TOPIC : HOW VITAMINS AND MINERALS/TRACE ELEMENTS AFFECT HEALTH AND HUMAN BODY

Q: Consider an unknown metal X with a mass of 67.5 g at an initial temperature of 76.1 °C. The metal is…

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Q: Complete the following sequence of reactions TsCl pyridine 0°C (R)-1-deuterioethanol ACON a acétone…

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Q: Draw the Lewis structure for the sulfur trioxide (SO3) molecule. Be sure to include all resonance…

A: Lewis’s structure: Lewis’s bonding theory is based on the octet rule. The Lewis structure is a…

Q: A liquid with density 1010 kg/m³ and viscosity 1.2 mPa.s drains from a building through a commercial…

A: We have to find the power  required.

Q: If a piece of rock that has a volume of 0.73L and a mass of 1524g, what is the density of the rock…

A: Density of a substance is the ratio of mass to its volume.

Q: Does rearrangement undertook in wittig reactions

A: Rearrangement in the organic reaction is the arrangement of any of the groups or atoms of that…

Q: Which of the following percent compositions correspond to H in phosphoric acid? 3.09 % O 3.15% O…

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Q: The equilibrium constant, Kc, for the following reaction is 0.0180 at 698 K. 2HI(g) → H₂(g) + 12 (9)…

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Q: at a given depth in the ocean pressure is 2,261 torr. what is the atmospheric pressure on kPa?

A: Given : pressure = 2261 torr Tip : 1 torr = 0.133322 kPa

Q: Replace the indicated letters with reaction conditions that make the transformations below possible.…

A: Three types of oxidizing agent will be used.    Step by step mechanism.

Q: Explain why at equal concentrations [Fe(CN)6]³ is deep red while [Fe(CN)6] is pale yellow.

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Q: Draw the structure of the product(s) from the reaction below. Br Br Br Excu

A: KOtBu is bulky base. Bulky bases give more “Non-Zaitsev” products due to steric interactions with…

Q: • a balanced chemical equation for the reaction that occurred (you do not need to include notation…

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Q: 8. Determine the pH of a buffer solution made using 100.00mL of 0.750M NH,OH and 200.00mL of 0.500M…

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Q: 6. Consider the pseudo-octahedral complex of Cr³+ shown below, where A and B represent Lewis bases…

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Q: Which of the following is NOT a standard reaction of formation at room temperature? ON₂ (g) + O2(g)…

A: Two questions based on properties of gas. A question based on the temperature of formation of gas…

Q: Because of the toxicity of mercury compounds, mercury(I) chloride is used in antibacterial salves.…

A: The volume of water = 4900 km3 Ksp = 1.5 × 10−18 The reaction for the dissociation of the Hg2Cl2 is…

Q: What are the products obtained (2 stereoisomers A and B) when (Z)-hex-3-ene is treated with Br2 in…

A: During bromination the two Br atoms add anti- to each other For the elimination to occur Br and H at…

Q: Aqueous hydrochloric acid (HCI) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium…

A: Given: The mass of HCl taken = 2.2 g The mass of NaOH taken = 2.1 g We have to find the theoretical…

Q: 5) For the reaction N₂(g) + 2H₂(g) → N₂H4(1), if the percent yield for this reaction is 67.0%, what…

A: Given -> Percent yield= 67.0 %  Weight of nitrogen= 26.57 gm  Weight of hydrogen= 4.65 gm

Q: 33. What reagents in the order written below would accomplish the following transformation? CI A) 1)…

A: 33. We have to answer the following questions. Introduction: SN2 reaction, keto-enol tautomerism.…

Q: For reactions f. and g. below, provide all possible products! f. DO Br DBN

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Q: Friedel-Crafts alkylations almost always give mixture of products but Friedel acylations don't…

A: Friedel-Craft alkylation reaction: When the benzene reacts with an alkyl halide in presence of a…

Q: ) 4.5000 g of a unknown compound is found to contain carbon, hydrogen and oxygen.  When combusted…

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Q: Which phase can be described as "molecules roll around one another"

A: To predict the phase of a substance in which molecules of the substance rolls around one another.

