Most of the elements of which region of the periodic table are located directly to the right of the metaloids?
2 answers:
Answer:
B. Nonmetals
Explanation:
Metalloids are elements that have properties that are intermediate between metals and nonmetals, these elements are heat and electricity semiconductors
This means that, generally, metalloids are better conductors of heat and electricity than nonmetals, but not as much as metals.
In the periodic table the metalloids are found diagonally from boron to polonium. The elements that are on the upper right are nonmetals, and those that are on the lower left are metals
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<u>Answer:</u> The value of for the reaction at 690 K is 0.05
<u>Explanation:</u>
We are given:
Initial pressure of = 1.0 atm
Total pressure at equilibrium = 1.2 atm
The chemical equation for the decomposition of phosgene follows:
Initial: 1 - -
At eqllm: 1-x x x
We are given:
Total pressure at equilibrium = [(1 - x) + x+ x]
So, the equation becomes:
The expression for for above equation follows:
Putting values in above equation, we get:
Hence, the value of for the reaction at 690 K is 0.05
Explanation:
Starting moles of ethanol acid = 0.020 mol
At the equilibrium 50 % of the ethanol acid molecules reacted
∴ Moles of ethanol acid reacted = 0.020 mol * 50 %/100 %
= 0.010 mol
Moles of ethanol acid remain = 0.020 mol + 0.010 mol = 0.010 mol
Moles of the product gas formed are calculated as
0.010 mol CH3COOH * 1 mol / 2 mol CH3COOH
= 0.005 mol
Therefore at the equilibrium total moles of gas present in the vessel are 0.010 mol CH3COOH and 0.005 mol
That is total gas moles at equilibrium = 0.010 mol + 0.005 mol = 0.015 mol
Now Calculate the pressure :
0.020 mol gas has pressure of 0.74 atm therefore at the same condition what will be the pressure exerted by 0.015 mol gas
P1/n1 = P2/n2
P2 = P1*n2 / n1
= 0.74 atm * 0.015 mol / 0.020 mol
= 0.555 atm