I need help on chemistry, the wording kind of throws be off too.

What is the most important factor in determining climates.

What is the chemical formula for the compound formed between sodium and flour one

Astudent uses universal ph paper to find the ph of three solutions . solution a has a ph of 5 solution b has a ph of 11 and solution c has a ph of 7 identify which solution is acidic which solution is neutral and which solution is basic