Q: Draw and name the molecular geometry for the nitrite ion. Be sure to use solid and dashed wedge…

A: We need to draw and name the molecular geometry of nitrite ion (NO2-) and use 3D representation of…

Q: Suppose 50.00 mL of 2.0 X 10–6 M T(NO3)3 is added to 50.00 mL of 2.0 X 10–4 M ZIO3. Which of the…

A: The information given is 50.00 mL of 2.0 X 10–6 M T(NO3)3 is added to 50.00 mL of 2.0 X 10–4 M ZIO3…

Q: Solid sodium carbonate is slowly added to 175 mL of a 0.457 M iron (II) chloride solution until the…

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Q: What is the hybridization of a carbon atom in the triple bond of an alkyne? A) sp B) sp² C) sp³ D)…

A: Alkyne have two Sigma and two pie bond.  Due to have two Sigma bond hybridization of carbon atom in…

Q: You are given four solids: CO₂ (dry ice, m.p. = -79 °C), H₂O (m.p.= 0 °C), SiO₂ (silica or sand,…

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Q: A sample has a percent transmittance of 50.0%. What is its absorbance?

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Q: How does the Hinsberg test allow for the distinction of primary, secondary and tertiary amines? Show…

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Q: The ΔG°rxn for this reaction is -107.8 kJ/mol. Given the values for ΔGf°; what is the ΔGf° for…

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Q: The ΔG° of the following reaction is -33 kJ/mol. What is the ΔG (in J) at 348 K if the initial…

A: Check the relation between ∆G and ∆Go first. Then use that relation to find out the value of ∆G.

Q: 1. Draw the structures of all possible isomers for the following complexes. Indicate which isomers…

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Q: 4. For the following reaction, predict the products AND balance the equation. You must show your…

A: unbalanced equation : Na + Cl2 ----> NaCl  balanced equation : 2 Na + Cl2 ----> 2 NaCl

Q: ef 0 H Exhgnol

A: The given reaction describes the condensation reaction of acetone with benzaldehyde producing enone.…

Q: What mass of KCIO3 is needed to make 300.3 g of a 7.29% by mass solution

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Q: Solid calcium bromide is slowly added to 125 mL of a 0.415 M sodium sulfite solution until the…

A: Answer: When the ionic product of a sparingly soluble salt becomes greater than its solubility…

Q: PACITO Complete the table of ion names and symbols (use superscript and subscript notation buttons…

A: Atom is the smallest particle which can not be further divided in to any other particle. In an atom,…

Q: Aspirin is a pain reliever, anti-inflammatory, and fever reducer produced from acetic acid and…

A: The first step in solving this problem is to calculate the number of moles of NaOH that were used in…

Q: The following osmotic pressure data have been obtained for lactate dehydrogenase in two different…

A: Given that: Temperature = 25oC Buffer density = 1.012 g/mL Height of solvent per g/L = 0.183…

Q: To what volume (in mL) must 60.0 mL of 1.75 M HCl be diluted to produce 0.500 M HCl?

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Q: of citrate synthase from pig heart tissue shows a sigmoidal dependenc *In the presence of saturating…

A: In presence of succinyl Coenzyme A, the sigmoidal curve shifted to the right and becomes even more…

Q: An analytical chemist is titrating 195.9 ml. of a 0.3100M sol is 4.89. Calculate the pH of the acid…

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Q: At a given temperature, pressure, and volume, for which of the following gases would be the gas…

A: Answer: Root mean square speed of the gas particle is: vrms=3RTM Here: T is temperature of the gas…

Q: What is the concentration in molarity of an HCl solution if 26.6 ml of a 11.3 M HCI solution is…

A: Given , Initial volume , V1= 26.6 mLInitial concentration , M1= 11.3 MFinal volume , V2=185.1…

Q: Write the equilibrium constant expression for the following reaction.  2SO2 + O2 ----> 2SO3 +198kJ

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Q: 83Sr is a radioactive isotope. What is the most likely mode of radioactive decay for83Sr? and why

A: A question based on nuclear reactions. A radioisotope is prescribed for which the most likely mode…

Q: N To measure the amount of nickel in some industrial waste fluid, an analytical chemist adds 0.190M…

A: Answer: This question is based on quantitative analysis in which we have to find out the type of…