Many elements combine with hydrogen(valence = 1) to give compounds called hydrides. Use the position of an element in the period
1 answer:
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Answer: The volume of required is 25.0 ml
Explanation:
According to the neutralization law,
where,
= basicity
= 1
= molarity of
solution = 2.00 M
= volume of
solution = 50.0 ml
= acidity of
= 1
= molarity of
solution = 4.00 M
= volume of
solution = ?
Putting in the values we get:
Therefore, volume of required is 25.0 ml
<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.