If the following three values were utilized to perform a calculation involving multiplication, the answer should be given to what number of significant figures?
A NaOH (aq) solution and an acid-base indicator are used to determine the molarity of an HCl (aq) solution. A 25.0-milliliter sample of the HCI
(aq) is exactly neutralized by 15.0 milliliters of 0.200 M NaOH(aq).

How is the composition of a meteorite relevant to finding out the composition of earth's core?

Elements that do not have full outer electron shells will donate, share, or take electrons from other atoms. choose the items that have the correct binary ionic formula.

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.