Selenium-73 decays by positron emission with a half-life of 7.15 hours. What mass remains from a 50.0 g sample after 24 hours?

Q: Which class of molecules listed below does not allow for hydrogen bonding to occur with carboxylic…

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

Q: 6. What are the possible sets of quantum numbers for the following valence electrons? 3s² 3p¹

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Q: A chemist is studying the following equilibirum, which has the given equilibrium constant at a…

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Q: [Standardization] A 0.3045 g of CaCO3 primary standard was dissolved using concentrated HCI,…

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Q: Electrons are consumed at the positive terminal (electrode). Select one: O True O False Which of the…

A: ->In galvanic cell positive electrode is cathode and there occur reduction that means electrode…

Q: Charcoal samples from Stonehenge in England were burned in the presence of oxygen with the resulting…

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Q: INCREASING pH of their corresponding solutions. a. CaBr2, NaF, C6H5NH3NO3 b. CH3NH3Cl, LiCH3COO,…

A: As we know , For acidic solution pH is less than 7. For basic solution pH is greater than 7 And for…

Q: 1. Provide a systematic name for each molecule represented below and a structure for the one name.…

A: The names of asked molecules are as below ? 1)  6-ethyl-2,5-dimethyl-7-propylundecane 2)…

Q: a steel cylinder is filled with a gas at a temperature of 25.0C and a pressure of 225.0 kPa. what…

A: In the given question we have to calculate the final pressure in the cylinder at 47 °C.  By using…

Q: Which of the following solvent pairs cannot form a miscible solution? O a. and H₂C-OH O b. O c. O d.…

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Q: how many grams of carbon dioxide will be made from 7.4x10 to the 23 power molecules of oxygen?…

A: First convert molecules into moles. 6.022 × 10²³ molecules = 1 mole of oxygen 1 molecules= 1÷6.022 ×…

Q: The first method is through a pH strip. To estimate the pH of the sample, Tricia used a pH strip.…

A: In pH strip method, 1 mL of the sample has a pH of 3.3 . Then 1 mL of the same sample was diluted…

Q: 17) The solubility of sodium chloride is 36 grams per 100 grams of water. Which of the following…

A: We will calculate the highest solubility in every given solution. If maximum possible amount of…

Q: A balloon can hold 10 liters of a gas. If you blow up this balloon with 2 moles of oxygen gas at a…

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Q: Consider the following reaction A + 2B + 2C → Products; and its rate formulation: v=k[A][B]² Which…

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Q: A student runs two experiments with a constant-volume "bomb" calorimeter containing 1300. g of water…

A: The combustion reaction of ethylene in excess oxygen is: C2H4(g) + 3O2(g) ----> 2CO2(g) + 2H2O(l)…

Q: A chemist prepared a reagent blank and 6 Fe standards with the following concentrations: 20, 30, 40,…

A: Here we are required to find the correct equation for calibration curve

Q: The reaction mechanism for Reaction 1 is _____ Choices: A. SN1, B. SN2, C. SN Acyl, D. None of the…

A: In the above given reaction scheme, alkyl halide is first converted to thiol and then it is further…

Q: Which of the following nucleophilic substitution mechanisms would produce a mix of stereoisomeric…

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Q: If the following compound is saponified with sodium hydroxide, the products are: O || CH3(CH2)…

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Q: The standard cell potential (Eºcell) for the voltaic cell based on the reaction below is 35n4+ (aq)…

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Q: Balance this equation for the reaction occurring in an acidic solution. HNO2+ MnO4 →Mn²+ + NO3 HNO₂…

A: Balancing equation means we equal the number of elements on right hand side equal to left hand side

Q: Molecule: CH3Br Activity 1 Valence Electrons Central Atom Multiple bonds (yes or no?) Lewis…

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Q: Y H CN OCH 3 Acidities of Substituted Benzoic and Acetic Acids pKas at 25°C Y-CH₂COOH meta 4.75 4.19…

A: Stronger the acid weaker the conjugate base Lower the pKa stronger the acid

Q: in a 63.17 gram sample of sulfur trioxide, how much of it is sulfur?

