When hydrogen is attached to a more electronegative element?

When hydrogen is attached to a more electronegative element, the electronegative atom becomes partially negative and the hydrogen atom becomes partially positive

Explanation:

Electronegativity is the tendency of an atom to draw electrons closer to itself when it is bound to another different chemical element through a covalent bond, that is, where electrons share, considering that molecule as isolated.

Because of electronegativity when a hydrogen atom is covalently bonded to a more electronegative atom, the hydrogen electron is strongly attracted to the other atom, leaving hydrogen partially positive.

Take for example an HCl molecule. The chlorine atom attracts electrons with greater intensity than hydrogen. Therefore, we say that chlorine is more electronegative than hydrogen. This forms an electric dipole (μ), which are two electric monopoles, with electrons tending to be more attracted to chlorine. Then the H ─ Cℓ bond will have a negative partial charge on chlorine (δ-) and a positive partial charge on hydrogen (δ +). So this is a molecule with electronegativity difference and is polar.

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: