forensic chemist is given an unknown substance for analysis. It is suspected that the unknown substance might be cocaine (C17H21NO4, molar mass 303 g/mol). To test this hypothesis, the chemist dissolves 0.5 g of the unknown substance in 8.0 g of benzene. The solution freezes at 3.9˚C. The freezing point of pure benzene is 5.5˚C and the freezing point depression constant of benzene is -5.12˚C/m. A.) Assuming that the substance is a nonelectrolyte, what is the molar mass of the unknown substance? B.) Does this matc

Q: A solution is prepared by dissolving 20.2 mL of methanol CH4O in 100 mL of water at 25 °C. The final...

A: We are given:   Volume of methanol, VCH3OH= 20.2 mL Volume of water, VH2O= 100.0 mL Volume of methan...

Q: Why is the concentration of the water neglected in the rate law for the reaction studied in this exp...

A: Generally the terms involved in equilibrium expression should undergo change in their concentration ...

Q: 11. A 101.3-mg sample of an organic compound known to contain Cl is burned in pure O2 and the combus...

A:

Q: Draw a structural diagram for 1-pentanol. - you do not have to consider stereochemistry - you do n...

A:

Q: Fill up the empty boxes with the correct chemical structures. Br OH COH

A: In the given reaction the alkyl halide is converted into an alpha hydroxy carboxylic acid.

Q: 1. SiO2(s) + C(s) Si(s) + CO(g)

A: Given- SiO2(s) + C(s) --> Si(s) + CO(g)  

Q: What is the pH of a buffer made from 0.580 mol of CH₃NH₂ (Kb = 4.4 × 10⁻⁴) and 0.100 mol of CH₃NH₃I?

A: Given- Moles of CH3NH2=0.580mol Moles of CH3NH3I=0.100mol Kb=4.4×10-4

Q: 2. In an attempt to determine the accurate value of the gas constant, R, a student heated a containe...

A: Here 0.25132 g of helium gas present in a container of volume 20dm^3  is heated to 500°c and pressur...

Q: nd on measuring its resistance it is found to be y ohm, w ment if resistance of aqueous solution of ...

A: For cell 1 Resistance(R1) = y ohm Specific conductance(k1)=  = x ohm.cm-1 For cell 2,  Resistance (R...

Q: A chemist adds 0.60 L of a 1.2 mol/L sodium carbonate (Na, CO,) solution to a reaction flask. Calcul...

A: Molarity is a concentration term for a solution. The molarity of the given solution is defined as th...

Q: equilibrium constant

A:

Q: Q2 At 291 K, the equivalent conductivities at infinite dilution of HCI, NaCl and CH3COONA are 369.3,...

A: First we will calculate equivalent conductivity at infinite dilution of CH3COOH. Using degree of dis...

Q: For the reaction CO (g) + H2O (g) → CO2(g) + H2 (g), calculate the following reaction's thermodynami...

A:

Q: What is the quantity of heat (in kJ) associated with cooling 150.3 g of water from 25.60°C to ice at...

A:

Q: What is the pH of a 80.0 mL solution which is 0.25 M in IO¯ and 0.43 M in HIO? The Ka for HIO is 2.3...

A: HIO + H2O ⇔ H3O+ + IO- The concentration of conjugate base, [IO-] = 0.25 M the concentration of acid...

Q: An aqueous solution contains NANO3 and KBr. The bromide ion is precipitated as AgBr by the addition ...

A: An aqueous solution contains NaNO3 and KBr. The bromide ion is precipitated as AgBr by addition of A...

Q: How many grams of lodine should be used in preparing 5000 mL of 1:20 solution?

A: 1:20 means 1 g of Iodine is dissolved in 20 ml. So we have, 20 ml dissolves 1 g Therefore,  1 ml dis...

Q: For the cell: Al | Al+3 || Cu2+ | Cu Calculate E for the cell where [Cu*2] = 0.17 mol/L and = 0.27 m...

A:

Q: Calculate the Mg (OH) 2 content of MOM, 13.2 g of which was dissolved in 55.00 mL of 1.2642 N H2S04 ...

A: Mg(OH)2 is first reacted with H2SO4. The excess H2SO4 is then reacted with NaH.

Q: What piece of equipment should you use in order to obtain the mass of the weighing form? A Top-loadi...

