Determine the molality of a 16-g urea dissolved in 39 grams of water. The molar mass of urea is 60.0 g/mol.

Q: Calculate the equilibrium concentration of HC204 in a 0.20 mol L-1 solution of oxalic acid. Express ...

A: Given data, molarity of oxalic acid= 0.20 M  Ka of oxalic acid= 5.37 *10-2 

Q: The combustion of octane (C8H18) gas. The combustion of decane (C10H22) gas.

A: According to the Law of conservation of mass " all atoms of different elements must be equal on both...

Q: What is the correct IUPAC name for the following compound?   Group of answer choices 3,3-diethyl-6-...

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Q: If keq= 1.45 at 298.15 K and X has a starting concentration of 8.0mM (and no Y) what is the final co...

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Q: Wine goes bad soon after opening because the ethanol (CH,CH,OH) dissolved in it reacts with oxygen (...

A: Given :-  ethanol + oxygen → acetic acid + water  no. of moles of ethanol = 2.1 mol  To calculate :-...

Q: A balloon containing 2.99 g of water at 0.909 atm and 400.45 K has volume of 5743 mL. Based on this ...

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Q: The value of the equilibrium constant for the following reaction is 224 at a given temperature:     ...

A: We have to predict the equilibrium constant for given reaction.  

Q: Using the AH; for SO3(g) and SO2lg) calculate AH° for the following reaction: SO SO2(g) +1/202(g) AH...

A: Calculate enthalpy of the given reaction---

Q: at equilibrium.

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Q: The instructions are to 1. list the functional group that differentiates benzhydrol from biphenyl ...

A: Functional group is an atom or a group of atoms that defines the chemical reactivity of a compound. 

Q: ) Classify the following compound as being aromatic, nonaromatic or antiaromatic `N" a) aromatic b) ...

A: The classification of the compound is given below

Q: Consider an ideal gas with an absolute temperature of T1. To what temperature would the gas need to ...

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Q: Starting with SEVEN TONS of the ore of pitchblende, Pierre and Marie Curie isolated a few milligrams...

A: Polonium-218 is a radioactive element. It can undergo both alpha and beta decay. Alpha decay is a ty...

Q: 1. An electron makes a transition from the n = 3 → n = 2 energy level in a magnesium atom. Which of ...

A: The answer is as follows:  

Q: When work is done on a system to bring it into an ordered state which of the following is true? O Th...

A:                                  Answer  when work is done on the system If work is done on the syst...

Q: Limiting Reactant and Percent Yield Worksheet 1. Calcium hydroxide, used to neutralize acid spills, ...

A: Data given from the question, moles of HCl= 6.3 mol  moles of Ca(OH)2= 2.8 mol  then,  

Q: Predict the reactants of this chemical reaction. That is, fill in the left side of the chemical equa...

A: Given :-  ? → Ca(NO2)2(aq) + H2O(l)  To determine :-  reactants through which given products are for...

Q: (CH,(CH.),CH.) (H.). If 7.49 g of water Liquid octane reacts with gaseous oxygen gas (0,) to produce...

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Q: The rate of reaction can be defined as the change in the positive change in the concentration of pro...

A: Rate of reaction is defined as change of rate of  reactant concentrations with respect to time .

Q: Which of the following statements is incorrect? O A. In reversed-phase chromatography, the stationar...

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Q: A 25.0 g block of copper (specific heat capacity 0.380 J/g-°C) at 88.0 °C is placed into 500.0 g of ...

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Q: Why do you think there are tabs in the non-metal atoms

A: Tabs are obtained when there is either gain or loss of electrons to form certain anion and cation no...

Q: Solve clearly and completely with every explanation don't spam or use less information I need it cle...

A: IR spectroscopy works on the principle that molecules absorb specific frequencies that are character...

Q: True or False: One way oxygen can get into the water is oxygen from the atmosphere dissolves and mix...

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Q: Find the empirical formula of the following compounds.  72.4% Fe and 27.6% O

A: Fe = 72.4% O =27.6% We have to find Empirical formula...?

