250 200
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Attempt due: Oct 10 at 11:59pm
12 Minutes, 9 Seconds
A
150
Temperature (Celsius)
100
B
D
50
SE
0
0
20
40
120
140
160
60 80 100
Time (min)
ry
The diagram above is the cooling curve of a certain chemical X
(molar mass=50 g/mol) with a mass of 100 grams. Based on the
data below, how much heat, in kJ, is released by this substance
during stage E?
]
ledia
(one decimal places for your answer)
otices
?
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specific heat of X(g): 0.89 J/g °C
specific heat of X(1): 1.4 J/g °C
specific heat of X(s): 2.6 J/g °C
enthalpy of melting: 4.6 kJ/mol
enthalpy of boiling: 24 kJ/mol

space exploration has led to the development and technological improvement of many everyday items. (if this answer is wrong i will find the right answer) : )

hydrocarbons are organic compounds that contain only hydrogens and carbons. they can be saturated (those which contain only carbon-carbon single bonds) or unsaturated (those which contain carbon-carbon double or triple bonds) in nature. hydrocarbons can undergo several reactions like substitution, elimination etc.  

on substituting one or more hydrogen atoms in hydrocarbon it results in the formation of haloalkane. as the halogen atoms are large compared to the carbon and hydrogen atoms, due to which the molecular weight increases and the bond become polar because of presence electronegative halogen atom and results in the increase in boiling point of the haloalkane.

thus, the correct option is (b) that is the boiling point of the new compound increases on substituting a hydrogen atom with a halogen in a hydrocarbon.

un recipient conține 6,4 moli de gaz. gazul hidrogen reprezintă 25% din totalul kilometrilor din container. în cazul în care presiunea totală este de 1.24 atm ceea ce este