A: The correct answer is given below

Q: Criven Dome molecule in which the strongest intermotecalar farce wok that who exists at pH 7.4…

A: This question has multiple parts. I am allowed to answer three sub parts of one question at a time.…

Q: Balance equation between cisplatin and guanine

A: When cis platin react with guanine ,first solvato complex is formed (solvent as ligand )

Q: In Which of the following is always TRUE for a reaction whose value of Kc is 4.4 × 10-18? A. The…

A: Equilibrium constant is the ratio of concentration of products to concentration of reactants at…

Q: What is the volume in liters of 13.7 mol of krypton gas at STP?

A: We have to calculate the volume in liters of 13.7 mol of krypton gas at STP

Q: 35 mg/l of Chlorine is required to treat a flow of 55.3 million gallons per day (MGD). The solution…

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Q: (A) reaction of chlorine with propane (B) reaction of chlorine with propene reaction of thionyl…

A: Which one of the following is correct

Q: (Q100) The diameter of a titanium-46 nuclide is 7.214 fm (1 fm = 10-15). Given that the mass of…

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Q: ROH, ArOH, and ROR' are all unreactive making them good reaction solvents.  True or False   Thiols…

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Q: The following carbohydrate tests have been performed on a sample containing an unknown sugar.…

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Q: Which one of the following equations is incorrect? OH CH3CH₂CH₂OH Cr₂O7² H₂SO4 CH3CH₂C=0 a) OH H 1…

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Q: Equation given:  AuBr(s) + 2 CN– (aq) ⇄ [Au(CN)2]– (aq) + Br– (aq)       Keq = 2.02 x 1033  Ksp for…

A: Given-> AuBr(s) + 2CN-(aq) <------> [Au(CN)2]-(aq) + Br-(aq) Keq = 2.02 × 1033 Ksp(AuBr) =…

Q: A radioactive element decays at such a rate that after 15 minutes, only 1/10 of the original amount…

A: Radioactive elements are made up of atoms whose nuclei are unstable and gives of atomic radiation as…

Q: what is the molar mass of Iron (lll) nitrate in g/mol?

A: In the given question we have write molar mass of Iron (lll) nitrate in g/mol  there are two types…

Q: What is the common name of the ether that has the structure shown? -O-CH3

A: The common name of the above compound is given below

Q: Based on the general procedure for this reaction, how much of each reagent is needed to produce the…

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Q: Draw the mechanism of free radical bromination and product (only initiation & Propagation) Br₂ hv

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Q: Nitric acid, HNO3(aq), is an important industrial chemical. Large quantities are required for the…

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Q: OH Reaction 1 Reaction 2

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Q: How to properly use significant figures in this case? Ccal = (-ΔHrxn x nLR)/ΔT Ccal = (-55.85…

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Q: Write down the condensed molecular formula, line and angle structure and full 3-D structures for…

A: Condensed formula: In this, a molecule is the formula where the symbols of atoms are listed in order…

Q: A chemistry student needs 5.00 g of thiophene for an experiment. She has available 1.2 kg of a 7.83%…

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Q: From the experiment, it was found that the external pressure was 1.05 atm at 30.0 °C, and the volume…

A: Metal reacts with acid to given Hydrogen gas.  To calculate the pressure of dry air , pressure of…

Q: Give the IUPAC name of these compounds

A: "To get remaining sub-parts solved please repost the complete question and mention the sub-parts to…

Q: A student performed the Fischer Esterification reaction shown below and quenched their reaction…

A: In Fischer esterification reaction carboxylic acid react with alcohol to give ester Sodium…

Q: The arrow points to a particular carbon atom that carries an H atom or group of H atoms. This/these…

A: In this question, we will see that appearing of hydrogens in proton NMR spectra as a singlet,…

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.