18.6
use snells law for glass n=sini/sinr
the value of angle of refraction in glass becomes value of angle of incidence in the glass methanol interface
use snells law again to get the angle light makes with methanol.
Water that contains large amounts of disolved salts
<u>Answer:</u> The for the reaction is 15.3 kJ.
<u>Explanation:</u>
Hess’s law of constant heat summation states that the amount of heat absorbed or evolved in a given chemical equation remains the same whether the process occurs in one step or several steps.
According to this law, the chemical equation is treated as ordinary algebraic expressions and can be added or subtracted to yield the required equation. This means that the enthalpy change of the overall reaction is equal to the sum of the enthalpy changes of the intermediate reactions.
The chemical equation for the reaction of carbon and water follows:
The intermediate balanced chemical reaction are:
(1) ( × 2)
(2)
(3)
The expression for enthalpy of the reaction follows:
Putting values in above equation, we get:
Hence, the for the reaction is 15.3 kJ.
Answer:
the water cycle is a system that goes through evaporation then the water goes into the clouds and rains down as preparation
Explanation:
thats the cycle but if I were u I would do more Reasearch
Answer:
The reaction proceeds through the SN-1 mechanism.
Explanation:
Based on the question given, the ratio of elimination to substitution is the same (26% elimination) for 2−bromo−2−methylbutane and 2−iodo−2−methylbutane in 80% ethanol/20% water at 25°C.
The formation of the same ratio of products from different starting materials is only possible when both reactions are proceeding with thesame intermediates.
In SN-1 and E-1 mechanism, reaction proceeds via a carbocation mechanism, whereas in the case of SN-2 mechanism, the nucleophile attacks the back side of the leaving group.
In the case of E-2 mechanism, both the beta and halide leaves at the same time to form an alkene.
Hence, the substitution reaction given in the question proceeds through the carbocation intermediate. This implies that the reaction proceeds through the SN-1 mechanism.