what does it mean to have 12% of percent error while conducting an experiment in determining the fluoride content found in toothpaste

Q: 5. A system compresses when 457 J of work was done on it at the same time it decreases it energy to…

A: Given,  A system 457 J of work done when it compresses, at the same time it decreases energy to 234…

Q: A small amount of Mg-EDTA is often added in the titrimetric determination of water hardness. Why?…

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Q: fou make a 0.018 M aqueous solution of ammonia (NH3). Remember that ammonia is the conjugate base of…

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Q: (1) The radioactive isotope selenium-75 is used in medical imaging as indicated on the table above.…

A: Dear student since you have asked two different questions but according to guidelines we will solve…

Q: lote: to convert °C to K, use this formula: K= °C + 273.15 Table 10. Data on Temperature-Pressure…

A: Determine the behavior of gases---

Q: 1. Consider the following mechanism. 03 → 02 +0 (fast) O3 +0→ 202 (slow) (a) Write the overall…

A:

Q: The preparations of two aqueous solutions are described in the table below. For each solution, write…

A: Given table is :

Q: Draw 3 molecules of CH3CH2OH (ethyl alcohol) using Lewis Structure/Kekule Formula. Identify the…

A: Given,  Draw 3 molecules of CH3CH2OH (ethyl alcohol) using Lewis Structure/Kekule Formula. Identify…

Q: The following experimental values were obtained for a 1 x 10 M p-nitrophenylphosphate (S) solution,…

A:

Q: What is the equilibrium law for the reaction 4 NH3(S) + 3 02ls) 6 H20(g) +2 N2(g) in terms of…

A: Kp is the ratio of the equilibrium concentrations of product over equilibrium concentrations of…

Q: During recharge the following reactions occur in the lead-acid battery.          Cathode: PbSO4 (s)…

A: At cathode -> PbSO4(s) + 2e-------> Pb(s) + SO42-(aq) At Anode -> PbSO4(s) + 2H2O…

Q: What is the expected pH of an aqueous solution consisting 150.0 mL 0.2500 M HBr04 mixed with 150.0…

A:

Q: do the following: name the compounds

A:

Q: Enter your answer in the provided box. If 0.10 mol of ammonium chloride (NH,C) is dissolved in a…

A: Given that, the amount of heat is Q = -6.9×102 cal. The mass of the solution is m = 1.39×102 g, The…

Q: In the industrial "chlor-alkali" process, pure chlorine and sodium hydroxide are produced by…

A:

Q: Which of the following is the strongest oxidizing agent? O CIO2(g) O H2O2(aq) O Br2() O Mg(s) O…

A: In this question, we have to choose the strongest oxidizing agent.

Q: Why is it necessary to study the diffusion of molecules in biological systems? To understand…

A: Diffusion is the process of random motion of molecules in which there is a net flow of matter from a…

Q: Give a clear handwritten answer and explain

A: Give the full name of the given compound---

Q: Which of the following acids or bases will have the lowest pOH? Select one: O A 0.10 M H;S04 (pKa,…

A: Given data: Solution Concentration with pKa and acid  or salt A 0.10 M H2SO4 ,  pKa = 1.92 B…

Q: 11. Which statement properly describes the differences between a real gas and an ideal gas? The…

A: In this question, we have to choose the statement which describes the differences between a real gas…

Q: A 2.00 g sample of a salt (MX(s)) is added to 20.0 g of water at 22.0 °C in a calorimeter. The…

A: Given that, a 2.00 g of a sample of a salt MX(s) is added to a 20.0 g of a water at 22.0oC. So, the…

Q: The reaction C(s)  + CO2(g) ⮀ 2CO(g) at 727 K has a Kp of 167.5. The partial pressure of CO2(g) is…

A:

Q: Why is it necessary to study the diffusion of molecules in biological systems? (а.) To understand…

A: THE CORRECT SOLUTION IS SHOWB BELOW.

Q: lodine-131 is used to treat Graves disease, a disease of the thyroid gland. The amount of 1311 used…

A: Dose is 86 microcuries per gram of thyroid gland.

