A new element, arcadium, discovered on the planet Gallifrey has a half-life of 14.5 minutes. Predict how many milligrams will remain if a 827.2 mg sample of arcadium is measured after 43.5 minutes. Enter your answer to the tenths place. Next ▸

Q: This grap...ows how the vapor pressure of three liquids varies with temperature: vapor pressure,…

A: A question based on properties of liquid. A graph of vapor pressure against temperature is…

Q: What volume of carbon dioxide is produced when 94.8 g of calcium carbonate reacts completely…

A: Given  Mass of CaCO3 =94.8 gm Molar volume 1 mole=22.4 L

Q: 2 MnO2 (s) + 3 H+(aq) + N2H5+(aq) → 2 Mn2+(aq) + 4 H2O (l) + N2 (g) In the reaction above what…

A: When there is increase in oxidation state, process is known as oxidation. If there is decrease in…

Q: Q1) What is the Volume of HCI to prepare 0.1 M HCI? Q2) What is the Weight of KCI to prepare 0.1 M?…

A: Volume of HCl required to prepare 0.1M HCl. Generally we have 37% conc. HCl in laboratory. So, take…

Q: Discuss and determine whether both of the following molecules are chiral or achiral. Mention the…

A:

Q: What is the pH of a bleach solution that has a [OH-] = 7.1 × 10-5 M? pH = Is bleach acidic, basic,…

A:

Q: Lead-212 is used in medicine for cancer treatment. a) Wite the equation for the beta-minus decay of…

A: a) The beta-minus decay of Lead-212 can be represented by the following equation: 212Pb ->…

Q: A 1.09 gram sample of an unknown gas is found to occupy a volume of 0.847 L at a pressure of 612 mm…

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Q: 14-5-3 Silver bromide, a solid used in photographic film, can be prepared by mixing solutions of…

A: Given, The volume of the Silver nitrate AgNO3 solution = 2.50 L The molarity of the Silver nitrate…

Q: Which of the following substrates will undergo an SN2 reaction most rapidly? I CH3 CH₂-C-Br I CH 3…

A: We need to identify the substrate that undergoes SN2 reaction rapidly among the given molecules I…

Q: Select the best reaction conditions you could use to synthesize 2-bromo-3-methylpentane: ||| V }…

A: Given choices are    -----------------------------------------------------

Q: A redox reaction has an equilibrium constant of  K = 9.3 x 101.  Which   statement is true regarding…

A: The electrical work done in a galvanic cell is the product of the electricity (charge = nF) passed…

Q: A buffer solution contains 0.360 M NaHSO3 and 0.218 M Na2SO3. Determine the pH change when 0.093 mol…

A: we have to calculate the pH change for the buffer solution after addition of NaOH

Q: Question 51 Which of the following elements has the highest electronegativity and the smallest…

A: Electronegativity is defined as tendency of atom to attract the shared pair of electrons towards…

Q: Consider the reaction: 2 NO+O-2 NO When 1.000 mol O(g)s reacts with excess NO(g). 114.0 kJ of heat…

A: Option b) -114.0KJ To calculate the change in internal energy (AU) for the reaction, we need to…

Q: What ion does each of the electronic configuration belong to? a) [Ne] 3s¹ b) [Ar] d) [Ar] 4s² 3d4 e)…

A: The given electronic configurations are We have to match the given electronic configurations.

Q: Consider the following thermochemical equation: 2X2Y6(g) + 7O2(g) ⟶ 4XO2 + 6Y2O Δ?= -2.615 x 103 kJ…

A: Balanced chemical equation: 2X2Y6(g) + 7O2(g) ⟶ 4XO2 + 6Y2O ΔH= -2.615 x 103 kJ  Number of mol =…

Q: What volume of a 0.141 M barium hydroxide solution is required to neutralize 25.9 mL of a 0.235 M…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: You have 75.0 mL of 0.11 M HA. After adding 30.0 mL of 0.10 M NaOH, the pH is 5.50. What is the Ka…

A: Buffer solution: The solution that resists the change in pH is known as a buffer solution. The…

Q: TOGEL FOLEG HZOZHI ++ Total valence electrons Electron group Arrangement * (see below) Name the…

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Q: Which of the following correctly ranks the substances in terms of increasing boiling point? OA. Xe…

A: correct answer is C. O2 < Xe < H2S < H2O   Explanation:-   1.Very little intermolecular…

Q: CHEMISTRY (Please write the complete solution legibly. Choose the correct answer. No long…

A: To solve this problem, you will need to use the equation for calorimetry:   q = mcΔT   where q is…

Q: An alkyl halide (RX) reacts with (-)OCH3 to give an ether product, R-OCH3. The observed rate law for…

A: Here we are required to find the mechanism by which an alkyl halide reacts with alkoxide to form…

