Ihaven’t had a teacher for my chemistry class and in order for me to pass i need to pass this here final. can someone me? ?

What is the molecular formula of a hydrocarbon with m+ = 166? (write the formula with no subscripts, e.g. c4h10.) what is the sum of rings and double bonds in this compound?

This question is about electrolysis. metal spoons can be coated with silver. this is called electroplating. suggest one reason why spoons are electroplated?

What does the symbol (–hfus) indicate in a phase change?