The answer is: <span>The principal idea here is how r they obtained:
for example: sodium u put equal molar concentrations of sodium (Na) and sodium ion (Na+) together in a beaker , then dip in this solution a platinium wire (zero potential) which is connected to a normal hydrogen electrode (electrode with zero potential) then u see the reading of the whole circuit
if it is negtive, this means negative potential which means that the reducing property predominates where Na(reducing agent) is oxidized and electrons r accumulated on the platinum which gives it negative charge
This means that (Na) is a reducing agent, its strength depends on the value of the potential obtained, and here the table can help you
If u want to know if it's strong red. agent, look for it in the table, see if it has higher reduction potentail (or lower oxidation potential, same idea) than most other substances then it is reducing agent
and vice versa
So if we look at ur examples, u will find that MnO4- is the very strong oxidizing agent (has highest oxidation potential) (lowest reduction potential)
H+ and H2 are both with zero potential, no redox properties
And lastly Na and Na+:
This u can know from ur knowledge in chemistry, that sodium is very rarely found in elemental form and always in the form of ion so u can deduce that Na is the very strong reducing agent
or u can see the value of its standard oxi or red potetial and deduce which is the predominating form of them.
I hope this helps</span>
Answer:
<em>H.vap = 6.544 kJ/mol</em>
Explanation:
Clausius-Clapeyron Equation
<em>In P = H.vap / RT</em> where T = 20 + 273 = 293K
H.vap = In P (RT) = In 11 (8.314 x 293) = 6543.861 J/mol = 6.544 kJ/mol
Answer:
an exposure to a virus is actually having the virus and developing an immunity to a virus is similar because to be immune to a virus you have to receive a vaccine and a vaccine is actually the disease injecting into your system in a different way so when the virus attacks you your body cells know what to do to fight the disease.
Explanation:
Answer:
Organism best adapted to the environment are able to survive in nature!
Explanation:
Suppose there was a green forest but after a volcano eruption all the green colored vegetation is lost and the area turns black . Now some organisms did survive...you have a black rat, and a white rat. You also have vultures flying in sky looking for prey. Overtime, the organism best adapted to environment can reproduce more and survive in nature. In our example, the black rats are the best adapted because their color matches with the environment so the eagles or vultures would have a hard time spotting them, whereas, a white rat in a black environment can be easily spotted so it has less adaptation to the nature.
Answer:
22.9g of H₂O are produced
Explanation:
The reaction of hydrogen with oxygen is:
2H₂(g) + O₂(g) → 2H₂O(g)
<em>Where 2 moles of hydrogen react with 1 mole of oxygen to produce 2 moles of water</em>
<em />
Moles of hydrogen are:
2.56g × (1mole / 2.01g) = <em>1.27moles H₂</em>
Moles of oxygen are:
20.3g × (1mole / 32g) = <em>0.634moles O₂</em>
These moles of oxygen react with:
0.634moles O₂ × (2mol H₂ / 1mol O₂) =<em> 1.27mol H₂</em>
<em>-All hydrogen in reaction-</em>
And produce:
0.634moles O₂ × (2mol H₂O / 1mol O₂) =<em> 1.27mol H₂O</em>
In grams:
1.27mol <em>H₂O </em>× (18.01g / 1mol) = <em>22.9g of H₂O are produced</em>
