Answer:
77 moles
Explanation:
The given chemical compound is CCl2F2 is called Dichlorodifluoromethane. In CCl2F2, we have:
one mole of a Carbon atom.
two moles of Chlorine atom; &
two moles of Fluorine atom.
Given that one mole of Chlorine = 38.5 moles.
Then, two moles will be:
= 2 × 38.5 moles
= 77 moles
The answer for the following problem is mentioned below.
- <u><em>Therefore the final temperature of the gas is 740 K</em></u>
Explanation:
Given:
Initial pressure of the gas (
) = 1.8 atm
Final pressure of the gas (
) = 4 atm
Initial temperature of the gas (
) = 60°C = 60 + 273 = 333 K
To solve:
Final temperature of the gas (
)
We know;
From the ideal gas equation;
we know;
P × V = n × R × T
So;
we can tell from the above equation;
<u> P ∝ T</u>
(i.e.)
<em> </em>
<em> = constant</em>
= 
Where;
= initial pressure of a gas
= final pressure of a gas
= initial temperature of a gas
= final temperature of a gas
= 
=
= 740 K
<u><em>Therefore the final temperature of the gas is 740 K</em></u>
Answer:
The answer to your question is Selenium
Explanation:
The origin of the names of the elements comes from different origins
For example
Sanskrit words. 14 elements have roots from this language
Planets, 4 elements took their names from the planets.
Greek, 42 elements took their names from these languages
The name of Selenium comes from the greek that means moon.
1. False (gravity)
2. True
3. False
4.True
5. False
Hopefully this helps :)
