Dissolving 28 g of an unknown into 100 g of water lowered the freezing point fro 0.0 C to - 3.8 C. What is the molar mass of the unknown ? Kf of water = 1.86. 121 g/mol 96 g/mol 109 g/mol 137 g/mol

Q: The reaction of methane with water to form carbon dioxide and hydrogen is non- spontaneous at 298 K....

A: To become the spontaneous reaction it must have change in Gibbs free energy negative. In order to do...

Q: Consider a decomposition reaction that occurs via the following balanced chemical equation: AB2 АВ T...

A: Since you have posted two questions as per guidelines we can answer one per session . If you want re...

Q: initial type solution initial components (check all that apply) effect of change on pH (check one) c...

A:

Q: At 500°C, and in the presence of a catalyst, steam (water vapour) reacts with carbon to give a mixtu...

A: Given: Steam reacts with carbon to give hydrogen and carbon monoxide. Initial temperature = 500 oC =...

Q: At a certain temperature, 0.600 mol SO, is placed in a 1.50 L container. 2 SO, (g) = 2 SO,(g) + O,(g...

A: For the above equation Kc can be calculated as

Q: To determine the amount of a hypothetical compound KHA · H2A 2H2O in a pure sample, Senku asked his ...

A: The compound KHA.H2A.2H2A has a total of 3 protons(H+). Hence it is a triprotic acid. #(a): Given th...

Q: Why is ethane a nonpolar covalent bond?

A: it is true that ethane is nonpolar , first polarity arises due to difference in electronegativities ...

Q: What compounds are always formed during a neutralization reaction.

A:

Q: A solution contains naphthalene (C10H8 MM: 128.164 g/mol) dissolved in hexane (C6H14 MM: 86.172 g/mo...

A: Given, A solution contains naphthalene (C10H8 MM: 128.164 g/mol) dissolved in hexane (C6H14 MM: 86.1...

Q: Why does the temperature remain constant during a phase change? The heat added during a phase change...

A: Given that : We have to identify the reason why the temperature remain constant during a phase chang...

Q: Solution 10% w/v solution of NaCl means that. O 10 gm of NaCl in 1000 ml of solution. O 100 gm of Na...

A: The correct answer about 10%W/V Nacl solution is given below  

Q: 1. Determine whether each of the molecules is aromatic, nonaromatic, or antiaromatic.

A: Aromatic Compound ::  Cyclic structure, conjugated π electron cloud, plannar and ( 4n + 2) π electro...

Q: Alcohols can act either as weak acid or as weak base, just as water can. Show the reaction of methan...

A: Alcohols can act either as weak acid or as weak base, just as water can.

Q: Calculate the normality of sulfuric acid has a density of 1.84 g/cm3 and is 95.0% (w/w) H2SO4. Mwt f...

A:

Q: What is the equivalent weight of the vehicle?

A: below.

Q: (Q74) At what temperature (in °C) will a solution in which 88.37 grams of iron (III) chloride has be...

A: Boiling point is the temperature at which vapour pressure of liquid become equal to atmospheric pres...

Q: Discuss why water molecule has a high boiling temperature compared to other similar compounds such a...

A:

Q: Direction: Identify the given substances if it is polar or nonpolar, and which type of intermolecula...

A: 1.H-F is a polar molecule and have dipole dipole forces   2. CH3-CH2-CH3 is a non polar molecule and...

Q: Are roots organs or organ systems

A: The plant tissues form organs like leaves, stems, or roots, each of which performs a specific set of...

Q: Br -OK ELOH 3.

A: Note:According to our guidelines we are supposed to answer only one question. Kindly repost other pa...

Q: It is determined that the equilibrium concentrations of F e3+, SCN- and [F e SCN2+] are 5.00 x 10-4 ...

A:

Q: A sample of a potential pharmaceutical is being tested for effectiveness at different dosages. 250. ...

A:

Q: 230 BTUs are absorbed by a gas while the gas expands and perform 610 BTUs of work. Calculate the cha...

A: Given: Heat absorbed by the gas = 230 BTUs  And the amount of work done by the gas = 610 BTUs.  

