6. describe why the earth experiences high and low tides.

The Earth's rotation and the gravitational pull of the sun and moon create tides. Because the moon is much closer to Earth than the sun, the moon exerts a much stronger gravitational pull.

The high tide on the side of the Earth facing the moon is called the high high tide. The high tide caused by the bulge on the opposite side of the Earth is called the low high tide. A low high tide may be understood as the moon's tidal force pulling the planet—not the ocean—toward it.

https://www.nationalgeographic.org/media/earths-tides/

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30litre of li2o is 1.0002mole approximately 1 mole