its c with the older down the older it is
A gas with a vapor density greater than that of air, would be most effectively displaced out off a vessel by ventilation.
The two following principles determine the type of ventilation: Considering the impact of the contaminant's vapour density and either positive or negative pressure is applied.
Consider a vertical tank that is filled with methane gas. Methane would leak out if we opened the top hatch since its vapour density is far lower than that of air. A second opening could be built at the bottom to greatly increase the process' efficiency.
A faster atmospheric turnover would follow from air being pulled in via the bottom while the methane was vented out the top. The rate of natural ventilation will increase with the difference in vapour density. Numerous gases that require ventilation are either present in fairly low concentrations or have vapor densities close to one.
Answer:
,
Explanation:
Hydrocarbons are compounds which only consist of hydrogen atoms and carbon atoms. The presence of any other atom, such as oxygen, any halogen, nitrogen or sulfur, would not let us classify a compound as hydrocarbon.
Regardless of the number of atoms present in the structure, all we need to identify a hydrocarbon is just to make sure that it contains merely carbon and hydrogen atoms.
Notice that the first compound only consists of C and H atoms, so it is a hydrocarbon, just as compound 2.
The third and the fourth compounds have oxygen in them, so they are not hydrocarbons, as they don't have only C and H atoms in them.
Explanation:
To balance half equations of a redox reaction is important to not only balance the mass (ammount of atoms of each element in both sides of the equation), but also balance the charges (ion's charges and electrons).
<u>For example: </u>
The reaction:
First step is to identify the element oxidized (loses electrons/valence increases) and the element reduced (gains electrons/valence decreases)
- Fe is oxidized (valence from +2 to +3)
- Mn is reduced (valence from +7 to +2)
So we have to half equations:
Oxidation equation
Here the mass is balanced, but the charges aren't. Balancing:
Reduction equation
<u>Balancing the mass with H2O and H+</u> (assuming acid medium)
<u>Balancing charges</u>
Global balance
this is due to the difference in electron density. Butylamine has more electron density than ammonia. Due to this reason is a Butylamine stronger base than ammonia. BUtylamine has positive induction effect of -CH3 group electron density on N atom which increases