Question 13 (of 20) 1.00 points Ch. Ex. 42 mass percent composition- use with solution mass...
W-assignment Saved 6 attempts left Check my work How many g of solute are needed to prepare the following solution? 1.50 x 102 g of 2.00% (m/m) Na2CO3 Enter your answer in the provided box. g Na,Co;
8. value: 10.00 points Ch. Ex. 101 - Calculate molarity given mass and liters 3 attempts left Check my work Calculate the molarity of 123 grams of sucrose, C12H22011, in 1.00 liter of solution. M sucrose
Question 14 (of 30) 14. values 10.00 points Ch. Ex. 69 - Boiling points - rank compounds 1 attempts left Check my work Click and drag the options into the described order. Rank the following compounds in order of increasing boiling point: CH CH.CH(CH3) CH,CH,CO,H, and CHCH,COCH;. сH,CHснісн) сненсон CH.CH COCH Lowest Bolling Point Highest Boiling Point
Question 11 of 15) value 1.00 points 3 attempts left Check my work Enter your answer in the provided box. solution of NaOH. Calculate the pH of a 1.0 x 10M pH= Question 14 (of 15) value: 1.00 points 3 attempts left Check my work Enter your answer in the provided box. Calculate the pH of a solution with a H2O concentration of: 1.8 x 10-6 M
1.00 points 3 attempts left Check my work 2 Enter your answer in the provided box. The rate constant for the second-order reaction: 2NOBr(g) → 2NO(g) + Br2(g) is 0.800-s) at 10°C. Starting with a concentration of 0.86 M, calculate the concentration of NOBr Report problem Hint Solution Guided Solution after 67 s. Be sure to report your answer to the correct number of significant figures. References eBook &Resources
2 attempts left Check my work Enter your answer in the provided box. A solution of 1.15 g of solute dissolved in 25.0 mL of H20 at 25°C has a boiling point of 100.750°C. What is the molar mass of the solute if it is a nonvolatile nonelectrolyte and the solution behaves ideally (d of H20 at 25°C = 0.997 g/mL)? g/mol
Ch. Ex. 63- Half-life - use value and interval to calculate mass of sample remaining 5 attempts left C Check my work If 3.3 mg of the radioisotope iodine-131 is administered to a patient, how much will remain in the body after 27 days, assuming that no iodine has been eliminated from the body by any other process? (The half-life of iodine-131 is 8.1 days.) mg
calculate the mass in g corresponding 2.100 mol H2O < Question 2 (of 8) value 1.00 points 3 attempts left Check my work Calculate the mass in g corresponding to 2.100 mol H,0. Enter your answer in the provided box. TH,0 Type here to search of 9 e FIO # A % A & m
Question 18 (of 18) 5.65 points Ch. Ex. 55- Calculate Mass Formed Using Ideal Gas Law 1 out of 3 attempts Enter your answer in the provided box. Assistance How many grams of phosphine (PHy) can form when 253 g of phosphorus and 86.1 L of hydrogen gas react at STP? P-Be PBye) abalanced] g PH
ch.13 answer each of these please What is the boiling point of an aqueous solution that has a vapor pressure of 22.5 torr at 25°C? (Puo 23.78 torn; Kb = 0,512 °C/m). Express your answer using four significant figures. VO AXO ? c A solution contains 10.55 g of unknown compound (non-electrolyte) dissolved in 50,0 mL of water. (Assume a density of 1.00 g/mL for water.) The freezing point of the solution is -4,35 °C. The mass percent composition of...