Answer:
A. Changing water from liquid to solid is an example of a physical change
Explanation:
C. At some point, the land masses were connected to each other.
Explanation:
The fossils now exists far away from each other because at some point, the land masses were once connected to each other. Now, the land masses have drifted apart due to plate tectonics.
Alfred Wegener a scientist in 1912 first formulated the theory of continental drift. The theory suggests that present day land masses have moved to their present positions.
- A more refined theory of plate tectonics is now in play today and it provides a better understanding to why we can find similar features across different continents.
- The similar fossils must have formed together when the land masses were once joined together.
- Noe that the land masses are separated, the fossils species are not separated.
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Answer:
for combustion of naphthalene is -5164 kJ/mol
Explanation:

where, C refers heat capacity and
refers change in temperature.
Here, 
So, 
is generally expressed in terms of per mole unit of reactant. Also,
should be negative as it is an exothermic reaction (temperature increases).
Molar mass of naphthalene is 128.17 g/mol
So, 1.025 g of naphthalene =
of naphthalene
= 0.007997 moles of naphthalene

In chemistry, the letter "H" represents the enthalpy of a system. Enthalpy refers to the sum of the internal energy of a system plus the product of the system's pressure and volume. The delta symbol is used to represent change. Therefore, delta H represents the change in enthalpy of a system in a reaction.
Nuclei may be unstable if they have
a too much energy.
b too many protons.
C an unstable ratio of protons to neutrons.
d any of the above.
The answer would be, D any of the above.
Hope this helps