The correct option is A.
In the convection cell, cold air sinks at the poles because of their high pressure. As the air moves away from the poles along the earth surface, it begins to get warm and its pressure reduces. Convection cells are circular pattern of wind which are caused by the rising and sinking of wind.
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Answer:
CaCl₂.6H₂O
Explanation:
- If we suppose that the compound has a mass of 100.0 g, it will contain 18.29 grams of Ca, 32.37 grams of Cl, and 49.34 grams of water.
- We can convert the grams of each element to moles by dividing the number of grams by the atomic mass of each element.
No. of moles of Ca = (18.29 g) / (40.0 g/mol) = 0.457 mol.
No. of moles of Cl = (32.37 g) / (35.4 g/mol) = 0.914 mol.
No. of moles of H₂O = (49.34 g) / (18.0 g/mol) = 2.74 mol.
- The no. of moles of (Ca: Cl: H₂O) is (0.457 mol: 0.914 mol: 2.74 mol).
- To obtain the ratio of the elements in the compound, we divide over the lowest no. of moles (0.475).
So the mole ratio of (Ca: Cl: H₂O) is (1: 2: 6).
So, the formula of the compound is CaCl₂.6H₂O.
Because their electronic configurations have the same number of electrons in the outermost shell.
Two charged atoms. This is because the atom that loses the electron will become a positively charged ion (a cation) and the one that gains that electron will become a negatively charged ion ( an anion).
