Answer:
Mass = 2.222 g
Explanation:
Given data:
Volume of neon gas = 2.56 L
Temperature = 273 K
Pressure = 1 atm
Mass of neon gas = ?
Solution:
PV = nRT
n = PV / RT
n = 1 atm × 2.56 L/ 0.0821 atm. L / mol. K× 273 K
n = 2.56 L.atm / 22.4 atm. L/ mol
n = 0.11 mol
Mass = number of moles × molar mass
Mass = 0.11 mol × 20.2 g/mol
Mass = 2.222 g
Explanation:
B. Plant cells is the correct answer
Two types of chemical composition that characterize minerals are compounds and elements.
Answer:
The element with electron configuration 1s² 2s² 2p⁶ will most likely not react with an element having seven Valence electrons.
The electron configuration of the element in discuss is 1s² 2s² 2p⁶.
The element has enough electrons to fill it's energy level, n = 2 shell.
In essence, the element in discuss is unreactive as it has attained it's octet configuration and as such is neither in need of an electron nor ready to donate an electron.
As such, although an atom having seven Valence electrons is highly electronegative and as such is an electron attractor, the element with the full octet configuration does not react with it.
This unreactive nature of noble gases is attributed to the full octet configuration of noble gases.
P.S: The electron configuration above is the electron configuration of Neon, Ne.
