How many milligrams of solid MgCl2 (formula weight: 95.211 g/mole) are required to prepare 150 mL of a 500nM solution?

Q: Elements A and Q form two compounds. The ratio (mass Q)/(mass A) for compound one is 0.271 and ratio…

A: Given  Elements A and Q form two compounds. The ratio (mass Q)/(mass A) for compound one = 0.271…

Q: A gas mixture contains 3 ppmv of CO₂. At 25C and latm, determine the μα concentration of CO₂ in

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Q: 1. Which of the following will give the lowest freezing point when added to 1 kg of water: 1 mol of…

A: Data given:  Number of moles of Co(C2H3O2)2 = 1 mol  Number of moles of KCl = 2 mol  Number of moles…

Q: What is the major organic product obtained from the following reaction? 4 1 3 N W 2 OH PB13 PB₂

A: we have to predict the major organic product of the given reaction

Q: What are the molecular and empirical chemical formulas of a compound made up of these molecules? :0:…

A: 1. Molecule formula represent actual number of atom of each element  in a molecule.  2. While…

Q: Rel. Intensity 100 80 60 40 20 0.0 0.0 40 MASS SPECTRUM 80 m/z 111 112 120 199 141 104 m/z 141 154…

A: Base peak  In mass spectrometry it has highest abundance  Base peak fragment is more stable…

Q: oxygen must have been used by applying the law of conservation of mass?

A: The law of conservation of mass states that the mass of the reactants must be equal to the mass of…

Q: How much heat was absorbed (in J) if a 10.0 g sample of an alloy with a specific heat of 0.107 J/g…

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Q: What force is NOT taken into account in the formation of a covalent bond? a. repulsion between…

A: Carbocation is a species in which carbon is carrying positive charge and carbon atom is sp3…

Q: A ¹H NMR spectrum is shown for a molecule with the molecular formula of CsH10O2. Draw the structure…

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Q: Write the skeletal structure of Ethanol. What is the major intermolecular forever found in this…

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Q: Ammonium phosphate ((NHÂ)¸PO4) is an important ingredient in many fertilizers. It can be made by…

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Q: The molar heat of vaporization of water at 25 °C is +43.9 kJ/mol. How many kilojoules of heat would…

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Q: The amino acid alanine has the Lewis structure shown below. Which electron-pair geometries are…

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Q: structure of caffeine, acetaminophen, acetyl salicylic acid, and ibuprofen. Order them from most…

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Q: Consider the following data on some weak acids and weak bases: name acid solution 0.1 M KCN 0.1 M…

A: pH of a solution is defined as the negative logarithm of Hydrogen ion concentration.  pH = -log(H+)

Q: Which of the following is not a factor that directly affects the viscosity of a liquid?…

A: Viscosity is property or tendency of fluid (gas or liquid) to resistance to the flow . Viscosity is…

Q: Mark each chiral center in the following molecules with an asterisk. How many stereoisomers are…

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Q: From your data in Part 1 of the experiment, you calculate the natural log of the partial pressure of…

A: Given data :

Q: A 100.0 g sample of phenol, CHO, (MW = 94.11 g/mol, Kmp=7.40 °C/molal, MP = 43.0 °C) is contaminated…

A: Given - Mass of phenol = 100.0 g             Mass of sodium chloride = 7.000 g             Molar…

Q: How many grams are in 0.0264 mol of sodium? mass: 0.183 How many grams are in 0.250 mol of nickel?…

A: mole = massmolar mass or mass = mole * molar mass

Q: Calculate the volume of 1 mole of SO₂ at 25°C and 1 atm. Express your answer in m³.

