The enthalpy of solution for potassium perchlorate - KCIO4 is +51.04 kJ/mol. How many grams of potassium perchlorate must be added to 300.0 mL of water in order to cool it from 21.0°C to 4.50°C?

Q: 6. When 25.00 ml of a 0.2045 M Na3PO, solution and 50.00 mL of 0.4123 M H&NO, were combined exactly....

A: It is an example of double displacement reaction  We are required to find the mass of Hg3PO4 formed ...

Q: Which of the following describes a real gas better? - gas particles repel each other - all collisi...

A: It's a hypothetical gas that's been proposed to make the computations easier. A theoretical gas made...

Q: i) How many moles of hydrogen in FeSO«'6 H;O are present in one 500-mg tablet of Feosol? Iv) How man...

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Q: Cycloheptatriene (shown below) is non-aromatic because it … (explain your answer) A) does not have ...

A: Highly stable conjugated cyclic compounds that do not give addition reactions and follow the Huckel ...

Q: The figures below represent equilibrium mixtures of reactants and products for 4 different reactions...

A: Higher the product concentration than the reactant concentration then larger the equilibrium constan...

Q: Draw the generalised structure of an amino acid and identify the main features of this type of molec...

A: The mentioned molecule in the given question consists of both acidic(-COOH)  and basic (-NH2) functi...

Q: True or False The density of an organic compound is influenced by the type of chemical bond present...

A: Basically organic comunds are formed by covalent bond . And we know, compounds formed by ionic bonds...

Q: Order the following chemicals from lowest to the highest melting point. • Lead • Carbon dioxide • Ca...

A: Melting point is the temperature at which the solid and liquid of a pure given substance exist in eq...

Q: is urine homogeneous or heterogeneous mixture?

A: A mixture is made of two or more substances that are combined but they are not combined chemically. 

Q: Provide the starting material and reagent to prepare the following product as the exclusive product ...

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Q: It takes 22.5 mL of a 1.25 M KOH stock solution to reach the equivalence point in the titration of 1...

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Q: Part A: For calculations involving gaseous systems, it is important to use the kelvin temperature sc...

A: Part A: Thermometer reading = 221 °C Part B:  Temperature of the gas = 286 K   

Q: (A) Sample Problem: A 12.1 Moles NaOH solution means there are 12.1 moles of NaOH in liter of soluti...

A: QA) Number of grams of NaOH in 12.1 moles of NaOH solution 1 mole NaOH = 40 g NaOH (GMW) 12.1 mol Na...

Q: A student ran the following reaction in the laboratory at 284 K: 2NO(g) + Br2(g) = 2NOBr(g) When she...

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Q: A 32.2 g of titanium bicycle part is added to 75.0g of water in a coffee-cup calorimeter at 50.0 C a...

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Q: What is/are the intermolecular forces that are present between CH4 (methane) molecules? Dipole-dipol...

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Q: A pump is used to circulate hot water in a home heating system. Water enters the well-insulated pump...

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Q: : A 12.1 Moles NaOH solution means there are 12.1 moles of NaOH in liter of solution. Preparation of...

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Q: A Chemistry 20 student performs a diagnostic test on the following substances in solution to determi...

A: Electrolyte The breakdown of a substance into positively and negatively charged particles called ion...

Q: 6. A buffer solution contains 0.1OM benzoic acid (C,H5COOH, Ka = 6.3 x 10) and 0.10M potassium benzo...

A: pH can be calculated by using henderson equation  pH = pka + log (salt/ acid) Pka = - log 6.3 x10-5 ...

Q: What is the entropy when 1.35 moles of CCl₂F₂ vaporize at 25°C? [∆H(vap) = 17.2 kJ/mol at 25°C]

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Q: (2) ethvlbenzene

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Q: 1. What is the pH of a 0.180 M aqueous solution of sodium nitrite, NaNO2? pH = This solution is acid...

A: Since you have posted multiple questions, as per guidelines we will solve only first one for you. He...

Q: 0.500 M Ca(NO3)2 is added to 25.0mL of 0.250 M NaF at 25°C? (Ksp of CaF2 = 5.3 X 10^-9 at 25

A: Solubility equilibrium of CaF2 CaF2(s) <----> Ca2+(aq.) + 2F-(aq.) Condition for precipitation...

