D. 2,3,4-trimethylpentane
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Answer:
A = 2s²
B = 2p⁴
or 2s² 2p⁴
Explanation:
Oxygen:
It is the eighth element of periodic table. It is present in group sixteen and second period of periodic table. It has six valance electrons. It is also called chalcogen because it is ore forming element. its atomic number is 8.
Electronic configuration:
O₈ = 1s² 2s² 2p⁴
The two electrons in 1s shell represent the core electrons while the six electrons in second shell are valance electrons.
Valance shell electronic configuration :
2s² 2p⁴
AWNSER: 1.0 mol Fe2O3 contains 111.69 g Fe .
Answer:
Explanation:
Since temperature is to be maintained ; constant temperature and a such, the process is ISOTHERMAL
- to calculate mass of then gas = P1V/RT1
- m1 = 10 x 10^5 x 0.3 / 287 x 330
- similarly for m2 = P2V/RT2
- hence required mass = m1 - m2
b) Considering a well-insulated cylinder ;
Cp = 29J/molK
Temperature T2 = T1 [ P1/P2]^(1-γ)/γ
where γ = 1.4
plugging the values into the equation ; T2 = 171k
hence mass of the gas m1 = P1V/RT1
= 10 x 10^5 x 0.3/287 x 171
= 6.11kg
mass of m2 = P2V/RT2
= 10^5 x 0.3/287 x 171
= 0.611kg
hence required mass = m1 - m2
= 5.50kg
