QUESTION 3 A student makes a solution by dissolving 25.4 g of NaOH into 450 g of water. What is the mass percent (m/m) concentration of this solution?

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A: In a reverse phase chromatography, the solid stationary phase is non-polar in nature and the liquid…

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A: The number of different types of carbon atoms can be determined by the 13-CNMR spectroscopy. In the…

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A: The detailed solution of your question given below-- For the understanding the elements if periodic…

Q: please answer question 17 only

A: To find: The name of the given compound

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A: Number of mol of CH4 required = Q/∆Hrxn Q =  m . Cs . (T2 - T1) Given that: m = 100.0 g Cs = 4.184…

Q: 1) State the number of degrees of freedom of a gas composed of one of the following a. Ne (neon…

A: Degrees of freedom = 3N  N = number of atoms

Q: Two hydrogen atoms interact to form a hydrogen molecule. Classify the following statements that…

A: Part A) When two hydrogen atoms approach each other to form a chemical bond, different interactions…

Q: 8. What volume of NH, gas, collected over water at 23°C and 100 kPa, will be produced by the…

A: 8.  To find the volume of NH3 collected, we need to find the moles of NH3 produced first.

Q: NOT a valid IUPAC name of an alkene? A. 3-methyl-2-nonene OB. 1-propene OC. 3-methyl-3-hexene OD.…

A: 31) The IUPAC name of the alkene which is not valid is

Q: Bond Enthalpies ΔΗΞ Σ ΔΗ(bonds broken) - ΣΔΗ(bonds formed) Draw the Lewis structures for each…

A: The bond energies:  C-H = 413 KJ/mol  C-Cl =328 KJ/mol  H-Cl =431 KJ/mol  Cl -Cl =242 KJ/mol  First…

Q: 4.00 mL of a 2.00 M Ca(NO3)2 are added to 25.0 mL of 2.00 M sodium sulfate. 0.975 g of a solid…

A:

Q: Rose gold is a mixture of gold, copper, and silver atoms. It contains 58.3% gold, 33.5% copper, anc…

A: To solve this problem first we calculate the mass of rose gold then we calculate the mass of copper…

Q: 8. In this case, the pH of the Flint River is well-characterized at 7.92. Based on your chemical…

A: Hello. There are multiple questions posted together. The first question has been solved. To receive…

Q: 10. Which of the equation below refers to the enthalpy of combustion? vos 16 29isivioE HOTlih sh A.…

A:

Q: Rank the equilibrium constants for these three reactions from largest to smallest. Rank from largest…

A: Answer: Given three reactions are: K+12Cl2→KClK+12Br2→KBrK+12I2→KI In all three reaction potassium…

Q: A virus particle has an approximate volume of 5.20 x 106 nm3 and an approximate mass of 1.00 fg.…

A:

Q: CHEMICAL FLAME COLOR OBSERVATIONS NAME & FORMULA Calcium, Ca Lithium Li Sodium, Na* Strontium, S…

A:

Q: Question 2 You heat a 54.2 g sample of hexanes using a heater using 223.3 W of power for 10.0…

A: Given that: mass of sample = 54.2 g Power = 223.3 W Time = 10.0 s Initial temperature = 21.1 oC To…

Q: The binding energy of electrons in a metal is 294 kJ/mol. If 8.92 x 1024 photons of light with a…

A: Binding energy is the amount of minimum energy required to eject electrons from the metal surface.…

Q: Morphine (molar mass = 285.37 g/mol) is a narcotic %3D painkiller. How many moles of morphine are…

A: We know that : moles = weight of substance/molecular weight of substance  Or, moles (n) = weight…

Q: Compare and contrast the expected and actual observation of the Gold Foil Experiment. For each…

A: Thomson model describes about the atom in such a way that sphere has a positively charged around…

Q: Please answer question #7

A: Answer

Q: A reaction has a constant half-life of 250 s. How long will it take for the reactant concentration…

A: Given: Reaction is having a constant half-life of 250 s. And to find the time required for the…

Q: 1. We examined how different elements combine to form compounds using two models, the Periodic Table…

A: Macromolecules are molecule with large no. of atoms and molecules combined to each other, it's…

Q: Last edit was seconds ago BIUA =明山 3 GO ... TT Lesson 11: Student Activity Sheet Please read the…

A: The discovery describe that everyone need six elements of live life i.e carbon, hydrogen, nitrogen,…

Q: 3.. What is the likely charge of each of the ions formed by the following atoms? As Rn In Br Mg. Ge…

A: we have to determine the likely charge on the ions formed by the given atoms

Q: Crude oil is sold in units of barrels, where 1 barrel = 160 liters. Assume that crude oil has a…

A: Given : Density = 823kg.m-3  Volume = 1 barrels

Q: 04 Math Short Answer 1/2 How much heat is released when a 27.7 g sample of ethylene glycol (C = 2.42…

A: 4) Given: Mass = 27.7g heat capacity of ethylene glycol = 2.42 J/ g oC Initial temperature = 42.76oC…

Q: Classify each of the following changes as physical or chemical. Drag the appropriate items to their…

A: There are mainly two type of changes , physical and chemical. In physical change only outer changes…

Q: 1. How does the organization of the periodic table help us identify possible substitutions for…

A:

Q: 4. Some contact lens solutions use boric acid buffers to resist pH change. Over what pH range does…

A: pH=pKa +log[salt]/acid pOH=pKb + log[salt]/base boric acid has formula H3BO3, it is a weak acid with…

Q: 2. If 1.0120 g of potassium iodate were used to make the 500.0 mL solution, what is the molarity of…

A: Molarity is defind asmolarity=molevolume in litre________________________________________________The…

Q: Two samples of potassium chloride are decomposed into their constituent elements. One sample…

A:

Q: 2. 340 mL of oxygen gas are collected by displacement of water at 33 °C and 742 torr, where the…

A: since you have asked for question 2 only, we are providing a solution for the second question only.

Q: Please help me answer question 4,5,and 6.

A: 4.

Q: A new isotope is discovered that has a mass of 25 amu and 15 neutrons. What is the elemental…

A: Given that, Mass = 25 amu No. of neutron=15 Element ?

Q: Due to the small and highly electronegative nature of fluorine, the oxyacids of the this element are…

A: Formal charge = [ number of valance electron ] -[non bonding electron + number of bonds ]

Q: 6. Calculate the masses of NaH2PO4 H20 and NazHPO, 7H20 needed to make 100.0 mL of a 0.100 M…

A: 6. Given that: volume of solution = 100 mL = 0.1 L molarity of solution = 0.1 M pH = 7.40  To…

Q: Stoichiometry Test Study Guide 1). Laughing gas, N20, can be turned into smog, NO2, by heating the…

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Q: The rate law for this clock reaction measured at a different temperature was found to be: rate = 7.0…

A: Given that the rate is the time it took to completely consume the third component whose…

Q: The forensic technician at a crime scene has just prepared a luminol stock solution by adding 20.0 g…

A: Molarity :-  The number of moles of solute dissolved in 1 litre of solution is defined as molarity…

Q: Draw a formula unit of calcium chloride and use that to determine the chemical formula of the 5.…

A:

Q: Which of these molecules will have both London dispersion and dipole-dipole forces? a) HCI b) CH20…

A: The attraction forces between the different molecules are known as intermolecular forces.