<span>Some
of the solutions exhibit
colligative properties. These properties depend on the amount of solute
dissolved in a solvent. For boiling point elevation, we calculate the increase in temperature by the equation:
</span><span>ΔT(boiling point) =
(Kb)mi
where Kb is a constant, m is the molality of the solution, i is the van't Hoff factor.
From the given data, we can easily calculate for i as follows:
</span>ΔT(boiling point) = (Kb)mi
103.45 - 100 = (0.512)3.90i
i = 1.73 <-------van't Hoff factor
3-hexene shows geometrical isomers .
The geometrical isomers of 3-hexene are cis-3-hexene and trans-3-hexene.
Trans isomer has a higher melting point than cis isomer . the cis isomer has high boiling point . dipole moment is low in case of trans and high in case of cis .
<h3>What is isomerism ?</h3>
it is a type of phenomena in which two or more compounds have same molecular or chemical formula but have different structure or spatial arrangement in 3D space .
<h3>Isomers :</h3>
same molecular formula but different physical or chemical properties .
<h3>What is geometrical isomers ?</h3>
it is a type of stereoisomers which have same molecular formula and same structure but different arrangement of atoms in space .
Learn more about geometrical isomerism here :
brainly.com/question/9064937
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Answer:
0.0102moles CaCl₂.2H₂O
0.0102moles CaCl₂
Explanation:
To convert moles to grams or vice versa of a compound, it is necessary to find molar mass of this substance.
For the CaCl₂.2H₂O:
This is the calcium chloride dihydrate (Because there are 2 molecules of water). That means you have 1 atom of Ca, 2 atoms of Cl, 4 atoms of H and 2 atoms of C. <em>Molar mass is the algebraic sum of the atomic weights that compose the molecule. </em>
Molar mass:
Ca: 1ₓ40.08g/mol = 40.08g/mol
Cl: 2ₓ35.45g/mol = 70.90g/mol
H: 4ₓ1.01g/mol: 4.04g/mol
O: 2ₓ16g/mol: 32g/mol.
40.08 + 70.90 + 4.04 + 32 = <em>147.02g/mol</em>
By using the molar mass of the susbtance, 1.50g are:
1.50g ₓ (1mol / 147.02g) =
<h3>0.0102moles CaCl₂.2H₂O</h3>
In the 1.50g of CaCl₂.2H₂O you have 0.0102 moles. As you can see, 1 mole of the dihydrate substance contains 1 mole of CaCl₂. Thus, you have:
<h3>0.0102moles CaCl₂</h3><h3 />
I think it’s D. I’m not really shore....