Q: 2. Mention the IUPAC name of the following compounds. b) а) d) e) f) OH ZI

A: The IUPAC name of the following compounds are:  

Q: 3. If 50.00 mL of 1.00 M HC,H,O, (K, = 1.8 x 105) is titrated with 1.00 M NAOH. What is the pH of th...

A: In this question , we are given a weak acid ( acetic acid ) and it is titrated with a strong base ( ...

Q: Using the thermodynamic information in the ALEKS Data tab, calculate the standard reaction free ener...

A:

Q: 7.00 mL of 5.00 x 10-3 M Fe(NO3)3 (5.00 times 10 to the minus 3rd power M F e (NO3)3) is added to 7....

A:

Q: How many grams of glucose are needed to prepare 400. mL of a 2.0%(m/v) glucose solution?

A: The amount of glucose needed to prepare 2%(m/v) glucose solution is given below

Q: А. 3-methylpentane, considering rotation about the C-2, C-3 bond. 3-methylhexane, considering rotati...

A: Here, we have to draw the most stable conformers of 3-methylpentane and 3-methylhexane.

Q: Calculate the equilibrium constant in terms of pressure (Kp) for the following reaction. N,(g) + 3H,...

A: Write equilibrium constant of the given above reaction---

Q: Sample Problem X. Percentage mass weight by volume and sample preparation Calculate the % w/v of 623...

A: Given: Mass of casein = 623 mg The volume of solution = 15.0 mL

Q: Dw many structural isomers are possible for a monochlorinated PCB molecule (a CB with one Cl atomsub...

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Q: Lithium chloride (LiCl) has a lattice energy of -834.0 kJ/mol and a heat of hydration of –871.0 kJ/m...

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Q: What volume of solution is required to create a 0.15 M solution that contains 0.750 moles? O 0.60 L ...

A:

Q: 11. Given the following galvanic cell, calculate the potential of the cell at 298 K Pb | Pb+2 (0.139...

A:

Q: Consider the reaction. 2 A(g) = B(g) Kp = = 2.48 x 10-5 at 500 K If a sample of A(g) at 2.50 atm is ...

A:

Q: I need the answer as soon as possible

A: In volumetric titration means the method in which we have to find out the concentration of analyte u...

Q: Which one hardness type that remain after boiling process. O Temporary hardness. O Permanent hardnes...

A:

Q: what are the differences of pi and sigma bond

A: A chemical bond is attraction between ions, atoms or molecules that result in formation of chemical ...

Q: Ammonia (NH3) decomposes to form nitrogen gas and hydrogen gas with an enthalpy of 89.4kJ/mol. A clo...

A: Given : We have to write the balanced chemical reaction.

Q: A solution of H2SO4 containing 50.0% H2SO4 by mass has a density of 1.40 g/mL. Express its concentra...

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Q: How many 1H NMR signals/shifts will the following molecule produce? [Note: enter a whole digit integ...

A: The chemically similar protons produce single nmr peak whereas chemically different peaks produce di...

Q: y grams of

A: Since you have asked multiple questions, we will solve the first question for you. If you want any s...

Q: Tu X Ta Failed to Log In l View Submission X Gwhat does jutting X 101 Chem10 Question 9 of 29 the co...

A:

Q: It is

A: Equilibrium constant is only dependent of temperature, it does not depend on concentration.

Q: Calculate A,H, A;S', A‚G°, and Kat 298.15 K for the reaction below. C(gr.) N2(g) 2 H2(g) CH3NH2(g) +...

A: The reaction given is,  

Q: An element has an atomic number of 35. If an atom of that element is in a form wherein it has a char...

A: The given element has atomic number 35. If the element has -1 charge, it means that there is additio...

Q: 3. If 50.00 mL of 1.00 M HC,H,O, (K, = 1.8 x 105) is titrated with 1.00 M NAOH. What is the pH of th...

A: In this a weak acid ( acetic acid ) is titrated with a strong base ( NaOH) .   a.) When there is 0.0...

Q: ASSESSMENT Look for at least 5 examples of covalent compounds that can be found in nature or used in...

A: When 2 or more elements combine chemically in a fixed mass ratio, the resulting product is called as...

Q: Mechanism of formation of Moclobemide?

A: The given compound is Moclobemide.

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.