In what order do the sun ,moon , and earth need to be in to cause a solar eclipse

a. the sun is between earth and the moon
b. earth is between the sun and the moon
c. the moon is to the side of the earth and the sun
d. the moon is between earth and the sun

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

Aroom with dimensions 7.00m×8.00m×2.50m is to be filled with pure oxygen at 22.0∘c and 1.00 atm. the molar mass of oxygen is 32.0 g/mol. how many moles noxygen of oxygen are required to fill the room? what is the mass moxygen of this oxygen?

How might this scientific phenomena be explained? a paper clip floats on water.