Answer:
-4.1°C
Explanation:
The freezing-point depression (ΔTf) is a colligative property that can be calculated using the following expression:
ΔTf = i × Kf × m
where,
i: van't Hoff factor
Kf: freezing-point depression constant
m: molality
ΔTf = 1.9 × 1.86°C/m × 1.15 m = 4.1 °C
The freezing-point of pure water is 0°C. The freezing-point of this solution is:
0°C - 4.1°C = -4.1°C
Answer:
n = 0.207 mole
Explanation:
We have,
P = 1 atm
V = 5 liter
R = 0.0821 L.atm/mol.K
T = 293 K
We need to find the value of n. The relation is as follows :
PV = nRT
Solving for n,

So, the value of n is 0.207 mol.
<u>Methylcyclohexane:</u>
The chemical formula of the organic compound, methylcyclohexane is
. It is branched into the group of saturated hydrocarbon.
Note: Refer the attached image for the structure of methylcyclohexane
<u>Structure of methylcyclohexane:</u>
- It is a monosubstituted cyclohexane because it has one branching through the attachment of single methyl group on one carbon of the cyclohexane ring.
- Being very toxic to the aquatic ecosystem, the methyl group of this compond in its axial position experiences a steric strain or steric crowding.
Answer:
<u>Metalloid -</u>
A metalloid is a chemical element with properties intermediate between those of typical metals and nonmetals
<u>Alloy</u> -
An alloy is a mixture of metals or a mixture of a metal and another element. Alloys are defined by a metallic bonding character.