Q: imbo dim 5. 1. 6. 2. 3. 7. HO, HO, Answer the question below about the fatty acids shown.

A:

Q: CH3

A: Note : Start numbering at bridge carbon. Then write substitutions first followed by parent…

Q: Which of the following describes the reaction: positron emission O beta decay reaction bombardment…

A: Given that, a decay reaction is We have to tell the type of the decay reaction.

Q: 38. Rank the following molecules from lowest to highest boiling point: CH4, He, HF, C,H10- А. C4H10…

A: The correct order of boiling point is given below

Q: (A) Give IUPAC name and (b) Classify if E/Z or cis/trans

A:

Q: (d) Consider the titration of 30.0 mL of 0.050 0 M piperazine with 0.300 M HCI. Calculate the pH at…

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Q: 2NH, (g) + 20,(g) - N,0(g) + 3H,0(g) the initial mixture contains 8.50 mol NH3 and 7.25 mol O2. At…

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Q: 5 2. RED ORANDE YELLOW OREEN BLUE BROWN IL 6 9 4

A: The Retention factor of brilliant blue can be calculated as follows

Q: Which of the following molecular characteristics will be expected to increase the solubility of a…

A: The solubility of a solute depends on the bonds and forces between them, temperature and pressure.

Q: Suppose that the total mass of the reactants in a chemical reaction was 100.00000 g. How many…

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Q: Which of the following characterizes an alpha ray? Choose all that apply. | carries a positive…

A: Alpha ray is composed of Alpha Particles which is equivalent to Helium atom .

Q: Which of the following acids or bases will have the lowest pOH? Select one: OA 0.10 M H2SO4 (pKa,…

A:

Q: Consider a solution consisting of 1.75 mol water and 0.97 mol ethanol. Express your answers in three…

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Q: 2. Explain the term 'buffer capacity'.

A: Explanation of term "buffer capacity "

Q: Chy-C - CH, + H* CHg - C- oH + HO-CHy → CHy-Ö-O-CHg + HOH CHy-Ċ = CHg +HqO %3D 84

A: In reaction 1- Ethanoic acid + methanol --> Methyl acetate   In reaction 2- 2-Methyl propene…

Q: Which of the following molecules would be the least polarizable? CH3CH3 SiH SIH SIH3 SIH SIH All of…

A: Given,  Which of the following molecule will be least polarizable = ?  Options are :  a). CH3CH3…

Q: The rate constant, k, for a first-order reaction is 1.36 x 10^3 s –1 at 90.°C and the activation…

A: Given-> K1 = 1.36 × 103 s-1    T1 = 90°C = 90 + 273 = 363 K K2 = ?                           T2 =…

Q: Source Dose (mrem/year) Naturally Occurring Radiation Cosmic rays Terrestrial radiation (rocks,…

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Q: i need help in  comparing ir spec of 1,4-dimethoxybenzene versues  1,4-dimethoxybenzene and what is…

A: We need to compare the IR spectra of the two compounds:   2,5-di-tertbutyl-1,4-dimethoxybenzene and…

Q: How many grams of solute are present in each of the following aqueous solutions? (a) 575 mL of a…

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Q: onsider the reaction Cl,(g) + Br,(g)→2 BrCI(g) at 25 °C. he entropy change for the reaction is 11.6…

A: Given-> ∆S° = 11.6 J/mole.K ∆H° = 29.4KJ/mole = 29400 J/mole ( 1 kJ = 1000 J) T = 25°C = 25 + 273…

Q: 5. Consider the reaction between sulfur dioxide and oxygen gas to form sulfur trioxide which has a…

A:

Q: Which of the following graphs best represents the change in the pH and the reaction quotient Q when…

A: Here we to predict the the nature of graph of reaction quotient ( Q ) versus time and the pH change…

Q: a,b, and c

A:

Q: (1) Describe the difference of hybrid orbitals such as sp, sp? and sp³. (2) Why diamond and the lead…

A: DETAIL EXPLANATION GIVEN BELOW

Q: Exercise 16.130 I Review Part A Lakes that have been acidified by acid rain can be neutralized by…

A: Given :  pH = 5.7  Volume of Lake = 4.2 billion litre