Answer:
Lunar eclipse
Explanation:
When the Earth is in between the Sun and the Moon, Earth blocks the sunlight falling on the moon.
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This answer is C hope this helped
the ion version of potassium is k+
Answer:

Explanation:
Hello there!
In this case, according to the following chemical reaction we found on goo gle as it was not given:

Whereas we can see a 2:4 mole ratio of potassium permanganate product to potassium hydroxide reactant with molar masses of 158.03 g/mol and 54.11 g/mol respectively. In such a way, by developing the following stoichiometric setup, we obtain the mass of KOH to start with:

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Answer: pH of buffer solution is 8.1
Explanation:
The formula for the Henderson–Hasselbalch equation is:
is the concentration of
is the acid dissociation constant,
and
are concentrations of the conjugate base and starting acid.
Putting in the values we get:

Thus pH of buffer solution is 8.1