An atom with 15 protons and 18 neutrons would be an isotope of: arsenic Ophosphorus argon sulfur

Q: Question 2 Convert 3.98x107 Gg/in3 to cg/pL. Give your answer to 3 sig. figs. and in scientific…

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Q: To prepare a very dilute solution of K2Cr2O7 (294.18 g/mol), 0.661 g of K2Cr2O7 was transferred to a…

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Q: Evaporating sweat cools the body because evaporation is an endothermic process: H₂O(l) → H₂O(g) A…

A: we have to calculate mass of water that evaporated when body is cooled by 1.20 degree Celsius

Q: Complete the half-reaction equation and classify it as an oxidation or a reduction. (3 marks each)…

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Q: can you please answer question #4 on th picture

A: #4: Net ionic reaction is written by canceling all the spectator ions and keeping only the reactants…

Q: 4. What volume of 2.50 M hydrobromic 2 All acid solution will be consumed in reacting with 30.00 g…

A: Given equation for a reaction between Al and HBr : 2 Al(s) + 6 HBr(aq) ----> 2AlBr3(aq) + 3 H2(g)…

Q: Each step in the following process has a yield of 60.0%. CH₂ +4Cl₂ ⇒ CCI₂ + 4HCI CCI + 2 HF →→…

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Q: A student performed three KHP titrations in Part 1 in order to standardize their NaOH solution. They…

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Q: Experiment name: Kinetics of the [S208]2- (Peroxodisulfate(VI) ion) - I (lodine) reaction by the…

A: A traditional chemical clock demonstration experiment to show chemical kinetics in action is the…

Q: How many grams of AgNO3 are in 45.0 mL of a 0.693 M solution?

A: Given  Volume of Solution = 45.0 mL  Molarity of solution = 0.693 M  Molar mass of AgNO3 = 169.87…

Q: The net reaction for sucrose formation in photosynthesis can be written 12 CO2(g) + 11 H2O(l) -->…

A: #(a): The balanced equation is: 12CO2(g) + 11H2O(l) → C12H22O11(s) + 12O2(g) ; ∆rxnHo = ??

Q: How much heat (in kJ) is required to vaporize 3.86-g ice cube at -20 °C? The heat of fusion of ice…

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Q: 20 ml of 1M NaOH solution and 20 ml of 1M HCl solution both at room temperature were made to react…

A: This problem is based on heat of neutralization of acids and bases. We know that when 1gram…

Q: Determine the radius "r" of an impurity atom that will just fit into a tetrahedral site of BCC iron…

A: Given, Iron has BCC crystal structure

Q: Consider the following three statements about neutralisation reactions: I. A neutralisation reaction…

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Q: 2. Dr. Dahm is attempting to bring home some balloons for his son. He attempts to do this in August…

A: Given that, At initial, Temperature = 98 °F Volume = 1.54 L  Let Pressure = P Torr And T final…

Q: For a 8.40×10-² M solution of H₂CO3, calculate both the pH and the CO3²- ion concentration. H₂CO3 +…

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Q: Consider the balanced equation for the reaction of aluminum with hydrochloric acid.…

A: Given :-  2Al + 6HCl → 2AlCl3 + 3H2  Mass of Al = 5.00 g  To be calculated :-  Mass of HCl needed

Q: Describe the preparation of 500mL, 2M aqueous solution of hydrochloric acid (HCl) from a liter stock…

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Q: 8. Draw the Fischer projection of the following compound. Br Br Ans: von Phone

A: “Since you have posted a multiple question, we will solve the first question for you. To get the…

Q: What is the mass percent of water in NISO 4 H₂O?

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Q: Determine the molar mass of Al(NO3)3⋅9H2O.

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Q: 1. The cathode in a galvanic and electrolytic cells is: negative in certain type of cells the site…

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Q: What is the mass in grams of KBr in 0.400 L of a 0.350M solution?

