PLS HELP ME I HAVE TILL 12 A student collects oxygen gas by displacing water in a test tube. The gas in the tube has a total pressure of 92.3kPa. If the water has a vapor
pressure of 1.82kPa, what is the pressure of oxygen?
a 90.5kPa
b 94.1kPa
c 168.0kPa
d 50.7kPa

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.

One nanometer is equal to how many meters?

What is the solubility-product constant of barium sulfate, baso4, if a saturated solution is 1.03 ´ 10-5 m?