Which statement BEST explains why the Moon is visible from the Earth? 1) The Moon reflects light from the Sun.

2) The Moon is always lit up by the Sun for us to see.

3) The Moon reflects light from the Earth.

4) The Moon produces its own light through radiation.

The answer is the ''The moon is always lit up by the sun for us to see.''

Explanation: The moon is directly illuminated by the sun.

The answer to your question is:  yield = 81 %

Explanation:

Data

Calcium oxide mass = 2 g

Calcium hydroxide mass = 2.14 g

yield = ?

Process

Reaction

                     CaO   +   H₂O    ⇒     Ca(OH)₂

MW CaO = 40 + 16 = 56 g

MW Ca(OH)₂ = 40 + 32 + 2 = 74 g

                  56 g of CaO   74 g of Ca(OH)₂

                  2 g                    x

                 x = (2 x 74)/ 56

                 x = 2.64 g of  Ca(OH)₂

yield = experimental / theoretical x 100

yield = 2.14 / 2.64 x 100

yield = 81 %