3. Calculate the pH of the following (make sure to use proper significant figures): a. 5.0...
Convert the following units. Make sure that your answer has the proper number of significant figures. a. 4.8 g/cm3 to kg/m3 b. 941 µm to km. Use scientific notation for your answer. (µ is the prefix "micro" and 1 µm = 1 x 10−6 m) c. The speed of light is 2.9989 x 108 m/s. Convert to miles/hour. Use scientific notation in your answer. d. 782 kg to µg. Use scientific notion for your answer.
Calculate the pH of the following solution: [H3O+] = 3.5x10–8 M. with proper significant figures
Perform the calculation and report the answer using the proper number of significant figures. Make sure the answer is rounded correctly. 1.012×10−3 J/(0.014456 g) (298.3682−298.3567)K
What is the pH to the correct number of significant figures for solutions with the following concentrations of H3O+ or OH−? [OH−] = 5.0×10−3 M pH= [H3O+] = 10−8 M pH= [H3O+] = 4.0 M . pH=
Calculate the pH to the correct number of significant figures for solutions with the following concentrations of H3O+ or OH? . Part A Part complete [H3O+] = 2.5×10?5 M SubmitPrevious AnswersRequest Answer Part B Part complete [OH?] = 10?3 M pH = SubmitPrevious AnswersRequest Answer Part C Part complete [H3O+] = 3.50×10?9 M pH = SubmitPrevious AnswersRequest Answer Part D Part complete [H3O+] = 9×10?3 M pH = SubmitPrevious AnswersRequest Answer Part E Part complete [OH?] = 15 M pH...
3. Calculate and insert the proper values to complete the following table: 8pts) [H+M pH Acidic or Basic [OH-M Solution 8.21 POH 1.78 x 10 3.70 x 10-2 4. Give definitions of an Arrhenius acid, a Bronsted-Lowry acid, and a Lewis acid. (3pts) 5. Write the two reactions for the complete dissociation of H.SO., a polyprotic acid. 2pts) 6. Calculate the pH of a 0.015 M solution of HBr. Circle your answer. (2pts)
Be sure to answer all parts. Report your answer with the proper number of significant figures. Magnesium is used in lightweight alloys for airplane bodies and other structures. The metal is obtained from seawater in a process that includes precipitation, neutralization, evaporation, and electrolysis. How many kilograms of magnesium can be obtained from 7.00 km3 of seawater if the initial Mg2+concentration is 0.15% by mass? (d of seawater = 1.04 g/mL) I got 1.06 x 10^14 not right
show work please 2. Convert the following units. Make sure that your answer has the proper number of significant figures a. 4.8 g/cma to kg/m b. 941 μm to km. Use scientific notation for your answer. (μ is the prefix "micro" and 1 μm 1 x 10-6 m) c. The speed of light is 2.9989 x 108 m/s. Convert to miles/hour. Use scientific notation in your answer. d. 782 kg to ug. Use scientific notion for your answer.
Calculate the pH of the following acid–base buffers. Be sure to state and justify any assumptions you make in solving the problems. a. 100.0 mL of 0.025 M formic acid and 0.015 M sodium formate b. 50.00 mL of 0.12 M NH3 and 3.50 mL of 1.0 M HCl c. 5.00 g of Na2CO3 and 5.00 g of NaHCO3 diluted to 0.100 L 4. (10 Points) Calculate the pH of the buffers in problem 3 after adding 5.0 mL of...
AUSWC. 5) What is the H30* concentration to the correct number of significant figures for solutions with the following pH values? (a) 0.00 (b) 7.00 (C) 2.63 (d) -0.42 (e) 11.21 (a) Calculate the pH of a buffer solution that is 0.45 M in NH4Cl and 0.15 M in NH3. (b) How would you prepare an NH4Cl-NH3 buffer that has a pH of 9.00? (The Kb for NH3 is 1.8 x 10)