A: A triple beam balance is used to measure mass of the weighing form with precisely. If you want to fi...

Q: Q2 : At 25°C, K = 3.40 x 10-3 S m-1 for 0.00100 M NH4OH. Values of Lo are: NH4C1 = 0.01497, NaOH 0.0...

A:

Q: Determine the major product for the following reaction. Meo-P MeO H.

A:

Q: 9. The % w/w of I- in a 0.2144-g sample was determined by Volhard titration. After adding 50.00 mL o...

A: Volhard method is method used for the determination of halide concentration via back titration metho...

Q: Write the reaction rate expressions for the reaction below in terms of the disappearance of the reac...

A:  

Q: Calculate the pH of a 0.30 mol/L ammonium nitrate (NH4NO3) solution.

A: Given, pH of the ammonium nitrate (NH4NO3)  solution = ? Concentration of ammonium nitrate (NH4NO3) ...

Q: w long

A:

Q: 1. The Chemical structure of 5-Bromo-4-Chloro-1- methylcyclohexene is А. Вr CI В. Вг CI С. Вг Br. D....

A:

Q: Draw curved arrows to show the mechanism for the step of the B-ketoacyl-ACP synthase reaction shown ...

A: In given reaction release of CO2 takes place.

Q: Covalent bonding occurs between nonmetallic elements. True or false?

A: Covalent bond is formed by sharing of electrons. 

Q: Be sure to answer all parts. The reaction of peroxydisulfate ion (S203-) with iodide ion (I ) is S,0...

A:

Q: A diprotic acid has a pKa1 = 3.10 and pka2 = 6.50. What is the pH of a 0.10 M solution of this acid ...

A:

Q: 12. What is the percent yield of CO2 if 15.7 grams of CO, are formed from the reaction of 100.4 g of...

A: 12. Solution - According to the question - Given - Reaction : Fe3O4 + 4CO ----> 3Fe + 4CO2   Mole...

Q: burned in pure 02 and the combustion gases collected in absorbent tubes. The tube used to trap CO2 i...

A: Ans. The conservation of mass requires that all the carbon in the organic compound must be in the CO...

Q: (a) 0.123 M HONH2 (Ko = 1.1 x 108) (b) 0.123 M HONH3CI (c) pure H20 (d) a mixture containing 0.123 M...

A:

Q: Under certain conditions the rate of this reaction is zero order in hydrogen iodide with a rate cons...

A: Given-> 2HI(g) --> H2(g)+ I2(g) Rate constant (K)= 0.0085 M.s^-1 Volume = 2.0 L Millimoles of ...

Q: Which of the following glycosidic linkage is found in maltose? *   A. Glucose (a1-2B) Fructose B. Gl...

A: Glycosidic linkage is the linkage between two monosaccharide units through oxygen atoms with the los...

Q: a It has two starting reactants forming a single product. b. It has three steps. c The third step is...

A: Answer: This diagram is based on collision theory, according to which, to form a product, two molecu...

Q: It was determined that 10.24 mL of 0.205 M HCI was needed to titrate a 5 mL sample of borax solution...

A:

Q: OH F OH

A:

Q: What is the ratio strength (w/v) of a solution made by dissolving 16 tablets, each containing 1.5 g ...

A: Solution - According to the question - Given - w = 1.5 g v = 1250 ml (1.25 L) Formulas =  = w/v  1.5...

Q: *. In the temperature, concentration oc surfaco area were increased in the following scenario, hypot...

A: We know that according to le chatlier principle when we change anything at equilibrium in that case ...

Q: 1-methylcyclobut-1-ene with Cl, in dark conditions 2-methylprop-1-ene with O3, Zn, H;O, H*

A:

Q: (a) When cis-1-bromo-2-methylcyclohexane undergoes an E2 reaction, two products (cycloalkenes) are f...

A:

Q: The rate of a certain reaction is given by the following rate law: rate = k[NO]°[0,] Use this inform...

A: Order of reaction is the power raised to the concentration.

Solutions

Solutions can be considered as homogeneous mixtures which contain two or more than two chemical substances. The chemical substance which is the greater part is defined as solvent. And the chemical substance that is dissolved in a solvent is referred to as solute. Solution chemistry plays an important role in chemistry since it supports many commercial applications of solutions.