Element yourneighbor (yn) has an atomic mass of 126 amu and has six known isotopes. isotope 1 has a mass
of 120 amu and a relative abundance of 8%. isotope 2 has a mass of 117 amu and a relative abundance of
12 %. isotope 3 has a mass of 130 amu and a relative abundance of 5%. isotope 4 has a mass of 125 amu
and a relative abundance of 30%. if isotopes 5 and 6 have the same relative abundance and isotope 6 has a
mass of 131.4 amu, what is the mass of isotope 5 and the relative abundances of isotopes 5 and 6 ?

The relative abundance of isotopes 5 and 6 are 22.5 each and the mass of isotope 5 is 127.98

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:

the answer is d. 74.02