Since there is no "new" chemicals made during this process, it is considered a physical change. Distillation is a process of separating dissolved solids or liquids with different boiling points without chemically changing anything.
Color change, formation if a new substance or altering molecular structure are all general signs of chemical change.
Therefore, the last answer choice looks like the best answer.
Hope that helps!
Answer:
a negative ion, and an isotope.
Explanation:
The perfect atom consists of an equal balance in all 3. If the neutrons are not even with the protons, it is an isotope since it is like another version of the so called (but not actually) 'perfect' atom. If there is more electrons, the charge is negative, making it an ion.
Answer:
coal and oil come from the remains of dead animals.
1. Heat always flow from a region of higher temperature
to a lower temperature, just like concentration gradient. So in this case,
since the metallic sphere is hotter than water, so naturally heat energy flows
from the metallic sphere to the water.
2. We use the formula:
Q = m C ∆T
where Q is the heat energy gained, m is mass of water, C
is heat capacity of water = 4.184 J/g°C and ΔT is change in temperature
Since density of water is 1 g/mL, so mass is also 100g,
therefore:
Q = 100 g * 4.184 J/g°C * (27.1°C - 25°C)
Q = 878.64 J
3. Heat gained by the water is equal to the heat lost by
the metal, therefore:
Q(water) = - Q(metal)
878.64 J = - 15 g * C * (27.1°C - 98°C)
C = 0.83 J/g°C
<span>Copper sulfate, CuSO4 ===> (Cu^2+) (SO4^2-). </span>
<span>That means copper ions have a positive charge in the solution of this compound and are therefore attracted to the negative electrode, cathode. Just wanted to clear that out because "it accepts electrons there" is an invalid and ambiguous answer. </span>
<span>Good luck.</span>