Which of the following shows the correct quantum numbers (n; ℓ; mℓ) and electron configuration for the highest energy electron(s) in the given atoms? 1. rb: [kr]5s 1 ; n = 5; ℓ = 0; mℓ = 0, 1 2. n: [he]2s 2 2p 3 ; n = 2; ℓ = 2; mℓ = −2, −1, 0, 1, 2 3. fe: [ar]4s 2 3d 6 ; n = 4; ℓ = 0; mℓ = 0 4. ca: [ar]4s 2 ; n = 4; ℓ = 1; mℓ = −1, 0+1 5. co: [ar]4s 2 3d7 ; n = 3; ℓ = 2; mℓ = −2, −1, 0, 1, 2

Co: [Ar]4s 2 3d7 ; n = 3; ℓ = 2; mℓ = −2, −1, 0, 1, 2

Explanation:

Hello,

Quantum numbers for the highest energy level of cobalt are correct, because n matches with the considered sub-orbital 3, l matches with the d region that has a value of 2 based on the rule: if region=s, l=0; if region=p, l=1;if region=d, l=2 and if region=f, l=3 and the ml goes from -2 to 2 including zero by taking into account the l quantum number. The rest of the options are wrong since the quantum numbers don't match with the corresponding orbitals.

Best regards.

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: