Pre-lab question #11: How many grams of NaNO3 would you add to 500 g of H20 to prepare a solution that is 0.500 m in NaNO3?

Q: In the molecule of NH3 , find out i) lone pairs of electron _____________

A: The Lewis structure of ammonia is,

Q: What is the pH of a solution with [H+] = 2.37 x 10-5 ?

A: We know that pH is defined as the -ve log of the concentration of [H+] Here  [H+] = 2.37 x 10-5   

Q: Chemistry (Question - 3)

A: 4KClO3 (s) --- > 3 KClO4 (s) + KCl (s)  Temperature = 25°c = 298 K  ∆H°KClO3 = - 397.7 KJ.mol-1  ...

Q: 1g of water at 373 K is converted into steam at the same temperature. The volume of water becomes 16...

A:

Q: Chemistry Question

A: The percentage yield is computed by dividing the actual yield by the theoretical yield and multiplyi...

Q: Determine the number of valence electrons in SO: and then draw the corresponding Lewis structure (wi...

A: Lewis structure represents the systematic arrangement of atoms around the central atom. Electrons in...

Q: Clearly show your working.  Lead chloride has ksp = 1.7 x10-5 at room temperature.(i)Calculate its s...

A:

Q: What are the [H3O+] and the pH of a propanoic acid– propanoate buffer that consists of 0.35 M CH3CH2...

A: Given Values:

Q: What is the difference between sodium chloride and paraffin wax in terms of conducting electricity i...

A: Answer - Sodium chloride - 1. Sodium chloride is the chemical name for salt. Sodium is an electrolyt...

Q: Draw and name all of the structural isomers of a) pentane and b) hexane.

A: Structural isomers are isomers where the atoms are organized in a different order but have the same ...

Q: .The standard cell potential (Eecell) for the voltaic cell based on the reaction below is V 3Sn4+ (a...

A: The driving force of the electron flow from anode to cathode shows a potential drop in the energy of...

Q: Equations: ΔΗ-Σ (n ΔΗμuas)-Σ (m - ΔΗ.m ts) ΔSΣ (n - ΔSpoass.) -Σ(n- ΔS,ec tum ts) AG = E (n · AGprod...

A: According to Gibb's equation:  = Gibbs free energy    = enthalpy change  = entropy change   T = tem...

Q: 10. The trigylceride (C57H110O6) content of a blood sample is 125 mg in 10.0 mL. What is the molarit...

A: The concentration of the solute in the solution can be evaluated by different means such as the mole...

Q: 1. A buffer solution can be made by mixing equal concentrations of acetic acid and sodium acetate. 2...

A: As per our guidelines I can answer only first question because you have posted multiple questions Bu...

Q: Write the structural formulas for the products of the hydrolysis reaction.

A: Hydrolysis is a type of decomposition reaction where one of the reactants is water; and typically, w...

Q: 6. For the very diluted l solution of an ionic compound K3PO4, the van’t Hoff factor (i) would be ap...

A: 6. Answer - The correct option is (b) = 4 According to the question -  Solution of an ionic compound...

Q: 2. What is produced when an amine reacts with a strong acid such as HCl?       A. An amine and th...

A: Whenever amine react with strong acid like HCl, HBr, HI etc it gives an ammonium salt. R3NH+X- So, O...

Q: Calculate Kp for the following reaction:PCl3 (g) + Cl2 (g) ⇋ PCl5 (g) Kc = 1.67 at 500 K

A:

Q: Hypobromous acid, HOBr, has an acid dissociation constant of 2.5 × 10–9 at 25°C. What is the pOH of ...

A: For a weak acid, we know,[H+] = √(Ka.c)= √ ( 2.5 x 10^-9 x 0.015)= 6.12 x 10^- 6

Q: Write the equilibrium constant expressions for the following reactions and determine the value for t...

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Q: Which statement about electrons is true?(a) Electrons attract one another.(b) Electrons are repelled...

A: Molecules are composed of tiny particles called atoms. Atoms are composed of sub-atomic particles li...

Q: Locate each group of elements on the periodic table and listits group number.(a) alkali metals(b) al...

A: The periodic table is the representation of elements arranged in the order of increasing atomic numb...

Q: 6. Pyridine (P), a pesticide, is a weak base. Calculate the pH of a 0.0030 M solution of this base. ...

A: In the given question we have to calculate the pH of Solution,  the Reaction of weak base,  C5H5N  +...

Q: What is the final concentration when 250mL of a 16.0mol/L nitric acid solution is diluted to 4.5L

A: We would use the molarity equation to solve this problem that is M1V1=M2V2 Now the given value is, M...

Q: . Dilute alcohol shows sharp stretch for OH group while neat alcohol shows broad OH stretch band.

A: Infrared spectroscopy is generally used for functional group determination in organic chemistry. Eve...