Q: Calculate the solubility of KHT (in g/L) when 0.950 g of KHT is dissolved in 25.00mL of water. Type ...

A: Molarity: It is defined as the no. of moles of solute dissolves in 1L of solution.

Q: If treated with strong aqueous acid, what might happen to the molecule? Show the mechanism step by s...

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Q: High pressure liquid chromatography (HPLC) is a method used in chemistry and biochemistry to purity ...

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Q: If treated with strong aqueous acid, what might happen to the molecule? Show the mechanism step by s...

A: In presence of acid,ether hydrolysis takes place.And it converts to alcohol. In above molecule ether...

Q: As the pka of an acid increases, the acid will be: O Stronger O Weaker O Converted to basic solution...

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Q: rate

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Q: Calculate the ionic resonance energy of HCl, given that: χH = 2.2 and χCl = 3.16.

A: Given,  χH = 2.2 and χCl = 3.16

Q: Some vitamins are soluble in water and some are fat soluble. Fats have structures made up of long C-...

A: Fats are of two types - Saturated fats and unsaturated fats. Unsaturated fats contain double bonds a...

Q: Repeat unit Explain why the polymer is appropriate for its use. Include the properties the polymer e...

A: Polymer can be defined as a macromolecule made up of large number of monomers. Monomer is a repeatin...

Q: If treated with strong aqueous acid, what might happen to the molecule? Show the mechanism step by s...

A: Form the given structure, it is clear that there are possibility to get two different products due t...

Q: Question 3 The rate constant for a reaction varies between 0.505 L-mol-1.s-1 at 325°C and 2.45 L-mol...

A: Chemical kinetics can be defined as the branch of chemistry that deals with rates of chemical reacti...

Q: Propose a synthhesis for this molecule using only isobutene as the source of carbons. dey Isobutene ...

A: Detail synthetic scheme is shown below

Q: In an experiment involving the extraction of essential oils from a plant, 7.5 mL of benzene (C6H6, 7...

A: Volume of hexane = 25.00 mL Volume of benzene = 7.5 mL Density of hexane = 0.6594 g/mL Density of be...

Q: A 32.2 g of titanium bicycle part is added to 75.0g of water in a coffee-cup calorimeter at 50.0 C a...

A: Given measurements, Mass of Ti = 32.2 g mass of water = 75.0 g  Initial temperature of water, T1=50....

Q: What is the concentration of a solution formed by diluting 190 mL of 2.9 M NaOH solution to 0.65 L?

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Q: 5. When 5.20 grams of nitrogen gas reacts with 7.15 grams of magnesium (MM of Mg-24.305; N-14.01) a....

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Q: Mg(s) + 2H2O(l) = Mg(OH)2(aq) + H2(g) What is the concentration of hydroxide ions in the solution f...

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Q: Explain how you determine the mass of CaCl2 (Ksp = 3.7 x 108) that is w licsolve in 35 Lof 0 100M HC...

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Q: (BFN = (8)F0÷ + (3%OS= (3FOS NO(g) 50(g) AH° = -90.2 kJ (a) (b) AH° = +98.9 kJ Using Le Chatelier's ...

A: Exothermic reaction are those in which heat is released and endothermic reaction are those in which ...

Q: Determine the molar solubility for Agl by constructing an ICE table, writing the solubility constant...

A: Answer: AgI is a sparingly soluble salt in water, therefore it is always assumed that all the dissol...

Q: e For each compound label the proton or set of protons that gives the signal at the highest chemical...

A: NMR spectroscopy is branch of chemistry in which we deal with shielding and deshielding effect on pr...

Q: The n and I quantum numbers plus number of nodes in the following radial solution of the Schroedinge...

A: Quantum numbers are those which tell us location of electron in shell, subshell and orbital. 

Q: Flask A: CO2 at 760 torr and 4.0 degrees C Flask B: NO at 430 torr and 4.0 degrees C In which flas...

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Q: If 98%= 18.1 M (molarity) Find the corresponding molarity of the given %HCI solution: a) 61% b) 52.4...

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Q: When Cr(III) is oxidized to Cr(VI), its solubility, mobility and toxicity are dramatically increased...

A: The solution of the question is given below:

Q: Part 2. Determination of Orbital Hybridization. Determine the hybridization of carbon atoms in the f...

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