Answer:
all of the above
Explanation:
i got the answer right on cK-12
An independent variable<span> is the </span>variable<span> that is changed or controlled in a scientific </span>experiment<span> to test the effects on the </span>dependent variable<span>. </span>
Answer:
Solar eclipse
Explanation:
A solar eclipse occurs when a portion of the Earth is engulfed in a shadow cast by the Moon which fully or partially blocks sunlight. This occurs when the Sun, Moon and Earth are aligned. Such alignment coincides with a new moon indicating the Moon
To make a first step you have to know the balanced form for neutralization formula:

According to this, you can <span>calculate what you are being asked :</span>

Then we have :

Hope everything is clear, here is the exact answer you need :