Q: Consider the following mechanism: A + e kf B C B C+eD E- = -0.2 V vs SHE EO 0.6 V vs SHE Now answer…

A: (a) The voltammetry of a solution of C would yield an irreversible reduction peak at a potential of…

Q: For the synthesis of maroon dye, Taylor needs to use a primary amine with a pH between 3.00 and 4.00…

A: Anilinium chloride is a salt of a base (aniline) and a strong acid (HCl). pH of an aqueous solution…

Q: Question 49 Which of the following groups of elements contains a metal, a metalloid and a noble gas?…

A: Metalloids usually have a metallic appearance. However, these substances frequently act in a…

Q: A gaseous mixture with a molar analysis of 20% CO2, 40% CO, and 40% O₂ enters a heat exchanger and…

A: Given , Gaseous mixture of 20 % CO2 , 40 % CO , 40% O2

Q: following reaction? о Select one: A. I B. || I ОН II ОН ОН IV он по това исто ОН "ОН ОН C. IV…

A: KMnO4 is a strong oxidizing agent. It oxidizes alkene.

Q: What is the purpose of percent yield?

A: In the given question, we need to tell about What the percent yield role in a reaction means. The…

Q: Which of the following is not an element? O A. Ammonia O B. Silver O C. Aluminum D. Magnesium O E.…

A: A substance that cannot be broken down into simpler substances by chemical means. An element is…

Q: Define the following 1.Aufbau Principle 2. Hund's Rule 3. Electron Configuration 4.Ground State…

A: Periodic Table - It is also called as periodic table of element in which elements are arranged…

Q: Match the molecule to the description regarding formal charges. You may assume that the nitrogen,…

A: According to octet rule elements having 8 electrons in their outer most shell i.e. valance shell are…

Q: Solid zinc sulfide and solid zinc carbonate are in equilibrium with a solution containing 9.81×10-3…

A: For maintaining this equilibrium, Zinc carbonate should be precipitated out in the form of Zinc…

Q: Write the Lewis structure for the following covalent compounds: Start with the sum of valence…

A: A Lewis Structure is simplified representation of the valence shell electrons in a molecule. It is…

Q: Q1: True or False 1. Oxalate acts as a bidentate ligand in the preparation of Potassium…

A: 1) True 2) True (Boric acid is weak acid) 3) False (brown black ppt. is formed. 4) True (due to…

Q: An old antacid commercial claimed that each tablet of their product could neutralize 47 times its…

A: To determine the number of moles of HCl that a 1.11 g antacid tablet can neutralize, we need to…

Q: Suppose that 40.0 mL of 0.100 M NaOH(aq) is added to 10.0 mL of 0.200 M Cu(NO3)2(aq). (a) Write the…

A: (a) The chemical equation for the precipitation reaction is:   Cu(NO3)2(aq) + 2NaOH(aq) ->…

Q: Consider a hypothetical sparingly soluble salt of the form A(OH)2. A 20.00 mL saturated, purely…

A: The sparingly soluble salt is A(OH)2.

Q: Barium hydroxide. Ba(OH) 2, reacts with HBr according to the following equation. Ba(OH)₂ 171.34…

A:

Q: During electrolysis of copper sulfate solution, the Cu2+ ions are reduced at the _____. a.anode…

A: Answer: In the electrolysis process electrical energy is converted into chemical energy because…

Q: A voltaic cell was constructed based on the two reactions shown below: Reduction half reaction:…

A:

Q: 2 Se2–(aq) + 2 SO32–(aq) + 3 H2O (l) → 2 Se (s) + 6 OH–(aq) + S2O32–(aq) In the reaction above what…

A: In a redox reaction, the oxidation and reduction half-reactions are determined as follows: Oxidation…

Q: A sample of neon gas collected at a pressure of 1.08 atm and a temperature of 9.00 °C is found to…

A: Since you have asked multiple type questions, we will solve only first  questions for you. If you…

Q: Which of the following correctly describe the shape of the molecule or ion?

A: we have to determine the molecule/ion with correct shape

Q: Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing…

A: The question gives a brief discription about aldol condensation reaction. we need to draw a curved…

Q: Calculate the number of milliliters of 0.702 M NaOH required to precipitate all of the Ca²+ ions in…

A: “Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: What is the organic product formed in the following reaction ? :N(CH3)2 I + H-N(CH3)2 II N(CH3)2 III…

A: Option (A) II is the correct answer.

Q: Fe2O3(s) + 2Al(s)Al2O3(s) + 2Fe(s) Using standard thermodynamic data at 298K, calculate the free…

A:

Q: Write a balanced net ionic equation to show why the solubility of ZnCO3 (s) increases in the…

A: The solubility of salt increases when products of the equilibrium increase.

Q: Phosphorus pentachloride, PCIs, a white solid that has a pungent, unpleasant odor, is used as a…

A: mole is equal to weight of substance divide by it's molar mass

Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.