dioxide and exhale Oxygen