Q: A chemist carefully measures the amount of heat needed to raise the temperature of a 0.91 kg sample ...

A: Mass of the substance = 0.91 kg 1 kg = 1000 g 

Q: Assign oxidation states to all atoms in the following: a. CO2 b. FeS c. SF6 d. NO3-

A: Given :-  a. CO2b. FeSc. SF6d. NO3-  To assign :-  oxidation state to all atoms in given molecules/i...

Q: Calculate the pH after addition of a) 0.00; b) 5.00 mL; c) half-equivalence point vol; d) equivalenc...

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Q: b) What is the heat of reaction for the overall equation? Show your work. c) Which step is the rate ...

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Q: A bond between strontium and oxygen is O ionic O polar covalent O nonpolar covalent

A: A chemical bond is a lasting attraction between atoms, ions or molecules. This bond enables the form...

Q: 14. Acetic acid is a weak acid with the formula CH3COOH; the Ka for acetic acid is 1.76 x 10-5 In a...

A: We have to predict the pH of acid solution.  

Q: thermometer -1 is put into a calorimeter (see sketch at right) that contains 300.0 g of water. The t...

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Q: Caleulate (a) speed, (b) radius and (e) the debroglie wavelength of the electron in the srd Bohr orb...

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Q: ch energy was released by

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Q: If a chemical reaction at STP is carried out in four steps and similar reactic is carried out in one...

A: The problem can be solved by using Hess's law 

Q: For each chemical reaction in the table below, decide whether the highlighted reactant is a Brønsted...

A: For each chemical reaction in the table below, decide whether the highlighted reactant is a Bronsted...

Q: Suppose a 250. mL flask is filled with 1.5 mol of CO, 0.30 mol of H,O and 1.3 mol of H,. The followi...

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Q: rrent Attempt Progress How many grams of water can be heated from 28.0°C to 38.6°C by the heat relea...

A: Given, Mass of copper = 85 .5 g  Specific heat of water = 4.18 J/g°C  Specific heat of copper = 0.38...

Q: The position of equilibrium would not be appreciably affected by changes in the volume of the contai...

A: Le Chatelier's principle: This principle is used to predict the effect of a change in conditions on ...

Q: 70. This figure below is called adunt O myglobin O hemoglobin O globulin

A: Hemoglobin is a globular protein found in the RBCs, which are responsible for the transport of oxyge...

Q: 4. A photon with an energy of 13.323 ev hits a hydrogen atom in the ground state. What level will th...

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Q: Which of the following reactions is/are endothermic? Choose ALL that apply. a. C(s) + O2(g) → CO2(g)...

A: Identify the reaction is exothermic or endothermic ----

Q: Which of the following statements determine a reaction to be spontaneous? O The ASpxn is positive. O...

A: The relation between change in entropy, enthalpy, and Gibbs free energy can be given as: ∆G=∆H-T∆S  ...

Q: What is the correct name for 2-ethyl-3-methylpentane? Group of answer choices 3,4-dimethylhexane tha...

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Q: 20. Using the data provided, solve for the enthalpy change value of the target equation. Note: Inclu...

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Q: A sample of methane gas that has a volume of 3.8 L at 5º C is heated to 86º C at constant pressure. ...

A: Given,  Initial volume of methane gas = V1 = 3.8 L  Initial temperature = T1 = 5 ºC Final temperatur...

Q: 2. Using the structure of glycogen shown here (or any other source material), answer the following q...

A: Given Enzyme = Glycogen Phosphorylase

Q: Which of the following solutes will have the lowest vapor pressure given the same amount in moles?  ...

A: Colligative properties: The colligative properties are those properties of solutions that depend on ...

Q: Which of the following statements is correct? O A. Atomic emission detector is suitable for analyzin...

A: The correct statement would be:  

Q: Suppose an EPA chemist tests a 250. mL sample of groundwater known to be contaminated with iron(III)...

A: Answer: This question is based on stoichiometric calculation. First of all we will calculate the num...