Page 3 of 5 Problem 7 The initial molar concentration of formic acid (HCOOH) is 1.7 M. What is the pH of the solution, if the ionization constant for acetic acid is K = 1.7x104? Enter your answer in the box provided with correct units and sig. figs.: The pH of the solution is ): pH = Answer:

Q: For the following reaction, 4.74 grams of butane (C,H10) are allowed to react with 20.7 grams of…

A: The limiting reagent in a chemical reaction is a reactant that is totally consumed when the chemical…

Q: QUESTION 7 One mole of particles of any substance contains how many particles? 3 x 10-10 particles 3…

A: 7) The value of the mole is equal to the number of atoms in exactly 12 grams of pure carbon-12.

Q: What symbol should appear in the blank to correctly complete the following equation? ________ + 0-1e…

A: The given reaction is an electron capture reaction and the general form of the reaction is as…

Q: An alloy contains 78.7% zinc by mass. If a sample has a total mass of 230 grams, how many grams of…

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Q: cofmpounds described below: Please Note: Chemical notation is case sensitive acetic acid, C2H4O2…

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Q: How many moles of CO_(2) are present in 88.0 grams of CO_(2) ?

A: The given mass of CO2 = 88.0 gThe moles of CO2 =?

Q: Calculate the number of oxygen atoms in a 80.0 g sample of forsterite (Mg, SiO,).

A: number of moles = mass/molar mass  1 mol contain atoms equal to 6.022 × 1023

Q: b. Give the % Cu and % Zn for each type of penny. % Cu % Zn pre '82 penny post '82 penny

A: We are to discuss the chemical composition of a penny in pre '82 and post '82 period.  A penny is an…

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A: The question is based on the concept of analytical chemistry. we need to identify the correct…

Q: Be sure to answer all parts. Tin (Sn) exists in Earth's crust as SnO,. Calculate the percent…

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Q: Katie heats her hydrate to remove the water and obtain the anhydrous cobalt (II) compound CoCl2. Her…

A: Molar mass of H2O is 18.02 g/mol. Molar mass of CoCl2 is 129.84 g/mol. Mass of water removed can be…

Q: Deionized water is added to a 138.0 mL sample of 1.103 M oxalic acid to dilute it to 0.436 M. What…

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Q: 32 percent b. If the interest rate on U.S. Treasury debt Treasury? (Assume a total debt of $25…

A: Given that, the total debt of US Treasury is $25 trillion. The internet rate of Treasury debt is 4%.…

Q: Provide strengths analysis for Jollibee Fast Food.

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Q: If people were to start counting by 100s from the second they were born and never stopped until they…

A: We know that, 1 year = 365 days 1 day = 24 hours 1 hour = 60 min

Q: What is the mass of 4.60 moles of magnesium chloride, MgCl2 ? Express your answer with the…

A: Given, moles of MgCl2 = 4.60 mol

Q: Part D-Yield Calculations Which of the following errors could cause your percent yield to be falsely…

A: In the context of experimental chemistry and percent yield calculations, the question addresses the…

Q: Active Dosage Form Raw Materials Actual Yield Formulation Packaging Ingredient Calcium carbonate 2…

A: Given that -  Calcium carbonate mass = 1.75 kgs  Calcium oxide mass = 2 kgs  Water mass = 1.75 kgs…

Q: pure density liquid A. 31. What is the density of a mixture that is 2.3 moles A and 2.7 moles B?…

A:

Q: What is the percent by weight (w/w%) of sugar in soda? Assume the average mass of sugar in soda is…

A: w/w % =( mass of solute(g)/mass of solution(g))*100

Q: What type of balance are you going to use if you are weighing a sample for sample analysis? Explain…

A: A question based on analytical process that is to be accomplished.

Q: How many grams are in 491 mg ? Express your answer numerically in grams. • View Available Hint(s) ?…

A: The unit conversions are performed using equality factor. Here, mg (milli gram) has to be converted…

Q: When we need sample preparation for analysis? use your own words to write

A: 1) Preparation is a very important step in most analytical techniques because the techniques are…

Q: 41. Add the correct coefficients to properly balance this equation. C10 H16 + Cl, → C+ HC1

A: Equation is balanced when the number of elements are equal in both sides of the equation.

Q: Find the percentage of calcium (Ca) in the powdered eggshell sample used.

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Q: If you wished to compare your calculated answer above to a directly measured mass, would you need to…

A: Mass of zinc obtained in calculation from density and volume measurement is 1.4 g

Q: At rest, a person inhales 5.88 x 1023 nitrogen molecules in an averag breath of air. How many moles…

A: A person inhales, 5.88×10^ 23 nitrogen molecule

Q: Br- CI The chlorine in is at position

A: In cases of halogen priority is decided by atomic no. More the atomic no. More is the priority.…

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Q: Chemical energy

A: Ans. False.  Chemical energy can not be determined by mass and chemical composition. The difference…

Q: Determine the formula weight of BaSO₄. Provide an answer to two decimal places.

A:

Q: How would the following procedural error affect the experimental results? Briefly explain. When the…

A: When the final mass was determined, there was water on the foil and outside of the flask the way in…

Q: Part B Ba+N2 Express your answer as a balanced chemical equation. ΑΣφ ? Previous Answers Request…

A: Barium on reaction with Nitrogen forms Barium nitride.Balanced chemical reaction is given by:

Q: Determine the formula weight of CaCl₂. Provide an answer to two decimal places.

A: FORMULA MASS: Every element in the periodic table has its own atomic masses. A chemical compound is…

Q: If you did not properly dry the beaker before adding the sample, how would this influence the final…

A: It is given beaker is not properly dry before adding the sample.

Q: b) the mass of used acetylene in pounds 0.734 0.434 0.299

A: 40 inches long and 6 inches diameter a drum contains acetylene at a initial pressure of 250 psia…

Q: b) Calculate the equivalent weights of the following compounds. (i) H₂C2O4.2H₂O i) Ka Cra 07 MnSO4…

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Q: MISSED THIS? Watch IWE: The Mole Concept-Converting Between Mass and Number of Molecules ; Read…

A: We will require the molar mass of the substance to calculate the mass of a substance from moles. As…

Q: If the experimental molar mass for Benzoic acid was found to be 133 What is the % error. (See…

A: Given: The experimental molar mass of benzoic acid = 133 g/mol Standard data: The theoretical…

Q: Tell whether each of the following errors will cause the experimental mass percent of the sodium…

A: Proper heating  is  necessary  for maintaining  yield of the reaction  .

Q: A fish tank holds 25 gal of water. How many kilograms of water are in the fish tank?

A: given volume of water = 25 gal to find mass of water ( m water) =?

Q: I mole 6.02 x 10" particles 6.02 x 10" particles I mole Complete the calculations using dimensional…

A: 1 mole zinc =6.02×1023 atoms of Zinc Number of atoms present in 2.50 mole of zinc has to be…

Q: Question 34 How many grams of oxygen (O) are present in a 6.35 g sample of potassium nitrate (KNO3)?…

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Q: Which of the following statements is incorrect? a. Safety shower would immediately be used if your…

A: Laboratory safety is very important in order to maintain a safe environment for the researchers as…