Answer:
The system gains 126100 J
Explanation:
The heat can be calculated by the equation:
Q = nxCxΔT, where Q is the heat, C is the heat capacity,n is the number of moles and ΔT is the variation of temperature (final - initial). The number of moles is the mass divided by the molar mass, so:
n = 250/4 = 62.5 mol.
The system must be in thermal equilibrium with the surroundings, so if the temperature of the surroundings decreased 97 K, the temperature of the system increased by 97 K, so ΔT = 97 K
Q = 62.5x20.8x97
Q = 126100 J
Answer:
The activation energy of the reaction is 1.152 kJ/mol.
Explanation:
Activation energy is the minimum amount which is absorbed by the reactant molecules to undergo chemical reaction.
Initial temperature of reaction = 
Final temperature of reaction = 
Initial rate of the reaction at 100 k = 
Final rate of the reaction at 200 k = 
Activation energy is calculated from the formula:
R = Universal gas constant = 8.314 J/ K mol
Answer:
a. the electrons shared between the oxygen and hydrogen atoms spend more time around the oxygen atom nucleus than around the hydrogen atom nucleus.
Explanation:
Water molecule is a polar molecule , and hence , the atom can attain the respective partial positive and negative charge on them .
The difference in the electronegativity gives rise to the partial positive and negative charge .
Since , oxygen atom is more electronegative in comparison to hydrogen atom , and hence , slightly pulls the electrons towards itself , and attains partial negative charge , and correspondingly , the hydrogen atom attains partial positive charge .
Hence , from the question ,
The correct option is a.
Answer:
Hydrosphere
Explanation:
The biosphere simply refers to the zone of life found on earth. It refers to the portion of the earth inhabited by living things.
The biosphere is divided into three, namely; hydrosphere, atmosphere and lithosphere.
The atmosphere is simply the layer composed of air, the lithosphere is the solid part of the earth while the hydrosphere is the part composed of water.
Since jelly fish is an aquatic animal, it will certainly inhabit the hydrosphere. Hence the answer above.
Answer:
a. continent
Explanation:
The major landmasses on the surface of the Earth made out of crustal rock are called continents. The continents are massive land masses. They lie on top of continental tectonic plates which are less dense and higher than the oceanic tectonic plates. In the present there are six continental masses, all with different shape and size. The continental masses that exist in the present are Eurasia, Africa, North America, South America, Australia, and Antarctica.
