calculate the mass in g corresponding 2.100 mol H2O < Question 2 (of 8) value 1.00...
7. value 0.00 points 3 attempts left Check my work Calculate the number of mol corresponding to 19.0 g Be. Enter your answer in the provided box. mol Be value 1.00 points 3 attempts left Check my work Calculate the number of mol corresponding to 0.065 kg Si. Enter your answer in the provided box. mol Si 9. value 0.00 points 3 attempts left Check my work What is the average molar mass of the following elements? Be sure to...
3 attempts left Check Be sure to answer all parts. Calculate the mass in g corresponding to: (a) 13.9 mol He g He (b) 1.24 x 102 mol H, g H Type here to search
polnis 3 attempts left Check my work Calculate the mass in g of 0.280 mol of NH3. Enter your answer in the provided box g NH3
value 1.00 points 1 attempts left Check my work Enter your answer in the provided box. A buffer solution is prepared in such a way that the concentration of propanoic acid is 1.92 x 10 Mand the concentration of sodium propanoate is 1.51 x 10° M. If the buffer equilibrium is described by CH3COOH(aq) + H20(1) = H2O*(aq) + CH3C00 (aq) Gul propanoic acid propanoate ion with K = 1.34 x 105 calculate the pH of the solution. pH =...
< Question 4 (of 7) 4. value 10.00 points 5 attempts left Check my work Enter your answer in the provided box What volume of 0.18 MH,80, can be prepared by diluting 139 mL of 5.6 MH,SO? L References Muitart Answer Diculty
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
The Mole Concept and Atoms Question 6 (of 10) lue: 0 points 3 attempts left Check my work What is the mass, in g, of Avogadro's number of manganese atoms? Enter your answer in the provided box. Type here to search otê e
Question 13 (of 20) 1.00 points Ch. Ex. 42 mass percent composition- use with solution mass values to calculate solute mass values (Pool 2 of 2) 2 5 attempts left Check my work How many g of solute are needed to prepare the following solution 1.50 x 102 g of 350% (mm) Nazco, Enter your answer in the provided box. Report problem Hint g Na CO
Question 1 (of 15) value 1.00 points 3 attempts left Check my work Be sure to answer all parts. Enter the your answers using scientific notation. Repo So Calculate the [H3O+] and [OH ] of a sodium hydroxide solution with a pH = 13.00. [H,0*]=C 10 (select) M [OH ]= * 10 (select) M Guided * Type here to search
Calculate ΔG°(in kJ/mol) for the reaction NO2(g) + H2O(l) --> HNO3(l) + NO(g). (unbalanced) Question 7 Calculate AG°(in kJ/mol) for the reaction NO2(g) + H2O(0) --> HNO3(1) + NO(g). (unbalanced) Substance AGF(kj/mol) NO2(g) 51.8 NO(g) 86.7 HNO3(0) -79.9 H2O(l) -237.2 Write answer to two significant figures and correct sign.