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Q: A reaction can take place and a new bond is formed when an electron rich species attacks an electron…

A: In the given molecular orbital diagram, RO- is the electron rich species acting as nucleophile and…

Q: The pH of a basic solution is 12.99. What is [H⁺]?

A: The value of [H+] is = 1.023 x 10-13 M

Q: Cs+ and I- Express your answer as a chemical formula.

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Q: Titration #1 Titration #2 Titration #3 The concentration of NaOH (M) 0.9554 0.9540 0.9551 Using the…

A: According to question, concentrations of NaOH in 3 trial of titration,  c1= 0.9554 M c2 = 0.9540 M…

Q: Write the empirical formula for at least four ionic compounds that could be formed from the…

A: A compound is formed by the electrostatic interaction between the cation and the anion. The cation…

Q: Arrange the following compounds in order of increasing solubility in water and briefl explain your…

A: Solubility refers to dissolution of a compound in a solvent. Alkyl halides are compounds which has…

Q: Looking up one snowy afternoon from a book titled The Moral Case Against Turning Lead Into Gold (Or…

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Q: light corresponding to the lowest energy pure vibrational and pure rotational transitions. In what…

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Q: For the general reaction shown below the average rate of disappearance of the reactant "A" over the…

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Q: What is the ratio of [A] / [HA] for a buffer solution of HA with a pH of 7 if the pka = 5 for HA? O…

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Q: D Question 9 Which of the following compounds are amphoteric? Select all that apply. OH₂C₂O4 H₂O…

A: Since you have asked multiple questions we will solve the first question for you if you want any…

Q: Acetaminophen Shown here is one possible synthetic pathway: Part 1 Reagent(s) NO₂ + acid B. Part 2…

A: Solution: We know nitro group is an electron withdrawing group. Ao for substitution reaction it must…

Q: Draw the molecular orbital energy diagram (like we did in class, not the fancy general chemistry…

A: In the given compound, NH3 acts as the nucleophile in which the HUMO is nonbonding n orbitals. The…

Q: Calculate pressure using Dalton's law of partial pressures. A gas mixture is made up of CH4 (4.29…

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Q: Br h. -CH3 i. H₂C Br CH 'CH Cl CH₂CH3

A: Answer:- This question is answered by using the simple concept of nomenclature of organic compounds…

Q: The following graph shows the pH curve for the titration of 25 mL of a 0.1 M monoprotic acid…

A: Answer: Volume of base at which complete neutralization of acid would take place will be called as…

Q: Calculate the moles of Fe in 3.84x1022 atoms of Fe.

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Q: Which of the following accurately shows the curved arrows for an E2 reaction? (A) (C) H (B) (D) H

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Q: The electron in the hydrogen atom moves from the n = 3 to the n = 1 state. What is the energy of the…

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Q: A 32.1 g iron rod, initially at 21.5 °C, is submerged into an unknown mass of water at 63.5 °C, in…

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Q: Consider the balanced reaction of magnesium and oxygen.   2Mg+O2⟶2MgO   What mass, in grams, of…

A: This question is related to stoichiometry. Given, mass of Mg = 1.61g mass of O2 = 2.75g It is asked…

Q: Why is total pressure at equilibrium less than initial total pressure for: 2 SO2 (g) + O2 (g)  2…

A: Sulfur dioxide reacts with oxygen to form sulfur trioxide. The equation for the balanced chemical…

Q: Q.3 A neutral atom has a mass number of 80 and has 45 neutrons. Write its complete symbol. Q.4 An…

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Q: 5. Determine if the following are examples of absorption and/or emission of light. a. A handheld…

A: Answer is given below

Q: Draw beaker drawings for : HI, a strong acid CaBr2

A: HI is strong acid hence 100% ionizes in water. So HI ionizes to H+ and I- ions CaBr2 is salt of…

Q: You need a 35% alcohol solution. On hand, you have a 60 mL of a 25% alcohol mixture. You also have…

A: Given, 25% alcohol mixture = 60 mL  Desired alcohol solution= 35%  We have to calculate how much of…

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.