Question 4 of 10 Submit What is the pH of a 0.0560 M solution of hydrocyanic acid, HCN (Ka = 4.9 x 10-10)? 1 2 3 +/- 0 x 100 Tap here or pull up for additional resources
Question 8 of 10 Submit What is the concentration of a solution made with 0.450 moles of KOH in 400.0 mL of solution? 1 2 3 +/- x 100 Tap here or pull up for additional resources
help! i got it wrong Question 14 of 62 Submit What is the pH of a 0.0380 M solution of HONH3CI (Kb of HONH2 is 1.1 x 10-8)? 3.6 1 2 3 7 +/- 8 : 9 0 +/- x 100 Tap here or pull up for additional resources
Question 9 of 12 Submit What is the pH of a 9.7 x 10-6 M KOH solution? 1 4 7 +/- 2 5 8 : 3 6 9 0 x 10 Question 10 of 12 Submit The pOH of 0.0240 M solution of Sr(OH)2 is 1 4 7 +/- 2 5 8 : 3 6 9 0 x 10
Question 5 of 10 Submit What is the solubility of MgCO, in water? (Ksp of MgCO, is 3.5 x 10-) M 1 2 3 +/- 0 x 100 Tap here or pull up for additional resources
Question 7 of 9 Submit How many electrons can be assigned to orbitals designated by the quantum numbers n = 2,4 = 1? 1 2 3 +/- 0 x100 x 100 Tap here or pull up for additional resources
Question 20 of 64 Submit What is the frequency of green light that has a wavelength of 531 nm? (c = 3.00 x 108 m/s) 1 4 2 5 3 6 +/- 0 x 100 Tap here or pull up for additional resources
Question 10 of 23 Submit What is the mass of 15.00 L of propane vapor (C3H8) at STP? (1 2 3 +/- 0 x 100 Tap here or pull up for additional resources
Question 3 of 9 Submit What is the energy of a mole of photons that have a wavelength of 701 nm? (n = 6.626 x 10-34 J.S and c = 3.00 x 108 m/s) 1 2 3 +/- 0 x 100 Tap here or pull up for additional resources
Question 8 of 10 Submit For the reaction below, Kc = 1.10 x 10-4. What is the equilibrium concentration of C if the reaction begins with 0.200 MA and 0.750 MB? 2 A (aq) + B (aq) = C (aq) 123 +/- 0 x 100 Tap here or pull up for additional resources