Answer: In the three-dimensional structure of methane, CH₄, the hydrogen atoms attached to a carbon atom are aligned <span>
<u>at the corners of a Tetrahedron</u>.
Explanation: In
Methane (CH</span>₄) the central atom (carbon) is bonded to four hydrogen atoms. So, the central atom is having four electron pairs and all pairs are bonding pairs and lacks any lone pair of electron. According to
Valence Shell Electron Pair Repulsion (VSEPR) Theory the central atom with
four bonding pair electrons and
zero lone pair electrons will attain a
tetrahedral geometry with
bond angles of 109°. Hence, the shape of CH₄ is tetrahedral.
The conversion factor between moles of calcium ion and moles of
in
would be 3 to 1.
<h3>Mole fraction</h3>
if formed from 3 carbon atoms and 3 phosphate atoms according to the equation:

Thus, there are 3 moles of calcium in every 1 mole of
.
The conversion factor between moles of calcium and moles of
will. therefore, be 3 to 1 or simply 3:1.
More on mole fractions can be found here: brainly.com/question/8076655
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I think the answer is A. Physical weathering, because since a debris is added to the landform, it is physically happening.
So it could be used in every country(different languages) yet still understood