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Q: Determine the concentration of carbonate ion in water due to solubility limit of limestone (CaCO3).…

A: Solubility product is defined as  the product of the concentration of the ions present in a…

Q: Consider the equilibrium system described by the chemical reaction below. At equilibrium, a 2.0 L…

A: Given Data :

Q: A 30 mL portion of a urine sample contains 1.4 mg of a drug. Find the number of milligrams of the…

A: The amount of drugs can be calculated as:

Q: 3. Using the data at right: a. Calculate the absorbance of each sample. You will need to express the…

A: We need to calculate the absorbance for each standard concentration and then plot the absorbance vs…

Q: Describe how feces affects the food chain and ultimately the food we eat.

A: Food chain: A food chain would be a network of linear linkages in a food web that begins with…

Q: Aqueous sulfuric acid (H₂SO4) will react with solid sodium hydroxide (NaOH) to produce aqueous…

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Q: A local FM radio station broadcasts at a frequency of 89.8 MHz. Calculate the wavelength at which it…

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Q: The vapor pressure of liquid aluminum is 400 mm Hg at 2.59x10³ K. Assuming that its molar heat of…

A: Given data The initial vapor pressure of the liquid aluminium is P1= 400 mm Hg The initial…

Q: What bonds are affected by the following denaturation agents; a) Heat b) Organic solvents c)…

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Q: Enantiomers are a pair of molecules that are mirror images that are non- superimposable. Identify…

A: Answer: Enantiomers are the stereoisomers those are non-superimposable mirror images of each-other.

Q: A. Consider the titration curve below for aspartic acid. Draw the predominant structure(s) at (a) pH…

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Q: What is the IUPAC name for the following molecule? OH Br

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Q: The Kp for the reaction A (g) = 2 B (g) is 0.0660. What is Kp for the reaction 4 B (g) = 2 A (g)? 1…

A: Given data :

Q: Bromine has two abundant isotopes, 79Br (51%) and 81Br (49%) . Chlorine has two abundant isotopes,…

A: A question based on mass spectrum that is to be accomplished.

Q: 1. Provide a structure consistent with the following data: 3H 2H 2.5 ppm 2H 2H 1.5 Mass Spec…

A: 1Hnmr provides the information of the possible proton environments of the unknown compound. Mass…

Q: a.) a scientist is trying to determine the amount of heat they need to apply to a cold sample of…

A: Answer: Water is a crystalline compound and in this question we have to shown its heating process…

Q: The thermal process in which carbon dioxide gas, CO2, changes to solid carbon dioxide is called O a.…

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Q: which of the following represents the greatest volume present 3.4dm3 3412ml 9213cm3 22.9L…

A: This question is related to unit conversion Unit conversion means convert one unit into another…

Q: Macmillan Learning What is the mass, in grams, of 9.84 x 1024 molecules of methanol (CH3OH) ? mass:

A: Given, The given chemical compound is methanol (CH3OH) . The given molecule of the methanol is…

Q: To divide numbers in scientific notation: divide the digit terms and subtract the exponents. (A x…

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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…

Q: Liquid octane (CH₂(CH₂) CH₂ will react with gaseous oxygen (O₂) to produce gaseous carbon dioxide…

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Q: Infrared radiation falls in the wavelength region of 1.00×10-6 to 1.00×10-³ meters. What is the…

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Q: Part I: Hydrocarbon Structures and Names. INSTRUCTIONS: For each row in the table, you are given one…

A: The rules of IUPAC nomenclature are (i) Longest chain rule: The chain containing the principal…

Q: xamine the 4 structures shown below. Part I. Focusing on the carbon-heteroatom bonds (not the C-H…

A: Since you asked specific questions so as per Q&A guidelines of portal I solved first question…

Q: -Draw the tripeptide HIS at pH= 13. Label each peptide bond.

A: We have to draw the structure of the tripeptide HIS at pH = 13.0 and we have to label the peptide…

Q: What and how many subshells and orbitals are available in the M shell?

A: Total number of electrons that can be accommodated in a shell is determined by principal quantum…

Q: The activation energy for the gas phase decomposition of t-butyl propionate is 164 kJ/mol.…

A: #Q.1: Given activation energy, Ea = 164 kJ.mol-1  Initial state: Temperature, T1 = 530 K Rate…