Which of the following are major influences on weather and climate? I. the cycling of water in and out of the atmosphere II. the
2 answers:
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<u>Answer:</u> The correct answer is Option B.
<u>Explanation:</u>
To calculate the molarity of solution, we use the equation:
.......(1)
- <u>For A:</u>
Molarity of calcium phosphate solution = 0.100 M
Volume of solution = 2.00 L
Putting values in equation 1, we get:
Moles of calcium phosphate = 0.200 moles
- <u>For B:</u>
1 mole of calcium phosphate contains 3 moles of calcium atoms, 2 moles of phosphate atoms and 8 moles of oxygen atoms.
So, 0.200 moles of calcium phosphate will contain = moles of oxygen atoms.
Moles of oxygen atoms = 1.6 moles
- <u>For C:</u>
Molarity of calcium phosphate solution = 0.100 M
Volume of solution = 1.00 L
Putting values in equation 1, we get:
Moles of calcium ions = moles
- <u>For D:</u>
Molarity of calcium phosphate solution = 0.100 M
Volume of solution = 5.00 L
Putting values in equation 1, we get:
Moles of phosphorus atoms = moles
According to mole concept:
1 mole of a compound contains number of atoms
Number of phosphorus atoms in 0.500 moles of calcium phosphate will be =
- <u>For E:</u>
1 mole of calcium phosphate contains 3 moles of calcium ions and 2 moles of phosphate ions.
So, 0.200 moles of calcium phosphate will contain = moles of calcium ions
Moles of calcium ions = 0.600 moles
Hence, the correct answer is Option B.
Explanation:
In chemistry, a mole is the base unit of the amount of substance in a system containing elementary entities (atoms, molecules, ions, electrons), and one mole of substance corresponds to the Avogadro's constant or entities. The stoichiometry equation that relates the amount of substance into the measurement in moles is
,
where is the number of moles,
is the amount of substance and
is the Avogadro's constant.
Therefore,
.