Chemical energy is the energy that bonds atoms are ions together. This energy is released when the chemical bonds are released. Atoms or ions bond together to form molecules or compounds. Breaking the bonds of these molecules release energy. The food we eat contains chemical energy. When oxygen is combined to sugars in food via the process of respiration, the bonds in the sugar molecules are broken and the energy that is released is used to carry out bodily functions. <span />
False because if the water goes below critical temp it would be frozen
Answer:
12.8 g of 
must be withdrawn from tank
Explanation:
Let's assume gas inside tank behaves ideally.
According to ideal gas equation- 
where P is pressure of , V is volume of , n is number of moles of , R is gas constant and T is temperature in kelvin scale.
We can also write, 
Here V, T and R are constants.
So, 
ratio will also be constant before and after removal of from tank
Hence, 
Here, 
and 
So, 
So, moles of must be withdrawn = (0.66 - 0.26) mol = 0.40 mol
Molar mass of = 32 g/mol
So, mass of must be withdrawn = 
Radon is <span>not a source of air pollution related to human activities</span>
