Put some crushed ice in the 400 mL beaker. Allow some of the ice to melt then take the temperature. Record this as temperature of the ice. Temperature reading is 0.00°C Prepare accurately 20 % urea solution (2 grams urea in 8 grams distilled water). Place this solution in a hard glass test tube then place it in the beaker with crushed ice. Get the temperature of the urea solution at interval of 30 seconds. The temperature will go down until

Q: A sample of Nitrogen gas occupies a volume of 375.5 mL at 77.8°C. What volume will it occupy at 26°C...

A: Volume occupied by Nitrogen gas at 77.8°C (T1) = 375.5ml = V1 Volume occupied by Nitrogen gas at 26°...

Q: Mechanism 1. Propose a mechanism that accounts for the transformation below. TSOH, EIOH EtO mechanis...

A: This reaction proceeds through SN2 mechanism.

Q: A balloon with a volume of 30,3 L at 91 psi is allowed to expand into a larger can with a total volu...

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Q: A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas rea...

A: To calculate the value of maximum safe operating temperature , we would use ideal gas law. 

Q: Which of the following contains the most lattice energy? a) b) c) d) KCI BaCl CaS Na20

A: Answer: Lattice energy is the amount of energy gets released during the formation of 1 mole of solid...

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Q: 1. (5 marks) In one process, 124 g of C,Hs are reacted with 480 g of O2. C,Hs + O2→ CO + H;0 Molar m...

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Q: What is the mass, in grams, of 9.88 x 1024 molecules of methanol (CH, OH) ? 50.3 mass: Incorrect

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Q: 1. Give an acceptable (common or systematic name to the following compounds (a) 2-ethyl-6-me thil-4-...

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

Q: How much energy is needed to heat 15.0 g of water (18.02 g/mol) from 30.0 to 50.0 °C?  Potentially u...

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Q: Draw the major product of this reaction. Ignore inorganic byproducts. 1. CH3MGB (excess) 2. H2O Sele...

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Q: Determine the maximum allowable spacing s of the nails used to hold the top flange to the web. e bea...

A: Question is solved below 

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Q: For the molecule shown below, please answer the following questions. Enter only numerals (e.g. "1") ...

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Q: The heat of combustion of acetylene, F2H2(g) + O2(g) → CO2(g) + H20(g) A „H° = -1300 kJ mol*1 %3D (a...

A: Heat absorbed, q = m × c × ∆ T  mass of water, m = 2.292 kg or 2292 g  Initial temperature , T1 = 24...

Q: 1. What is the molality of a solution labeled "8.6% glucose (C6H12O6) by weight?" (Note: If the ques...

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Q: The element which causes the greatest polarity within an organic molecule is ___.     oxygen     ...

A: The covalent bond is formed by the sharing of electrons between the atoms.

Q: Calculate the molal concentration of a solution of 44.9 g of naphthalene, C10H8, in 175 g of benzene...

A: Please find your solution below : Molality is a measure of concentration which is defined as the num...

Q: 2022 HE 231SP 2022 1. Give an açceptable (common or systematic name to the following compounds: (a) ...

A:    

Q: While ethanol (CH,CH,OH) is produced naturally by fermentation, e.g. in beer- and wine-making, indus...

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Q: what is the molecular, ionic and net ionic equation of sodium nitrate and sulfuric acid

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Q: How do you solve the hydrogenic wave functions for HF?

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Q: Some N, gas is mixed with some O, gas, and the sketch below shows a representative sample of the mix...

A: To calculate mole fractions, we would consider the given molecules as a mole and count moles of both...

Q: Question 15 Coprecipitation that involves foreign particles? O Surface adsorption O Inclusion Mechan...

A: As per the company guidelines, we are authorised to solve only one question at a time.  Please post ...

Q: A gas occupies 27.0 mL at 23.0⁰C, what volume( in mL ) does the gas occupy at -43.0⁰C?

A: Charles's law states that the volume of a gas is directly proportional to its absolute temperature. ...

Q: The atom with the highest second ionization energy is c) Al a) Na b) Mg d) S

A:

Q: 19. Select the correct electron configuration of Fe a) b) c) d) [Ar]4s² 3d [Ar]4s2 4d [Ar] 3ď [Ar] 4...

A: • We need to determine the correct condensed electronic configuration of Fe 

Q: .. Identify the MAJOR product(s) that would be obtained from the following reaction. HBr Me Br (1:1 ...

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Q: Paraformaldehyde is a polymer of    A. acetone   B. paraform    C. formaldehyde    D. acetal...

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Q: Question 2: Explain the 'H-NMR spectrum generated for 1,3-dichloropropane would differ compared to t...

A: We have to compare the 1H NMR spectrum of 1,3-dichloropropane and 1,2-dichloropropane.

Q: A container of gas is initially at 0.64 atm and 25 °C. What will the pressure be at 92.6 °C?

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Q: A sample of gas occupies 36.1 mL at a pressure of 656.5 torr. What is the new volume if the pressur...

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Q: Convert 0.19 moles of carbon dioxide to grams of CO2.

A: Answer: This is question based on mole concept where each mole of the substance has a fixed mass cal...

Q: iron ( s ) + chlorine ( g ) ---> iron(III) chloride ( s ) How many grams of iron are needed to comp...

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Q: Graph Analysis Individual Assessment Provide clear and concise explanation for each of the question ...

A: BC (2) and DE (4) represent phase transition of the system.

Q: 25 g15 ons d a -5 Energy |Temperaore °C

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Q: Calculate the mass of forsterite (Mg, SiO,) that contains a million (1.000 x 10°) magnesium atoms. B...

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Q: Problem 2: Show the fragmentations for4-methyl-2-pentanone radical carbocati on and eplain why thàti...

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Q: Calculate the pH of an 0.025 M solution of HF. HF is a weak acid Ka = 0.00071

A: The PH of weak acids can be calculated as follows

Q: If a 750 mL sample of drinking water has lead concentration of 28 ppm, how many grams of lead are in...

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Q: initial change equilibrium

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Q: Which IR band is most likely to result from this structure? A) 3020-3100 cm1, Medium B) 2850-2960, M...

A: IR spectroscopy.

Q: c) Outline a synthesis for compound G shown below starting with a 2- hydroxybenzylketone. G

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Q: Suppose a 250. mL flask is filled with 1.8 mol of H, and 2.0 mol of NH,. This reaction becomes possi...

A: The solution is provided.

Q: If you have 155 mL solution of a 0.762 M FeCl3 solution, how many moles of FeCl3 are contained in th...

A: 0.762 M means 0.762 moles/liter and since there are 0.155 liters (155ml/1000 ml/l = 0.155 L) then th...

Q: Aqueous hydrochloric acid (HCI) reacts with solid sodium hydroxide (NaOH) to produce aqueous sodium ...

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Q: After completing part II of the experiment, a student uses her calibration curve to find that the eq...

A: We would first write a reaction between Fe3+ and SCN- to form product [FeNCS2+]  , then we would dra...

Q: Given that the Ka of a monoprotic acid HA is 3.20 x 10, and the acid HA concentration is 0.751 M, fi...

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Q: A chemist does an experiment where he expects to produce 6.669 moles of calcium phosphate, Ca3(PO4)2...

A:

Q: How much crystalline sugar (10% moisture content by weight) must be added to 35 litres of 10.5° Brix...

A:                             Volume of apple juice = 35 L                                        Spec...