If I have 58.4 grams of NaCl, how many molecules do I have?

Need help with some Chemistry homework please :)?

• Which reaction correctly describes how LiBr will dissociate in water? A. LiBr(s) à Li (aq) + Br (aq) B. LiBr(s) à Li-(aq) + Br+(aq) C. LiBr(s) à Li+(aq) + Br-(aq) D. LiBr(s) à LiBr (aq) Calculate the number of grams of CaCl2 needed to make 5.0 L of a 0.10 M solution. A. 0.5 g B. 55.5 g C. 50 g D. 2.22 g Will a red blood cell undergo crenation, hemolysis, or neither when placed in a 2% NaCl solution? Will sodium sulfate (Na2SO4, a strong electrolyte) contain ions only, molecules only, or molecules and ions? Which is the solute in the following solution: 100.0 mL of water and 5.0 grams of sugar? How much solute is needed to prepare 450 mL of a 2.0% (m/v) potassium chloride solution? A. 9 g B. 225 g C. 900 g D. 0.00004 g What is the molarity of the solution when 36.5 grams of HCl is dissolved to make 1.0 L of solution? A. 0.001 M B. 36.5 M C. No answer possible since we do not have the moles of HCl (we only have grams). D. 1.0 M What is the mass/volume percent (m/v %) when 2.50 grams of KCl is dissolved in 50.0 mL of solution? Question 10 answers A. 0.05% B. 50% C. 5.0% D. 20% Thank you!

• Answer:

  1. B 2. 55.5g 3. crenation 4. ions only 5. 5.0 grams of sugar 6. 9g