As you have not provided the options, still we can figure out the answer by understanding the key difference between saturated and unsaturated hydrocarbons.
SATURATED HYDROCARBONS are those hydrocarbons which only consist of a carbon carbon single bonds. All the bonds are sigma there are no pi bonds at all. Examples are shown below.
While, UNSATURATED HYDROCARBONS are those hydrocarbons which may contain either a double bond or triple bonds or both of them between the carbon atoms as shown below.
A saturated hydrocarbon has only single bonds, like methane (CH4), while an unsaturated hydrocarbon contains double or triple bonds, like ethene (C2H4).
To categorize a hydrocarbon as saturated or unsaturated, we need to look at the types of bonds it has. A saturated hydrocarbon, such as alkanes, has only single bonds between carbon atoms. For example, methane is a saturated hydrocarbon because it's formula, CH4, indicates only single bonds. On the other hand, an unsaturated hydrocarbon, such as alkenes and alkynes, contains double or triple bonds. An example of an unsaturated hydrocarbon is ethene (C2H4), an alkene which consists of a double bond between the two carbon atoms.
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Answer:
Melting point of aqueous solution = -10.32 °C
Explanation:
Where,
ΔT_f = Depression in freezing point
k_f = molal depression constant
m = molality
Formula for the calculation of molality is as follows:
density of water = 1 g/mL
density = mass/volume
Therefore,
mass = density × volume
volume = 3 L = 3000 mL
Mass of water = 1 g/mL × 3000 mL
= 3000 g
van't Hoff factor (i) for MgCl2 = 3
Substitute the values in the equation (1) to calculate depression in freezing point as follows:
Melting point of aqueous solution = 0 °C - 10.32 °C
= -10.32 °C
Answer:
The melting point of the solution is - 1.953 °C
Explanation:
In an ideal solution, the freezing point depression is computed as follows:
where:
is the freezing-point depression
is the cryoscopic constant, in this case is equal to 1.86
b is the molality of the solution
i is the van't Hoff factor, number of ion particles per individual molecule of solute, in this case is equal to 3
Molality is defined as follows:
b = moles of solute/kg of solvent
Moles of solute is calculated as follows:
moles of solute = mass of solute/molecular weight of solute
In this case there are 100 g of solute and its molecular weight is 35.5*2 + 24 = 95 g/mole. So, the moles are:
moles of solute = 100 g/(95 g/mol) = 1.05 moles
The mass of solvent is computed as follows:
mass of solvent = density of solvent * Volume of solvent
Replacing with the data of the problem we get:
mass of solvent = 1 kg/L*3 L = 3 kg
Finally, the molality of the solution is:
b = 1.05/3 = 0.35 mol/kg
Then, the freezing-point depression is:
The freezing-point depression is the difference between the melting point of the pure solvent (here water) and the melting point of the solution. We know that the the melting point of water is 0 °C, then:
melting point of water - melting point of the solution = 1.953 °C
melting point of the solution = 0 °C - 1.953 °C = - 1.953 °C
b. neutral.
c. weakly basic.
d. strongly basic.
A solution with a pH of 8.0 is weakly basic. Thus ,the correct option is C.
The pH scale gives the measure of the acidity or basicity of a solution. It ranges from 0 to 14, where a pH of 7 is considered neutral. Solutions which have a pH less than 7 are acidic, while solutions which have a pH greater than 7 are basic.
In this case, since the pH is 8.0, which is greater than 7, the solution is basic. However, it is important to note that the basicity of the solution is weak, as it is only slightly above neutral.
For example, think of a pH of 8.0 as being similar to water from a freshwater lake. It's not strongly basic like bleach or ammonia, but it still has a slightly basic nature compared to a neutral solution.
Thus, the correct option is C.
Learn more about pH,here:
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Volume: ? L
B. calcium
C. rhodium
D. chlorine
Answer:
Calcium
Explanation:
Calcium is needed in our body to make bones (skeletal system) and teeth strong. Apart from making bones and teeth strong, it is required in other body functions such as:
Enabling blood to clot
Helping in muscle contraction
Helping heart muscle in maintaining normal heart beat
About 99% of calcium present in the body is stored in bones. Calcium is stored in bones in the form of calcium phosphate.
Bones continuously replace old calcium with new one. Calcium is not produced in our body. It comes from daily diet, therefore, it essential to take calcium rich diet.