Solution Concentration Practice Problems Directions: Read the following questions carefully. Answer in the space provided. Remember units and significant
figures where appropriate. SHOW ALL WORK TO RECEIVE CREDIT. No work, no credit, no kidding!
1. What is the percent by mass of 2.8 g of benzoyl peroxide in a 28 g solution of acne medication?
RO
2. What is the percent by mass of 5.4 g of potassium nitrate in 260.9 of water?
3. You have 150. g of a bleach solution. The percent by mass of the solute, sodium hypochlorite (NaCl), is 3.62%.
How many grams of Nool are in the solution?
RO
4. In question 3 above, how many grams of solvent are in the solution?
PAGE 1 OF 2

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:

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being