Most buffers are a mixture of a weak acid and its conjugate base. buffers resist changes in ph when small amounts of acid or base are added. the effective ph range of a buffer depends on the pka of the acid and the relative concentrations of the acid, ha, and its conjugate base, a−. the equation for the acid dissociation of a weak acid is: ha(aq) + h2o(l) ⇌ a−(aq) + h3o+(aq) the equation for the acid dissociation constant is: ka equals concentration of h3o+ times concentration of a− divided by concentration of ha rearrange the equation and then substitute in pka = −log(ka) and ph = −log(h3o+): ph equals pka plus log of the result of the concentration of a− divided by concentration of ha this expression is the henderson-hasselbalch equation and is useful for determining the ph of a buffer solution. a buffer solution has 0.620 m hf and 0.710 m f−. if 0.025 moles of hcl is added to 325 ml of the buffer solution, what is the ph after the addition? the pka of hydrofluoric acid is 3.16.

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 periodic table is arranged in order of atomic number."

the answer would be a

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.