Scarlett wants to make a buffered solution to clean the marker that Ada has generously donated to the wall in her bedroom. She needs to make an ideal buffer that has a basic pH. With her extensive chemistry experience, she knows she can use sodium carbonate (Na2CO3) and 1.0 M HCl to make the buffer she wants. Sodium carbonate is a dibasic base. The pKb of ,)# *M is 3.68 and the pKb of ",)# M is 7.65. The pKa of HCl is -10. **Hint** dibasic bases can make more than one ideal buffer If Scarlett needs 4 L of buffer with a total concentration of [CO3] = 0.25 M and a basic pH, calculate the gram amount of Na2CO3, volume of 1.0 M HCl and any additional water needed to create the buffer.

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

the population of unionid mussels in the hudson river decreased after zebra mussels were introduced. zebra mussels, a nonnative species, competed with the unionid mussels for food. the zebra mussels were able to outcompete the unionid mussels, allowing the zebra mussel population to increase dramatically over six years. the unionid mussel population decreased due to a lack of food.

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