Answer:
3-methylenehexane
Explanation:
In this case, we have <u>two clues</u>.
<u>1) The hydrogenation reaction</u>
<u>2) The ozonolysis reaction</u>
See figure 1.
With this in mind, lets analyze each clue. In the first reaction, we know that only 1 molecule of is added to the unknown molecule. This indicates that we only have <u>1 double bond</u> in the molecule. Now, the next question is <u>where is placed the double bond?</u>
To answer this question, we have to use the second clue. In the ozonolysis reaction, a double bond is broken and is replaced with a carbonyl group. If, <u>formaldehyde</u> is formed the double bond is formed with a <u>primary carbon</u>. The primary carbons in the structure (given in the first reaction: 3-methylhexane) are carbons 1, 6, and 7. So, the double bond can be placed between carbons:
a) 6 and 5
b) 7 and 3
c) 1 and 2
To decide which one is the position of the double bond we have to keep in mind the <u>second product</u> of the ozonolysis reaction a <u>ketone</u>. With this in mind, the carbon bonded to the <u>primary one</u> (deduced by the formaldehyde) it has to be a <u>tertiary carbon</u>. The only option that has a primary carbon bonded to tertiary carbon is <u>b)</u>. (See figure 2)
Finally, with this in mind the structure is <u>3-methylenehexane</u>. To be sure, we can <u>check the formula</u> for the compound, and the <u>reactions</u>. (See figure 3)
I hope it helps!
Answer:
Pressure difference = 16.9 torr
Explanation:
The formula to be used since their is a difference in water level in the beaker and burette is;
Atmospheric pressure = pressure of gas in burette + pressure of water
Atmospheric pressure - gas pressure = pressure of water
Therefore, the difference between atmospheric pressure and gas pressure can be seen to be the pressure of the water
The pressure of water in mmHg = 23 cm H20 = 230 mmH2O
To convert to mmHg, we have to divide by 13.6 since mercury is 13.6 times heavier than water.
Pressure of water = 230 mmH2O * (1 mmHg/13.6 mmH20) = 16.9 mmHg
Since I mmHg = 1 torr, therefore,
Pressure difference = 16.9 torr
Answer:
The value of the missing equilibrium constant ( of the first equation) is 1.72
Explanation:
First equation: 2A + B ↔ A2B Kc = TO BE DETERMINED
⇒ The equilibrium expression for this equation is written as: [A2B]/[A]²[B]
Second equation: A2B + B ↔ A2B2 Kc= 16.4
⇒ The equilibrium expression is written as: [A2B2]/[A2B][B]
Third equation: 2A + 2B ↔ A2B2 Kc = 28.2
⇒ The equilibrium expression is written as: [A2B2]/ [A]²[B]²
If we add the first to the second equation
2A + B + B ↔ A2B2 the equilibrium constant Kc will be X(16.4)
But the sum of these 2 equations, is the same as the third equation ( 2A + 2B ↔ A2B2) with Kc = 28.2
So this means: 28.2 = X(16.4)
or X = 28.2/16.4
X = 1.72
with X = Kc of the first equation
The value of the missing equilibrium constant ( of the first equation) is 1.72
Answer: D: plutonium-239
Explanation: Got it right on the quiz
Answer:
a) 1.8 kJ
Explanation:
ΔG=-RtLnK
Just input the data into the equation to gives us the result, in Joules.
ΔG=-8.314*(25+273.15)*ln(0.48)
ΔG=1819,37 J
But there is only 2 significant figures, so we express it as or 1.8 kJ