2- Analytical chemistry : is a measurement science consists of a set powerful ideas and methods that are useful in all fields of science and medicine. It is a qualitative analysis and quantitative analysis . True False
Q: What mass of C6H1206 (glucose) is needed to prepare 450. mL of a 0.650 M solution of glucose in wate...
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Q: The van der Waals equation of state was designed (by Dutch physicist Johannes van der Waals) to pred...
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Q: Name the following compound. Be sure to answer all parts.
A: To write the IUPAC Name
Q: 7. Predict the major organic product and propose a mechanism for the following reaction. Show each s...
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Q: 2. The Henry's law constant for helium gas in water at 30°C is 3.7 x 10-4 M/atm and the constant for...
A: Answer is given below
Q: How many grams of dry NH,Cl need to be added to 2.30 L of a 0.700 mol L solution of ammonia, NH3, to...
A: Given Data :
Q: Pentaborane B5H9(s) burns vigorously in O2 to give B203(s) and H20(1). Calculate AHpxn for the combu...
A: Heat of reaction: at particular temperature the amount of heat released or absorbed during a che...
Q: 4. The density of acetonitrile (CH3CN) is 0.786 g/mL and the density of methanol (CH3OH) is 0.791 g/...
A: Mole fraction of x = no.of moles of x/total moles Molality is the ratio of moles of solute to the m...
Q: What is the theoretical yleld of chromium that can be produced by the reaction of 40.0 g of Cr203 wi...
A: Theoretical yield is the amount of product (Cr here) formed when the given amount of limiting reacta...
Q: Enter the number of electrons in each energy level (shell) for each of the elements. If the energy l...
A: Enter the number of electrons in each energy level (shell) for Hydrogen element.,
Q: Decide whether each molecule or polyatomic ion s polar or nonpolar. do f the molecule or polyatomic ...
A: Polarity of given compounds:
Q: Write the solubility equilibrium constant expression for silver phosphate Show the ICE Table and ca...
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Q: What is the pH of a solution with a hydrogen ion concentration of 4.70X10 6 M? Your Answer: Answer
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Q: 12.43 How is vapor-pressure lowering related to a rise in the boiling point of a solution?
A: Please find your solution below : Vapour pressure of a solvent is defined as the pressure exerted by...
Q: calculating the concentration of acid in each buffer
A: Concentration of acetic acid (weak acid) = 1.10 M Concentration of sodium acetate (salt) = 0.90 M pK...
Q: What fraction of a reactant has been consumed after 4 half- lives in a first-order reaction? O a. 87...
A: Given- First order reaction ->number of half-life =4
Q: Consider the following reaction carried out a 1000 K: A (g) B (g) + C2 (g) Kp = 0.1000 a. At 1000 K ...
A: a.) To calculate the partial pressure , we would draw an ICE table and use given Kp value and Initia...
Q: taborane BgHg(s) burns vigorously in 02 to give B2031s) and H20(). Calculate AHxn for the combustion...
A: 2B5H9 (s) + 12O2(g) -----> 5B2O3(s) + 9H2O( l)
Q: A 13.6 mL solution of 0.100 mol L-1 CH3COOH is titrated using 0.150 mol L-1 NaOH. What is the pH of ...
A:
Q: A bufter sokution is prepared by mixing 145 ml. of .100 mol L HCI win 20 ml. of 0.100 mol L Trie. Wh...
A: Given-> Volume of HCl=14.5 ml Molarity of HCl = 0.100 mole/L Volume of tris =29 ml Molarity of tr...
Q: Calculate the change in pH that results from adding 0.160 M NaNO3 to 1.00 L of 0.160 HNO3 (aq).
A:
Q: Name the highlighted chemical group in each molecule. Lewis structure name of highlighted group Н—о:...
A: We have to identify the highlighted group.
Q: Write the net balanced equation for the reaction of ferrocene and (NH4)2Ce(NO3)6. What is the role o...
A: Ferrocene is an organometallic compound consisting of 2 cyclopentadienyl rings bound to a central me...
Q: 25.0 cm' of 2.0 mol dm- hydrochloric acid, HCI, was added to 50.0 cm' of 2.0 mol dm-3 sodium hydroxi...
A: Given data: Volume of HCl = 25.0 cm3 = 25 mL Molarity of HCl = 2.0 mol/dm3 = 2.0 mol/L Volume of N...
