Students are studying how the color of a group of beetles changes. Population of Beetles
25
20
Number of Beetles
(thousands)
15
10
0
Time
Which two statements support the explanation that natural selection caused the color change in the beetles?
A. The beetles' surroundings became lighter.
B. Fewer beetles with dark coloration survived to reproduce.
C. The gene that produces dark coloration became more common.
D. Beetles with light coloration found a more nutritious food source.
E. Beetles with dark coloration became better able to hide from predators.

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:

with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence

i think it's letter a.