Answer: 26.8 kJ of energy is needed to vaporize 75.0 g of diethyl ether
Explanation:
First we have to calculate the moles of diethyl ether
As, 1 mole of diethyl ether require heat = 26.5 kJ
So, 1.01 moles of diethyl ether require heat = 
Thus 26.8 kJ of energy is needed to vaporize 75.0 g of diethyl ether
The parameter pH is a measure of the substance's acidity or basicity. It is quantitatively equal to the negative logarithm of the concentration of H+ ions. So, the lower the pH, the more acidic the substance, Otherwise, the higher the pH the more basic the substance. The pH range runs from 1 to 14, with 7 being neutral.
So, if we are asked to distinguish which of those have the lowest pH, we have to know the moles of H+ ions. Since all of them have a concentration of 0.1 M, concentration is not a factor. Thus, we just have to identify the strongest acid among the list. That is easy to answer because you only have to remember 7 strong acid occurring in nature: HCl, H₂SO₄, HNO₃, HClO₄, HClO₃, HBr, and HI. Since only HNO₃ is included in the list among the choices, the answer would be letter D.
Answer:
1031.85 grams
Explanation:
Further explanation
https://socratic.org/questions/how-many-grams-are-there-in-4-50-moles-of-ba-no-2-2#:~:text=Therefore%2C%20there%20are%201031.85%20grams,(NO2)2%20.
NO
The speed/.velocity will be decreasing
Explanation:
Acceleration is defined by the following equation;
a = delta-V / delta-T
Whereby;
A = acceleration
Delta-V= change in Velocity
T = change in Time
In ouer case we are sure that the value of a is negative because acceleration is decreasing. On the other hand, change in time is positive in our case because time is increasing (i.e moving forward)
Therefore to achieve a negative a (i.e -a), the delta-V must be negative;
Delta-v = V (final) – V (initial)
For a negative delta-V to be achieved, then the final velocity must be lower than the initial velocity
Learn More:
For more on acceleration equations check out;
brainly.com/question/1852158
brainly.com/question/12904893
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