Q: An 93.1 mL sample of "wet" O2 (g) is collected overwater at 21.4oC and a barometric pressure of 755 ...
A: Here we have to use Daltons law of partial pressure. And to calculate the volume percent we need to ...
Q: An unknown compound has the following chemical formula: Al,Cl where x stands for a whole number. Mea...
A: given formula = Al2Clx
Q: Be sure to answer all parts. Calculate the molecular mass or formula mass (in amu) of each of the fo...
A: Molecular mass or formula mass of the substance is the sum of the atomic mass of each element presen...
Q: Be sure to answer all parts. Predict the sign of the entropy change for each of the following proces...
A: Given, Predict the sign of the entropy change for each of the following processes : (a). I2 (s) ---...
Q: The van der Waals equation of state was designed (by Dutch physicist Johannes van der Waals) to pred...
A:
Q: Determine the heat of reaction for the decomposition of calcium carbonate CaCO3(g) → CaO(s) + CO2(g)...
A: Determine the heat of reaction for the decomposition of calcium carbonate CaCO3(s) → CaO(s) + CO2(g)...
Q: following reaction is first order in N2O5: N2O5(g)→NO3(g)+NO2(g) The rate constant for the reactio...
A: N2O5 (g) --> NO3(g) + NO2(g) Rate constant = 0.053 s^-1 [N2O5]=0.055 M
Q: 5. Magnesium hydroxide (Mg(OH)2) has a pKsp value of 11.25. In a solution at pH 10, what is the maxi...
A: Given, pKsp of Mg(OH)2 = 11.25 pH = 10 What is the maximum Mg2+ concentration in µmol/L = ? What...
Q: 12.62 A solution of 2.50 g of a compound having the empirical formula C,H,P in 25.0 g of benzene is ...
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Q: boron trifluoride: partial pressure: Your answer is incorrect. • Total pressure in tank: Your answer...
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Q: 3. Commercial concentrated aqueous ammonia is 28% NH3 by mass and has a density of 0.90 g/mL. What i...
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Q: You are assigned as a design engineer to design a Carbon Dioxide Capsule (CO2). The design means you...
A: Given: Diameter of cylindrical float = 0.45 m Radius of cylindrical float = 0.225 m length of float ...
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Q: Be sure to answer all parts. Predict the sign of the entropy change for each of the following proces...
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Q: 6. Lysozyme is an enzyme that breaks bacterial cell walls. A solution containing 0.150 g of this enz...
A: Given Data : 1. Mass = 0.150 2. Osmotic pressure = 0.953 torr π = 0.953 torr × 0.00316 atm...
Q: Which of the following is true: I. First order reactions proceed at a constant rate II. First order ...
A: Given- First order reaction.
Q: ACT 3 Colligative Properties of Nonelectrolyte Solutions Review Questions 12.39 What are colligative...
A: Solution is made up of two components: solute and solvent. Component which is present in major amoun...
Q: What is the mass of 4.50 x 10- Cu atoms? Multiple Choice 7.47 x 10 amu 7.47 x 10 g 4.75 g 63.55 amu
A: Calculation of mass of cu atom:
Q: You are asked to prepare a pH = 3.75 buffer solution starting from 1.25 L of a 1.00 M solution of hy...
A: Given: pH of solution = 3.75 Volume of HF solution = 1.25 L Concentration of HF = 1.00 M Ka of HF = ...
Q: if the change in pH after addition of 1.0mL of 0.10N HCI is 0.09, what is the total buffer capacity ...
A: Given-> Volume of HCl = 1.0 ml Normality = 0.10 N Change in pH = 0.09 Volume of solution = 20 ml...
Q: Which of the following is NOT an intermediate in the following process? H3O*, Heat OH NH NH3* а. H20...
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Q: Check the statement(s) that are true. A. The internal electrons contribute to increasing the at...
A: Screeing effect is the effect in which inner shell electrons shields the the outer most shell electr...
Q: What is the pH of 2.24 M HCI solution?
A: Given :- concentration of HCl solution = 2.24 M To be calculated :- pH of solution
Q: Click in the answer box to activate the palette. Determine the empirical formula of a compound havin...
A: Element % K 24.74 Mn 34.76 O 40.50
Q: OH (d) CN
A: The compound has one carbonyl and one ester groups are present . Now to reduce the ester group witho...
