What is the specific heat of an object that goes from 25.2 Celsius to 31.4 Celsius Celsius when it absorbs 250 calories of heat energy. The object weighs 10.0 grams

Q: For HNO2, Ka = 4.6 x 10-4 and for HSO4-, Ka = 1.2 x 10-2. Which is the stronger acid?

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Q: Select all of the elements that are members of the alkaline earth metals. calcium chlorine strontium...

A: Answers are written below

Q: Which of the structures below are identical? CH3 CH3 CH3 CH,CH,CH,CH3 CH,CHCH3 CH;CHCH,CH3 CH;CCH3 Č...

A: When two structure having same configuration then they are said to be identical.

Q: why are ionic solutions not ideal even at very low concentrations?

A: Answer: Substances made of ions are called as ionic substances.

Q: Below is a diagram showing a typical heating/cooling curve for water. It reveals a wealth of informa...

A: We would use the given heating curve to answer these questions.      Note : As you have uploaded mul...

Q: A student performed an 3. experiment to determine the solubility of KCL The following data was colle...

A: Given: Mass of empty 250-mL beaker = 105.6 g Mass of the 250-mL beaker and the saturated KCI solutio...

Q: The equilibrium constant for the reaction below is K=3.39×105 at 400.0ºC. 2 SO₂ (g) + O₂ (g) ⇄ 2 SO...

A: Use the van't Hoff equation to calculate the value of the equilibrium constant.,

Q: Complete the balanced chemical reaction for the following weak base with a strong acid. In this case...

A: According to Bronsted-lowry concept : An acid is defined as a substance which has a tendency to dona...

Q: Match each element with the charge it will have when it becomes an ion. nitrogen xenon magnesium bro...

A: Write charge when atom present into ion form ?

Q: A solution containing Mg2+ was buffered to pH 9.75 and titrated with EDTA. Eriochrome black T, with ...

A: EBT is used as metal ion indicator.

Q: Calculate the pH when 20.0 mL of 0.150 M KOH is mixed with 47.0 mL of 0.300 M HBrO (Ka = 2.5 × 10⁻⁹)

A: Given -> Volume of KOH = 20.0 ml Molarity of KOH = 0.150 M Volume of HBrO = 47.0 ml Molarity of H...

Q: Gypsum (CaSO4) is one of common precipitants in brackish water desalination processes. CaSO4 ⇋ Ca2+...

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Q: Use the periodic table to arrange the elements given in order from smallest to largest atomic radii....

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Q: An experiment was performed to determine the heat capacity of a coffee cup calorimeter. The calorime...

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Q: 3. There are several methods for preparing alkenes. A Wittig reagent was used in this experiment. Tr...

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Q: 2. How H-NMR is useful to predict the tac-mer isomers of [CoL3] where HL is 8-hydroxy quinoline)? Dr...

A: This Question is based upon H1 NMR SPECTROSCOPY.

Q: A 1.00 L buffer solution is 0.200 mol L-1 in C6H5COOH and 0.250 mol L-1 in C6H5COOLI. The Ka for C6H...

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Q: Which can be used as a precipitating agent for Group 1 cation in the absence of HCl(aq)? HClO? Or Na...

A: Group I (Ag+, Pb2+, Hg2+) cations produce insoluble chlorides so they can be precipitated with dilut...

Q: If the reaction between Fe(N03)3 is endothermic, and the system is cooled, would you expect absorban...

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Q: What is the predicted major product for the reaction shown? Fuming H,SO, ÓCH3 SO;H SO3H SO3H осн ÓCH...

A: ->OCH3 is electron donating group due to +R effect it is ortho ,para directing. ->CH3 is elect...

Q: ssify these structures as bemiacetal, ncetal, or other, Hemiacetal Acetal Other OH HC CH CH3

A: Hemiacetal is formed by the reaction of aldehyde with alcohol .

Q: Describe how you would pick the appropriate chemicals to use to prepare a burtc

A: Buffer solution: The solution that resists the change in pH is known as a buffer solution. The buffe...

Q: Why is it possible to use K2S instead of thioacetamide in precipitating the Group II and Group III c...

A: Thioacetamide is widely used in classical qualitative inorganic analysis as an in situ source for su...

Q: u make 50.00mL of a 0.045M solution of NaOH from a 2.5M stock solution. 9. How many milliliters of t...

A: Answer: As, for the dilution, we add water in the solution, therefore moles of NaOH taken from stock...

Q: The following data were collected at 25°C for the reaction of nitrogen dioxide with ozone which is o...

