Is a specific configuration of atoms commonly attached to the carbon skeletons of organic molecules and usually involved in chemical reaction.

The answer is "Functional Group"

Explanation: A Functional Group is the arrangement of atoms that characterizes a family of compounds. Commonly is distinguished by different atoms nearly or rounded a carbon atom. Is like the principal actor in a chemical reaction.

For example:

In the picture we can see an Organic Acid named Acetic Acid (commercially known as vinegar). Its functional group (red circle) is -COOH, that means, this arrangement of atoms is the one that characterizes the carboxilyc acids in organic molecules.

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:

14 days is the half-life of phosphorus-32