Q: A toy top has a mass of 32.0 g CU. How many atoms CU are in this spinning top, given that the avera...
A: Given :- mass of Cu at the toy top = 32.0 g Average atomic mass of Cu = 63.55 g/mol To...
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- 1) Report the results of this calculation along with both the percent relative and absolute uncertainties. 417.3 ± 0.4 × 71.8 ± 0.7(647.21 ± 0.2 − 182.3 ± 0.4) Absolute uncertainty:Percent uncertainty:NSCI- Chemistry Answer only 1-3A chemist working as a safety inspector finds an unmarked bottle in a lab cabinet. A note on the door of the cabinet says the cabinet is used to store bottles of glycerol, ethanolamine, pentane, tetrahydrofuran, and dimethyl sulfoxide. The chemist plans to try to identify the unknown liquid by measuring the density and comparing to known densities. First, from her collection of Material Safety Data Sheets (MSDS), the chemist finds the following information:
- 2 In your one semester being enrolled in the subject Analytical Chemistry II, write your major take aways that you will never forget and explain why? For the purposes of improvement in terms of course delivery and curriculum, what changes do you wish to suggest? Finally, as a reflection, in a scale of 1-10 (1 being the lowest and 10 being the highest) how do you rate your performance in this subject.In Active Example 3-29 you calculated that you would have to work six weeks to earn enough money to buy a 1082.49 television. You would be working five shifts of four hours each at 9.25/hr. But, alas, when you received your first pay check, you found that exactly 23 of your earnings had been withheld for social security, federal and state income taxes, and workers compensation insurance. Taking these into account, how many weeks will it take to earn the 1082.49?Assessment 2 subparts 3-4
- Must answer all questions eslse downvote A. MULTIPLE CHOICE. Choose the BEST answer. PLEASE HELP ME ANSWER EVERYTHING THANK YOU Q)What is used for heating small amounts of solids at a high temperature?a) Mortar and pestleb) Evaporating dishc) Crucible and coverd) Clay triangleQ)Which of the following is used in separation techniques?a-Rubber policemanb-Graduated cylinderc-Volumetric flaskd-Filter paperQ)Which of the following describes a centrifugate?a-Always clearb-Supernatant liquidc-Discarded via decantation onlyd-Solid particlesQThe inward force that pulls substances towards its center is called .a-Gravitational forceb-Centrifotal shiftc-Continental shiftd-Centrifugal forceQA "slippery floor" is considered a .a-hazardb-riskc-flash pointd-toxicantQ)Mrs. Lily Potter is 24 weeks pregnant. She was exposed to a chemical while making a potion. What is the type of the chemical she should be avoiding?a-neurotoxicantb-asphyxiantc-teratogend-carcinogenQ)Which of the following should be…Pls answer the question linked below: https://pasteboard.co/0afMgF1vi1jX.pngChemistry (i) For T = 298K ΔG° = -8.314 x 298 x ln (2.83x10-3) = 14.524 KJ/mol (ii) For T = 308.15K ΔG° = -8.314 x 308.15 x ln (9.619x10-3) = 11.891 KJ/mol (iii) For T = 318.15K ΔG° = -8.314 x 318.15 x ln (3.14x10-2) = 9.147 KJ/mol (iv) For T = 328.15K ΔG° = -8.314 x 328.15 x ln (8.82x10-2) = 6.621 KJ/mol (v) For T = 338.15K ΔG° = -8.314 x 338.15 x ln (2.42x10-1) = 3.990 KJ/mol Based on the measured ΔG° values, is this equilibrium spontaneous at room temperature? Which factor, entropy, or enthalpy, has the greater impact on spontaneity in this case? Explain your answers.
- You are checking the accuracy of a volumetric flask marked 10.00 mL . To calculate the volume of water contained in the flask, you first measure the mass of the empty flask and the mass of the flask filled with water and take the difference. Then, you correct for the buoyancy factor and divide by the density of the water. The result of 8 such measurements is given in the table. Calculate the 95% confidence interval for these measurements with a mean of 10.03.5- What are the following abbreviations stands or? PPM, TMS, , Hz?4. A student measures the density of an Unknown liquid 3times and obtains an average density of 0.705g/mL with a Standard Deviation of 0.352g/mL. 1.What can you say.If anything about the Precision of the measurements? 2.What can you say if anything about the Accuracy of the average density?