CHEMISTRY

• A 22.0-g sample of HF is dissolved in water to give 2.0 × 10² mL of solution. The concentration of the solution is:
•  1.10 M
•  0.11 M
•  5.5 M
•  11.0 M
•  0.22 M
•  
• ???????
• What volume of 18 M sulfuric acid must be used to prepare 1.90 L of 0.162 M H₂SO₄?
•  5.5 mL
•  1.5 × 10³ mL
•  0.31 mL
•  3.2 mL
•  17 mL
•  
• ???????????????
• The following reactions
•  
• 2K(s) + Br₂(l) → 2KBr(s)
•  
• AgNO₃(aq) + NaCl(aq) → AgCl(s) + NaNO₃(aq)
•  
• HCl(aq) + KOH(aq) → H₂O(l) + KCl(aq)
•  
• are examples of
•  redox reactions.
•  precipitation reactions.
•  precipitation (two) and acid-base reactions, respectively.
•  redox, precipitation, and acid-base, respectively.
•  None of these choices are correct.
•  
• ??????????????????
• Which pair of ions would not be expected to form a precipitate when dilute solutions of each are mixed?
•  Al³⁺, S^2–
•  Mg²⁺, SO₄^2–
•  Ba²⁺, PO₄^3–
•  Pb²⁺, Cl^–
•  Pb²⁺, OH^–
•  
• ???????????
• In the balanced molecular equation for the neutralization of sodium hydroxide with sulfuric acid, the products are:
•  NaSO₃ + 2H₂O
•  NaSO₄ + H₂O
•  2NaSO₄ + H₂O
•  Na₂S + 2H₂O
•  Na₂SO₄ + 2H₂O
• ???????????
• The oxidation state of iodine in IO₃^– is:
•  –5
•  –3
• +3
• +5
• 0

 +3PLEASE ANSWER THESE QUESTIONS ASAP
I NEED IT TO BE DONE IN 1 HOUR