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Q: What is the formula for iron (II) nitrate? Hint: for CO2, write CO_2

A: To write Formula for iron (II) nitrate:    Symbol of Iron = Fe   Nitrate is a polyatomic ion with mo...

Q: Which of the following equations is balanced? A. 3Mg(s) + N,G) Mg3N2(s) B. 3Mg(s) + 2N,9) 2Mg N2(s) ...

A: When the Magnesium metal (Mg) reacts with the nitrogen which is a non metal then the transferring of...

Q: 100.0 mL of 0.20 M HF (K, = 7.2 x 104is titrated with 5.0 ml of 0.25 M NaOH. Calculate the pH at thi...

A: Henderson–Hasselbalch equation PH = PKa + log [salt]/ [Acid] NaoH is limiting reagent, it will consu...

Q: How many moles of an ideal gas are there if the volume of the gas is 158 L at 14°C and a pressure of...

A: Given :-  Volume of gas = 158 L  Temperature = 14°C  Pressure = 89 kPa  To calculate :-  Number of m...

Q: In one experiment, a 34.9 ml sample of 0.188 M phosphoric acid was titrated with a 0.22 M solution o...

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Q: A student determined that the mass of four pennies was 8.7 grams. Use this information to calculate ...

A: Given :-  No. of pennies in 8.7 g = 4  To calculate :-  No.of pennies in 2.5 pounds   

Q: why very low concentrations? are ionic solutions not ideal even at

A: Ionic solutions : These are the solutions containing ions. Ions are the species which are formed by ...

Q: (a) There are essentially three bonding concepts used to describe the bonding in coordination compou...

A: In valance bond theory, valance electrons of an atom / element/ ion are combine together to form the...

Q: If 29.9 grams of ammonium nitrate react to form 16.4 grams of dinitrogen monoxide, how many grams of...

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Q: hand at room temperature, your hand will become cold. a) Is the 3. Jf vou hold 3 grams of ice in you...

A: The energy difference of the products and reactants is known as the energy change of a reaction.

Q: The formula for ammonium sulfate is (NH4),SO4. Enter it as: (NH_4)_2SO_4 2

A: Given that, Formula of ammonium sulfate = (NH4)2SO4

Q: What is the relationship between absorbance and the shift in equilibrium?

A: According to Le-chatelier's principle, if any type of stress is applied at equilibrium, then equilib...

Q: Provide the IUPAC name for the condensed structural formula shown here. CH2 CH2 CH3 CH2 H3C CH CH2 H...

A: 1. Select the principle carbon chain 2. Numbering 3. Naming (prefix + word root + suffix)

Q: . Calculation of approximate K, for HC,H,O2:

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Q: Examining the crystal structure of CsCl (Caesium Chloride), the Cs+ions form the 8 corners of a cube...

A: The crystal structure of CsCl is given to have Cs+ ions present at the eight corner of the cube whil...

Q: If a system has 5.00×102 kcal5.00×102 kcal of work done to it, and releases 5.00×102 kJ5.00×102 kJ o...

A: Given Data : Work done (w) = 5.00 × 102 kcal heat (q) = 5.00 × 102 kJ  

Q: A mixture of gases is made by connecting a 7.50 L flask containing nitrogen at 2.00 atm to a 13.0 L ...

A: Given,  A mixture of gases is made by connecting a 7.50 L flask containing nitrogen at 2.00 atm to a...

Q: (a) What concentration of Aso, is necessary to begin precipitation? (Neglect volume changes.) [Aso,]...

A:                              [Cu2+] = 0.0835 M                                [Ag+] = 0.000958 M    ...

Q: 3. Which 3-carbon molecule(s) from the following families would you predict to be a gas at room temp...

A: Boiling point: The temperature at which the vapor pressure of a liquid becomes equal to the atmosphe...

Q: A student performed an experiment to determine the percent water in a sample of food and collected t...

A: Given: Mass of empty watch glass = 43.5245 g Mass of watch glass and undried food = 50.6270 g Mass o...

Q: 90. A buffer solution is prepared from equal volumes of 0.200 M acetic acid and 0.600 M sodium aceta...

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Q: . Twenty-five pounds of propane are held in a sealed container at 350 psia. The volume of the contai...

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Q: se the following information to answer this question. CAle) + 3CuClz(ag)→2AICI3(aq) + 3Cu(s) word eq...

A: Given- 2Al+3 CuCl2->2AlCl3+3Cu

Q: How many grams of oxygen are required to react with 25.8 grams of lead sulfide

A: Given, 25.8 grams of lead sulfide reacted with oxygen.

Q: 8. Assume that the following exchangeable cations are present in a 25 gram sample of a soil Cation C...

A: The solution of the question is given below: