Please help! Very important and will give brainliest to correct answer! Two gas jars are connected to each other, but they are separated by a closed valve. One gas jar contains oxygen, and the other is empty. What will happen when the valve is opened?

Select one:

a. Oxygen molecules will remain in their original jar because of the very high density of the oxygen molecules.

b. Oxygen molecules will remain in their original jar because there is enough space in the original jar.

c. Oxygen molecules will spread evenly throughout both jars because of weak intermolecular forces.

d. Oxygen molecules will spread through both jars because of the high molecular weight of oxygen.

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 energy is it when you flip on a switch on a lamp

4. a 20-kg child is tossed up into the air by her parent. the child is 2 meters off the ground traveling 5 m/s. circle one: ke / gpe / both show your work for finding the values of each type of energy the object has: