A student went outside every night for eight nights to look at the Moon. The pictures below show how the Moon looked each night. What caused the changes in the appearance of the Moon that the student observed?

Group of answer choices

the revolution of the Moon around the Earth

the rotation of the Earth on its axis

the revolution of the Earth around the Sun

the rotation of the Moon on its axis

I NEED THE ASNWER ASAP I'M IN A RUSH THX :D

Indicate whether the specified alkyl halides will form primarily substitution products, only elimination products, both substitution and elimination products, or no products when they react with sodium methoxide. 1-bromobutane 1-bromo-2-methylpropane 2-bromobutane 2-bromo-2-methylpropane

In pqr m< p=60 m< q= 30 and m

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution. calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.