Which properties describe water? strong surface tension, weak surface tension, denser as a solid, denser as a liquid, nonpolar,
1 answer:
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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:
When magnesium metal burns is heated i the air it forms magnesium oxide.The balanced chemical reaction is given as:
2 moles of magnesium metal when reacts with 1 moles of oxygen it gives 2 moles of magnesium oxide which is white in color.
Some times along with formation of magnesium oxide small amount of magnesium nitride also produced due to which magnesium oxide appears grey in color .The balanced chemical reaction is given as:
3 moles of magnesium combines with 1 mol of nitrogen gas to to give 1 mol of magnesium nitride.