Be sure to answer all parts. What are the possible values for m, when the principal quantum number (n) is 2 and the angular momentum quantum number () is 0? +3 O +2 O -1 -2 -3 What are the possible values for m, when the principal quantum number (n) is 3 and the angular momentum quantum number () is 2? +3 +2 +1 -1 -2 O O OOO 00

(a) 1.23 M sugar (C₁₂H₂O₁) solution (density of solution 1.12 g/mL) 1.09 201 (b) 0.849 M NaOH solution (density of solution 1.04 g/mL) m (c) 5.21 M NaHCO, solution (density of solution 1.19 g/mL) m Guided S

For an experiment you are measuring the decomposition rate of organic matter, You have a large amount of CH402 in a container filled with 3.024 Lof water. You Created a saline environment by adding 2.4 g of sodium chloride, 3.6 g of calcium chloride, and 2.8 g of magnesium chloride before diluting. iron (1) oxide is available for the microbes to oxidize the matter into carbon dioxide by forming iron (II) aqueous ions. At the beginning of the experiment, you measure the pH using a probe to be 7.13. After 73 hours you measure the pH again and obtain 7.54. Assuming that the pH change is solely due to the oxidation of organic matter, what is the rate of organic matter decomposition in nanograms per hour?

(a) Iz(s) + 5 Cu²* (aq) + 6 H;O(I) –→ 2 103"(aq) + 5 Cu(s) + 12 H*(aq) (b) Hg²*(aq) + 21 (aq) → Hg(1) + Iz(s) (c) H2SO3(aq) + 2 Mn(s) + 4 H¯ (aq) · S(s) + 2 Mn²*(aq) + 3 H2O(I)

(a) You are about to prepare three solutions of 0.5 M KI, 0.01 M K2S2O8, and 0.01 M Na2S2O3*5H2O in 250 mL volumetric flasks. - Describe how you will go about this, i,e, explain all steps of weighing of solutes, volumetric measurements (filling up with deionised water) ect. Calculate what mass of solute you will need in each of solutions mentioned above that you need to prepare. Show all calculations steps. (b) You are also tasked to fill burettes with the above-mentioned solutions, however, after filling up the solutions, you realised that there is a bubble towards the bottom tip inside the burette. Is it wise to continue with the experiment, while there is a bubble, if NOT explain why. (c) According to the manual's Experimental procedure, one conical flask (flask 1) contains a mixture of 20 mL of the KI solution plus 10 mL of the Na2S2O3 solution, while in the second flask (flask 2) there is 20 mL of the K2S2O8 solution with added five drops of starch solution. Why can't you add…

Complete and balance the following redox reaction in basic solution 2- 3c₂²- 1 + 2 (s) H* CIO₂(g) →CIO₂ (aq) + CIO3(aq) 3 4 H₂O Reset ( (1) LO 5 OH- H 6 (g) H3O+ 7 8 CI • x H₂O 9 (aq) S

Ni (s) + Cu,SO, (aq) >