Determine the %w/w of Na2CO3 in a 2.7518 g sample that was titrated by 41.92 mL of 0.6108 M HCl. Na2CO3 mw = 105.99 g/mol

Q: 2. The active component of aspirin is acetylsalicylic acid, HC,H,0, which has a Ka of 3.0 x 10-4.…

A: Answer: In this question a weak organic acid acetylsalicylic acid is given to us  and we have…

Q: Using enthalpies of formation, calculate the standard change in enthalpy for the thermite reaction:…

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Q: Which atom would have the largest effective nuclear charge for its valence electrons? a) Si b) S…

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Q: Which of the following statements are true? (select all that apply, The frequency of an…

A: We would use definitions of these terms and phenomenon to select true statements .

Q: Carbon monoxide reacts with water according to the following equilibrium reaction: CO (g) + H20 (g)…

A: ∆H° , ∆S° can be calculated using standard formation values of all Species involved in the reaction.…

Q: 1. Which one of the following is an example of week electrolyte? 1. NaOH 2. Naci 3. CH3COOH 4.…

A: here we are required to classify the given compounds as weak and strong electrolyte

Q: Yeast is used in baking the morning bread of Filipinos known as "pandesal". Why?

A: Yeast is used for the leaving of bread. Yeast uses the sugars and oxygen dough to produce more yeast…

Q: what is the melting point of divanillyl oxalate

A: Divanillyl oxalate can be made by the reaction of triethylamine, vanillin and oxalyl chloride.…

Q: Use a table of Standard Reduction Potentials to predict if a reaction will occur between Cd metal…

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Q: The volume of HCl gas required to react with excess magnesium metal to produce 6.82 L of hydrogen…

A: First write the reaction for magnesium metal with H2 and then check mol to mol ratio to calculate…

Q: Which of the following set of quantum numbers would not be allowed? n = 3, l = 2, ml =1 n = 3, l =…

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Q: 2OF2(g)  ---->  O2(g) + 2 F2(g)             ∆H= -49.4 kJ   How much energy (in kJ) is released…

A: Oxygen difluoride decomposes into oxygen and fluorine. The equation for the balanced chemical…

Q: Which one is smaller?    Mg or Sr

A: Atomic number of Mg = 12  Atomic number of Sr = 38

Q: Calculate the amount of energy (in KJ) released when 346g of steam at 182 Celsius is converted to…

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Q: 4. Comment how the concentration affects the rate. a. Concentration definitely has an affect on the…

A: Factors affecting rate of reaction

Q: The amount of gas that occupies 60.82 L at 31°C and 367 mm Hg in moles is: Select one: a. 11.6 b.…

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Q: Q) If VToluene = 25ml and Voit 25ml Vwater looml m wt find wt9

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Q: 5. Calculate Keq given the following: A(aq)=3B(s)+2C(aq) [A]eq= 0.812 M [B]eq=0.718 M, [C]eq= 0.319…

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Q: Calculate the Enthalpy of change in Kj/mol and % difference in the neutralization reaction below:…

A: Given neutralization reaction:

Q: is a chemical reaction and a chemical change the same

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Q: If a 1.54g sample of Zinc Oxide, 96.2%, were treated with 50ml of 1.0923N H2SO4 in the usual way,…

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Q: vapor pressure (in torr)

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Q: In the phase diagram shown, segment AD corresponds to the conditions of temperature and pressure…

A: The phase diagram given is,

Q: Classify each aqueous solution as acidic, basic, or neutral at 25 °C. Acidic Basic Neutral Answer…

A: At 25°C ;  pH + pOH = 14.0 pH = -log[H+]  pOH = -log[OH-]

Q: Ibuprofen, the anti inflamatory ingredient in Advil has the formula C13H18O2 A) How many molecules…

A: We have to predict the molecules  , number of H atoms, mole of ibuprofen, mass of ibuprofen.

Q: Which of the following statements is false? O The absolute entropy of a perfect crystal at absolute…

A: Here, we have to find the statement from the given statements that is false.

Q: starting with the equation, KOH(s)+CO2(g)=K2CO3(S)+H2O(L) Calculate the mas in grams of KOH that…

A: Given, KOH(s) + CO2(g) ➝ K2CO3(s) + H2O(l) mass of K2CO3 produced = 285 g mass of KOH required = ?…

Q: The enthalpy change ΔH for the IF5 reaction, shown below left can be calculated from the reactions…

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Q: Write the chemical formula for mercury(I) nitrate dihydrate

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Q: Imagine an alternate universe where the value of the Planck constant is 6.62607 x 10 40 J-s. In that…

A: Please find your solution below : Quantum mechanics is a theory that describe the nature of the…

Q: 15. For the following reaction, write how the each of the changes will affect the quantity of each…

A: According to Le chatellier 's principle, by change in any external parameters, reaction will arrange…

Q: A gas originally at 27°C and 1.00 atm pressure contained in a 3.9-L flask is cooled at constant…

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Q: Br2 ? hv

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Q: largest to smallest radius.

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Q: Suppose a 250. mL flask is filled with 1.9 mol of Br,, 1.8 mol of BrOC1 and 1.6 mol of BrC1. The…

A: First we would calculate initial molarity of all Species using their moles and volume.  Then we…

Q: liquid and 90.0 g of water has a freezing point of -3.33°C. Given Kf = 1.86 °C/m for water, the…

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Q: 7. Find the equilibrium concentrations for HA, H*, and A for the following reaction: K = 2.0 x 10-5…

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Q: Substance AHf (kJ/mol) KCIO3(s) -397.7 KCI(s) -436.5 What quantity of heat is released when 1.00 g…

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Q: 6. If the same amount of heat is added to 25.0 g sample of each of the metals in the chart below,…

A: Given,  If the same amount of heat added to 25.0 g sample of each of the metals, the metal which…

Q: How many unique protons are present in each of the following compounds? НО. CI 03:58:43 II III еВook…

A: The concept of equivalent or unique protons is generally used in spectroscopic studies of any…

Q: An object that has a mass of 75 g is heated from 50°C to 93°C. If it takes 3000 J for the…

A: Given: Mass of object = 75 g Initial temperature = 50°C Final temperature = 93°C Heat required =…

Q: If the Ka of a monoprotic weak acid is 5.8 × 10-6, what is the pH of a 0.47 M solution of this acid?

A: Given: Ka=5.8×10-6 Molarity of acid = 0.47 M

Q: In the following reaction, which only goes from left to right, which species is the oxidizing agent?…

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Q: 2/5 Question 2 Charles was drawn to the study of gases in the late 18th century because of his…

A: When pressure and mole is constant then  P/T = constant

Q: A 0.437 M solution of a weak base has a pH of 11.94. What is the base hydrolysis constant, Kp, for…

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Q: Determine the pH change when 0.086 mol NaOH is added to 1.00 L of a buffer solution that is 0.427 M…

A: First we would Calculate pH before addition of NaOH using Henderson Hasselbalch equation.  Then to…

Q: write the chemical formula for sodium acetate trihydrate

A: In a neutralization reaction an acid reacts with a base to form salt and water. Therefore, it can be…

Q: 8. Indicate whether the following statements are True or False: a. The common name for the elements…

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Q: Which of these compounds would exist primarily in an enol form? OA. OB. OC. D. OE.

A: Keto enol tautomerism is a type of structural isomerism. A chemical equilibrium between the keto and…

Q: An atom with 2 electrons, 2 protons and 4 neutrons has an atomic number of ...

A: Given -> Number of electrons = 2 Number of proton = 2 Number of neutron= 4