Cerebrum is the part of the brain that we use for imagination, thinking, judgement etc. It is also the largest part of the brain
Cerebellum is in charge of stuff like the spinal cord
and the brain stem is the part of the brain that helps us move. (if you watch the walking dead in one of the episodes it teaches this xD)
hope this helped (:
The question states that we have two separate methyl groups coming off of the main chain. Therefore, if we remove two carbons from the formula C₆H₁₄O, we are left with 4 carbons, suggesting our structure has a 4-carbon main chain, simplified below:
CH₃-CH₂-CH₂-CH₃
We are also told that we have a tertiary alcohol. A tertiary alcohol is when the functional group -OH is attached to a tertiary carbon, which is a carbon containing 3 C-C single bonds. We cannot add the -OH to either end of our 4-carbon chain because the only way to make it a tertiary alcohol would be to add both methyl groups to that same carbon, which would not make them two separate methyl groups. Therefore, the -OH must go on the 2- or 3- carbon in our 4-carbon chain:
CH₃-CH-CH₂-CH₃
|
OH
Now that we have our 4-carbon chain with an -OH on the second carbon, the -OH at this time would only be a secondary alcohol since that carbon only has two C-C single bonds. Therefore, we must add another methyl group to that carbon containing the -OH, and this will make it a tertiary alcohol:
CH₃
|
CH₃-C-CH₂-CH₃
|
OH
We now have 5 carbons in our structure that has a 4-carbon chain with a tertiary alcohol. We added one methyl group to our 4-carbon chain, and must add another methyl group. However, if we add the methyl group to the 1- or 4- carbons at the end of the chain, we will simply extend the chain, but that is not what we want. We need another separate methyl group extending from the original 4-carbon chain. The only place we can put this methyl group is on the 3-carbon. Therefore, the structure we are looking for is:
CH₃
|
CH₃-C--CH-CH₃
| |
OH CH₃
Answer:
70.07 g
Explanation:
Data Given:
Amount of Heat release = 2.20 x 10⁴ J
initial temperature = 100 °C
Final temperature = 25 °C
Cs of water = 4.186 J/g °C
mass of water = ?
Solution:
Formula used
Q = Cs.m.ΔT
rearrange the above equation to calculate the mass of water sample
m = Q / Cs.ΔT .... . . . . . (1)
Where:
Q = amount of heat
As heat is released therefore Q will be negative
Q = -2.20 x 10⁴ J
Cs = specific heat of water = 4.186 J/g °C
m = mass
ΔT = (t2 - t1) = Change in temperature
First we have to find ΔT
ΔT = (t2 - t1)
ΔT = (25 °C - 100°C )
ΔT = -75 °C
Put values in above equation 1
m = - 2.20 x 10⁴ J / 4.186 J/g °C x -75 °C
m = - 2.20 x 10⁴ J / - 313.95 (J/g)
m = 70.07 g
So mass of water = 70.07 g
<span>Photosynthesis Is a Reaction To Make Food</span>