Answer:
Explanation:
element - a basic substance that can't be simplified (hydrogen, oxygen, gold, etc...) molecule - two or more atoms that are chemically joined together (H2, O2, H2O, C6H12O6, etc...) compound - a substance that contains more than one element (H2O, C6H12O6, etc...)
Answer:
B - End to end overlap of p overlap
Explanation:
Sigma bonds (σ bonds) are the strongest type of covalent chemical bondSigma bonds are formed by end-to-end overlapping. Sigma bonds can occur between any kind of atomic orbitals;The combination of overlapping orbitals can be s-s, s-pz or pz-pz.
Answer is Iron.
Explanation:
The atomic number of Iron (Fe) is 26. SO the Electronic configuration is,
Fe = 1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d⁶
When Iron looses three electrons its electronic configuration becomes,
Fe³⁺ = 1s², 2s², 2p⁶, 3s², 3p⁶, 3d⁵
Result:
After loosing three electrons the d-shell get 5 electrons (Half-Filled D-Orbital) which is stable, Hence due to this stability Iron tends to attain +3 charge.
Answer: three very important kinds of things: coal, oil, and natural gas.
Explanation:
Answer:
pressure of the gas in kPa = 133.75 Kpa
Explanation:
Given:
- Number of moles = 0.5
- Temperature of gas = -15.5°C = 257.6K
- Volume of gas = 8 litre
- R (universal gas constant) = 0.082 L.atm/K.mol
To find:
Pressure of gas in KPa = ?
Solution:
From ideal gas equation,
<em><u>PV = nRT </u></em>
P × 8 L = 0.5 mol × 0.082 L.atm/K.mol × 257.6 K
P = 1.32 Atm
We know that <em><u>1 atm = 101.32 K Pa</u></em>
1.32 Atm = 1.32×101.32 Kpa = 133.75 Kpa
P = 133.75 Kpa
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