It is Vitamin D, hope that helps
It has to be D. I know the vapor pressure has to do woth the solvent. that is what the pressure is calculated from
Answer:
Number of moles = 2.8 mol
Explanation:
Given data:
Number of moles of water = ?
Volume of water = 50 mL
Density of water = 1.00 g/cm³
Solution:
1 cm³ = 1 mL
Density = mass/ volume
1.00 g/mL = mass/ 50 mL
Mass = 1.00 g/mL× 50 mL
Mass = 50 g
Number of moles of water:
Number of moles = mass/molar mass
Number of moles = 50 g / 18 g/mol
Number of moles = 2.8 mol
Answer:
2.0 moles
Explanation:
Limiting reagent is the one which is present in small amount. The formation of the product is governed by the limiting reagent.
Given that:-
2.0 moles of A (with an excess of B) can make a maximum of 2.0 moles of C 3.0 moles of B (with an excess of A) can make a maximum of 4.0 moles of C
Thus,
Moles of C = moles of A = (4/3) moles of B
The balanced reaction may be:-
Given, moles of A = 2.0 moles
Moles of B = 3.0 moles
4 mole of A react with 3 moles of B
1 mole of A react with 3/4 moles of B
2 moles of A react with (3/4)*2 moles of B
Moles of B = 2.5 moles
Available moles of B = 3.0 moles
B is in excess. Thus, A is the limiting reagent.
4 mole of A produces 4 mole of C
Thus, C produced from 2 moles of A = 2.0 moles
<h2>Answer:</h2>
The correct answer is option C which is, "Electrons in the orbit closest to the nucleus have the least amount of energy".
<h3>
Explanation:</h3>
- There are different orbitals around the nucleus on which the electrons moves around the nucleus.
- These orbitals have a specific energy, due to which they are known as energy levels.
- The energy level near to the nucleus has least amount of the energy and the energy of the orbitals increase as the distance of the orbitals increase to the nucleus.