As a technician in a large pharmaceutical research firm, you need to produce 300. mL of a phosphate buffer solution of pH = 6.96 and a total concentration of phosphate species 1.00 M. The pK, of H₂PO4 is 7.21. You have the following supplies: 1.00 M KH₂PO4 stock solution and 1.00 M K₂HPO4 stock solution. How much 1.00 M KH₂PO4 will you need to make this solution? (Assume additive volumes.) Express your answer to three significant digits with the appropriate units. ► View Available Hint(s) Volume of KH₂PO4 needed = Submit Previous Answers μA Value Units ? Units input for part A

As a technician in a large pharmaceutical research firm, you need to produce 300. mL of a phosphate buffer solution of pH = 6.96 and a total concentration of phosphate species 1.00 M. The pK, of H₂PO4 is 7.21. You have the following supplies: 1.00 M KH₂PO4 stock solution and 1.00 M K₂HPO4 stock solution. How much 1.00 M KH₂PO4 will you need to make this solution? (Assume additive volumes.) Express your answer to three significant digits with the appropriate units. ► View Available Hint(s) Volume of KH₂PO4 needed = Submit Previous Answers μA Value Units ? Units input for part A

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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U eFu X NCH X NCH X ъ Му х LU Oef X U Oef x U Oef x O Oef x LU Oef x LU Oef x A 202 x LU Oef x h Mic x i docs.google.com/forms/d/e/1FAlpQLSfSGcE8gf218c6JoHMWME1A8Nydf8M4g1yG93D-2LPpoMj_g/formResponse Question 5: The name of compound A in Figure 5 is 1-(butan-2-yl)-3- methylcyclohexane. Use this information to determine the IUPAC name of compound B. [Numbers are separated by commas and numbers and letters by hyphens Use lower case letters and do not use spaces.] * Jou antwoord Figure 5 A B 08:59 P Type here to search 25°C Sunny 2021/11/19
2) As an example of precision and accuracy of data, suppose the % carbon in a single compound has been measured thrce separate times by 2 different students. The theoretical % carbon is 21.34%. Student 1: trial 1:26.11%, trial 2: 26.24% trial 3: 25.92 %, Avg - 26.09 Student 2: trial 1: 20.35%. trial 2: 22.64 % trial 3: 19.79 %. Avg = 20.93 a) Which student had the more precise data and how can you tell? b) Which student had the more accurate data and how can you tell? 3a) Calculate the % error of Student 1 data in problem 2 above. Show all work below. WATCH SIG FIGS
Inbox ( (531) C Conver I Balance b Answer Inbox CHEM8 101 Che X С Ч-С -с- bartleb ь Мy Qu Unknov Search E I make app.101edu.co/# Bryant's Gmail Cascadia Canvas Lo... T GSBA Scholarship L... HOMEGROWN TRA... Learn Touch Typing... C The Science of Well... Investor360° ® Login ClickUp Reading list >> Question 9 of 40 Submit Consider the intermolecular forces present in a pure sample of each of the following compounds: CH:CH:CH:NH2 and CH:CH2CO:H. Identify the intermolecular forces that these compounds have in common. A) Dipole-dipole forces and hydrogen bonding. B) Dipole-dipole forces only. C) Dispersion forces, dipole-dipole forces, and hydrogen bonding. D) Dispersion forces and dipole-dipole forces + 10:43 AM e Type here to search 64°F 8/26/2021 (8)
Mla pnc.com/women Mail - Whi x O Grades for x Course Ho X G oxide cont X G Exercise 4.x E 4 - Molecu x O Bananas a X 1.84 x 10- x + envellum.ecollege.com/course.html?courseld 16985674&OpenVellumHMAC=a0b841caaee7feddab1623a6c83a92c0#10001 Review | Constants I Periodic Table Percent composition refers to the mass percent of each element in a compound: mass of element Part A mass percent = x 100% mass of compound > For example, the percent composition of water, H2O. is 11.2% hydrogen and 88.8% oxygen. Therefore, a 100-g sample of water contains 11.2 g of hydrogen atoms and 88.8 g of oxygen atoms. A hydrocarbon is a compound that contains mostly carbon and hydrogen. Calculate the percent composition (by mass) of the following hydrocarbon: CH22 Enter the percentages of carbon and hydrogen numerically to four significant figures, separated by commas. The periodic table will be useful when doing this problem. You can access a periodic table by clicking the "Tools" link in the upper right…
How many ng in 7.601 mg? Report your answer to 3 decimal places (examples 1.042, 0.050, 0.198, 3.000).
METHANE EMISSIONS: Mass per time (m/t): megagrams, or teragrams per year (Mg yr–1, Tg yr–1) Mass per unit area per time (m/(l2 t): grams per square meter per day (g m–2 d–1) What's their difference? Can mass per unit area per time can be converted to mass per time?
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LU eFu X NCH X E NCH X Ь Му х U Oef x LU Oef x LU Oef x LU Oef x LU Oef x W Oef x O 202 x LU Oef x O Mic X A docs.google.com/forms/d/e/1FAlpQLSfSGcE8gf218c6JoHMWME1A8Nydf8M4g1yG93D-2LPpoMj_g/formResponse Question 14: What is main organic product of the reaction in Figure 14? * O A B O D None of these products are correct. Figure 14 2HBR A Br Br Br C D Br Br Br Br 09:02 P Type here to search 25°C Sunny 2021/11/19 1 O O O
Rank the given compounds based on the melting point. (1=lowest)
1. Certified Reference Material (CRM), GSS-5, is certified to contain 40.67 ± 3.33 mg/kg of Ni in soil. An analysis of the CRM gives values of 40.39, 41.98, 43.64, 44.38, and 45.96 mg/kg. Determine the tcalc. value and determine if your results differ from the expected results at the 90 % confidence level?
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U eFu X NCH X A NCH X Ь Му х LU Oef X U Oef x U Oef x O Oef x LU Oef x LU Oef x U 202 x LU Oef x h Mic x i docs.google.com/forms/d/e/1FAlpQLSfSGcE8gf218c6JoHMWME1A8Nydf8M4g1yG93D-2LPpoMj_g/formResponse Question 23: Give the preferred IUPAC name of the compound in Figure 23. [Use lowercase letters. Do not use spaces except where required in the official name.] Jou antwoord Figure 23 OH NH2 09:09 P Type here to search 25°C Sunny 2021/11/19