Answer:
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Explanation:
B. Physical changes always involve the formation of a gas while chemical changes may not.
C. Physical changes can occur inside or outside the substance; chemical changes always occur outside.
D. Physical changes involve a change of state; chemical changes involve a change of shape.
Answer:
A is the answer.
Explanation:
Physical changes do not change the substance's composition but just the outside qualities. However, chemical changes change the composition of the substance and it's chemical properties.
Answer:
A
Explanation:
The location of earth in the solar system is found between Venus and Mars.
A solar system is the gravitational bound system comprising the sun and the objects aligned in the orbit revolving around the sun. The foundation of the solar system is mediated billions of years ago with the huge interstellar cloud collapse.
The planets are present in the orbit bounded by the gravitational force of the sun and revolve around it. Earth is the planet that is said to have only one having the five elements that support life namely. fire, air, water, soil, and space.
The solar system is comprised of 9 planets with the nearest to the sun being mercury, and the farthest being Pluto. Earth is arranged as the third planet from the distance from the sun and is located between Venus and Mars.
Learn more about solar system, here:
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Answer:
The specific heat capacity of the metal is 1.143 J/g°C
Explanation:
A typical excersise of calorimetry:
Q = m . C . ΔT
ΔT = Final T° - Initial T°
m = mass
In this case, the heat released by the metal is gained by the water to rise its temperature.
Qmetal = Qwater
(We consider that metal was at the same T° of water)
22.5 g . C . (65°C - 25.55°C) = 25 g . 4.184 J/g°C . (35.25°C - 25.55°C)
22.5 g . C . 39.45°C = 25g . 4.184 J/g°C . 9.7°C
887.625 g.°C . C = 1014.62J
C = 1014.62J / 887.625 g.°C
C = 1.143 J/g°C
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