Mary finds that she regularly retains water at a certain point in the menstrual cycle. What is chemically similar to aldosterone

Your question seems to me imprecise or poorly written, but compared to what is written I can clarify the following:

In our body we have a blood pressure regulating system through blood volume (which retains less or more fluid to increase or decrease blood volume and consequently blood pressure). This system is called renin-angiotensin-aldosterone what which participates the kidney, lung and capillaries with its own barometric receptors, is an incredible system within the body, which by increasing aldosterone promotes a retention of fluid at the level of the renal glomerulus (kidney) to maintain the blood pressure of the vessels and thus increase it.

Explanation:

It may happen to Mary that this system is activated in a menstrual situation since it may be that she loses too much liquid or blood volume through her menstruation and the body seeks to reward it along with other iron mechanisms for the transitory anemias that menstruation generates (that is this reason that it is not recommended to do blood tests in menstrual stages)

1.consider the following balanced equation and answer parts a through. show calculations for each part.  

3 ag(s) + 4 hno3(aq) → 3 agno3(aq) + no(g) + 2 h2o(l)  

a. calculate the number of moles of agno3 produced by the reaction of 3 moles of ag with excess hno3. if the number to the left of the compound represents the number of moles of the compound which are present, then 3 moles of ag react with 4 moles hno3 to produce 3 moles agno3 (aq).

so the answer to a would be 3 moles.

b. calculate the number of moles of agno3 produced by the reaction of 108 grams of ag with excess hno3.  

i'm not sure how to plug in the grams of silver into an equation using moles to find how many moles are produced.

c. calculate the number of grams of agno3 produced by the reaction of 108 grams of ag with excess hno3  

d. calculate the number of moles of no produced as a byproduct of the reaction of 108 grams of ag with excess hno3.  

e. calculate the number of grams of no produced as a byproduct starting with 108 grams of ag and excess hno3.  

explanation:

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.