Q: In the decay 23 Th →Ra + He identify the mass number (by balancing mass numbers) and 90 the atomic n...

A: We are given an unbalanced nuclear reaction:  

Q: A helium nucleus has two protons and two neutrons. Howmany electrons would it take to equal the mass...

A: ANSWER

Q: 7. Write a Bronsted-Lowry acid-base equation for the reaction between each pair of species. Assume e...

A: According to the Bronsted-Lowry acid-base theory, an acid is that which gives H+ ions and the base i...

Q: Write structures that correspond to the names given. a)cyclohexylethyne

A: The structure of the compound is the arrangement of atoms in space. Various physical and chemical me...

Q: Which type of anhydride is acetic formic anhydride? Give its IUPAC name and chemcal formula.

A: Anhydrides are organic compounds with two acyl groups that are bonded to a single O-atom. Acid anhyd...

Q: Calculate the freezing point of a solution containing 50.0g of NaCl in 5000mL of water, Kf for water...

A: Given data: *Kf of water is 1.86 degrees C/m.  The freezing point is calculated by using the formula...

Q: What atomization systems are in Atomic Fluorescence Spectrometers?

A: Atomization refers to breaking bonds in some substance to obtain its constituent atoms in gas phase

Q: Which statement is TRUE when using melting point (MP) as an index of purity? a. A substance must be ...

A: A substance will melt as temperature rise and will have a constant temperature that will correspond ...

Q: Based on the half-reactions and their respective standard reduction potentials below, which addition...

A: Redox reactions are those in which oxidation and reduction processes occur at the same time. It enta...

Q: The solubility in water of ionic compound X is measured and found to be 28.2 g at 10. °C. Calculate ...

A: Given: Solubility of water in the ionic compound is 28.2 g/L. Mass of saturated solution  = 45.0 g.

Q: Refractive index' is equal to' speed of light in material/speed of light in air .a speed of light in...

A: To define Refractive index.

Q: balance the following chemical equations  HBr(aq) +NH3(aq) → Ba(OH)2(aq) + H3PO4(aq) → HClO4(aq) +M...

A: 1.  HBr(aq) +NH3(aq) → Answer -   HBr(aq) + NH3(aq) → NH4+(aq) + Br–(aq)   2.  Ba(OH)2(aq) + H3PO4(a...

Q: Identify the functional group of the following compounds.

A: The functional groups are the groups attached to a hydrocarbon chain that is responsible for their c...

Q: A biochemist who is studying the properties of certain sulfur (S)–containing compounds in the body w...

A: Periodic table represents the systematic arrangement of elements in which the properties of these re...

Q: Sulfuric acid is a solution of hydrogen sulfate, H2SO4, in water. When concentrated, it is extremely...

A: Given: The volume of the solution, (V)=25.0mL = 0.025 L. The given mass of H2SO4, (m)=44 g. The give...

Q: g at 10. °C. Calculate the volume of mL The solubility in acetonitrile of molecular compound M is me...

A: Density of a compound is equal to the mass of the compound divided by its volume. Write the expressi...

Q: Indicate whether the following represent a reducing sugar or a nonreducing sugar. Fructose       ...

A: ANSWER

Q: What are the different carboxylic acid derivatives? Describe each. What is the specific characterist...

A: Note: Since you have posted multiple independent questions in the same request, we will solve the fi...

Q: Which expected product of the reaction below: CH, H. (CH,),Co (CH,),COH 55°C CH3 CH3 CH OCCH,), CH H...

A: The reagent (CH3)3CO- in the given reaction is a nucleophile. If there is the presence of any leavin...

Q: When ammonia reacts with dinitrogen oxide gas (ΔHf° = 82.05 kJ/mol), liquid water and nitrogen gas a...

A: It is standard enthalpy of formation of compound  It is the change in  enthalpy during formation of ...

Q: Briefly describe the process of Fischer esterification of methyl salicylate.

A: Answer -  Fischer esterification - Fischer Esterification is an organic reaction which is employed t...

Q: Provide names for each compound below.

A: The name of the compound is determined by identifying the number of carbon atoms and functional grou...

Q: A chemist prepares a solution of iron(II) bromide (FeBr,) by measuring out 470. g of iron(II) bromid...

A: Given: mass of FeBr2 = 470 g volume of flask, V=450 mL                             =0.450 L We know ...

Q: d. calculate the standard emf of this cell at 25°C; and e. determine whether the reaction is spontan...

A: The standard reduction potentials of  Esn4+/sn2+ = 0.15 V  E Fe2+/Fe = - 0.41 V   

Q: The nuclide Tl is the daughter nuclide resulting from the α decay of what parent nuclide?

A: The spontaneous process of the breakdown of an unstable heavy atom by emitting radiation is called r...