Sir isaac newton lived in the 1600’s. his laws of motion and gravity were written many years ago. which of the following is true? a. newton’s laws are too old to be usable. b. newton’s laws have been disproved by modern scientists. c. newton’s laws still apply today. d. new information has made newton’s laws outdated.

The scheme below is from a series of reactions that are part of a synthesis of vitamin a. answer the following questions with reference to this scheme. (i) what is "reagent a"? (ii) draw a step-by-step mechanism which explains the formation of compound c from compound b (iii) which reagents would you use to form compound e from compounds c and d (reagents b and c)? for each reagent suggested above in (ii) explain the role of the reagent in the reaction to (iv) form compound e. you may wish to do this by drawing a mechanism. 1. addition of reagent a но reagent a 2. н,о" thо oh нон-с compound a. compound b. compound c .ch-оh 1. reagent b "сно 2. reagent c сh oh compound e. compound d.

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

Analyze the reaction to determine whether the reaction is exothermic or endothermic. explain your reasoning.