<u>Answer:</u> The correct option is C) 1.68 mol/L
<u>Explanation:</u>
Molarity is defined as the amount of solute expressed in the number of moles present per liter of solution. The units of molarity are mol/L. The formula used to calculate molarity:
.....(1)
Given values:
Given mass of
= 150 g
Molar mass of
= 180 g/mol
Volume of the solution = 0.50 L
Putting values in equation 1, we get:
![\text{Molarity of solution}=\frac{150}{180\times 0.50}\\\\\text{Molarity of solution}=1.68M](https://tex.z-dn.net/?f=%5Ctext%7BMolarity%20of%20solution%7D%3D%5Cfrac%7B150%7D%7B180%5Ctimes%200.50%7D%5C%5C%5C%5C%5Ctext%7BMolarity%20of%20solution%7D%3D1.68M)
Hence, the correct option is C) 1.68 mol/L
I believe this question has the following five choices to
choose from:
>an SN2 reaction has occurred with inversion of
configuration
>racemization followed by an S N 2 attack
>an SN1 reaction has taken over resulting in inversion
of configuration
>an SN1 reaction has occurred due to carbocation
formation
>an SN1 reaction followed by an S N 2 “backside”
attack
The correct answer is:
an SN1 reaction has occurred due to carbocation formation
Answer:
Liquid: 38.7 g x 1 ml/0.865 g = ml of liquid
Vol of solid = 80.0 ml - ml of liquid
mass of solid = vol of solid x 2.75 g/ml
(100. g)
Explanation:
you can use this as a eg for this question
<u>Answer:</u> The order of increasing boiling points follows:
![\text{Ethanol }](https://tex.z-dn.net/?f=%5Ctext%7BEthanol%20%7D%3CMg%28NO_3%29_2%3C%5Ctext%7B%20NaCl%7D)
<u>Explanation:</u>
The expression of elevation in boiling point is given as:
![\Delta T_b=i\times k_b\times m](https://tex.z-dn.net/?f=%5CDelta%20T_b%3Di%5Ctimes%20k_b%5Ctimes%20m)
where,
= Elevation in boiling point
i = Van't Hoff factor
= change in boiling point
= boiling point constant
m = molality
For the given options:
- <u>Option 1:</u> 0.050 m
![Mg(NO_3)_2](https://tex.z-dn.net/?f=Mg%28NO_3%29_2)
Value of i = 3
So, molal concentration will be = ![(0.05)\times 3=0.15m](https://tex.z-dn.net/?f=%280.05%29%5Ctimes%203%3D0.15m)
- <u>Option 2:</u> 0.100 m ethanol
Value of i = 1 (for non-electrolytes)
So, molal concentration will be = ![(0.100)\times 1=0.100m](https://tex.z-dn.net/?f=%280.100%29%5Ctimes%201%3D0.100m)
- <u>Option 3:</u> 0.090 m NaCl
Value of i = 2
So, molal concentration will be = ![(0.09)\times 2=0.18m](https://tex.z-dn.net/?f=%280.09%29%5Ctimes%202%3D0.18m)
As, the molal concentration of NaCl is the highest, so its boiling point will be the highest.
Thus, the order of increasing boiling points follows:
![\text{Ethanol }](https://tex.z-dn.net/?f=%5Ctext%7BEthanol%20%7D%3CMg%28NO_3%29_2%3C%5Ctext%7B%20NaCl%7D)
Answer:
Weight is the measure of the force of gravity on an object. The mass of an object will never change, but the weight of an item can change based on its location. For example, you may weigh 100 pounds on Earth, but in outer space you would be weightless.
Explanation:
I can't see the options but I hope this helps!