Answer:
trans-1,3-pentadiene is more stable than 1,4-pentadiene due to presence of a conjugated double bond.
Explanation:
Here, 
H(hydrogenated pdt.) is same for both 1,4-pentadiene and 1,3-pentadiene as they both produce pentane after hydrogenation
H(diene) depends on stability of diene.
More stable a diene, lesser will be it's H(diene) value (more neagtive).
trans-1,3-pentadiene is more stable than 1,4-pentadiene due to presence of a conjugated double bond.
Hence, 
is higher (less negative) for trans-1,3-pentadiene
The Mass of ice is 69.12g.
What is mass?
It is a dimensionless quantity that expresses a particle or object's mass. The accepted unit of mass under the International System (SI) is the kilogram.
What is temperature?
Temperature is a measure of the average kinetic energy of the particles inside an object. The temperature increases cause these particles to move more quickly. It is possible to measure temperature using a thermometer or a calorimeter.
first calculate the amount of heat as follows;
q= mass of water C= (0°C-55°C)
=100.0g (4.186J/g°c) (-55°C)
=-23023J
Heat lost by water is gained by ice,
-q=m*ΔH
-23023J= m*333J/g
= 69.12g
Therefore, Mass of ice is 69.12g.
Learn more about mass from the given link.
brainly.com/question/338808
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A meander, in general, is a bend in a sinuous watercourse or river. A meander forms when moving water in a stream erodes the outer banks and widens its valley, and the inner part of the river has less energy and deposits silt.
<h3><u>Answer;</u></h3>
0.180 moles of HgO
<h3><u>Explanation;</u></h3>
The atomic weight of mercury is 200.5
The atomic weight of oxygen is 16.0
Therefore; the molecular weight (per mole) of mercury oxide is 216.5 g
Hence;
Number of moles = 39 g/(216.5 g/mole)
= 0.180 moles of HgO.
A spontaneous oxidation-reduction reaction
