Describe a "mole" used in chemistry. First, define it, then give examples, then why it's so important. Feel free to elaborate with equations, etc. Describe the laboratory technique of "heating to constant mass". Why is it used? What benefits (if any) does it offer?

Q: Identify the intermolecular forces present in the following substances. 5) Phosphorus trichloride,…

A: Intermolecular forces :- The attractive forces present among molecules of a substance are called…

Q: In carboxylic acids, electrons__________ groups enhance acidity.   A. Transferring B. Donating…

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Q: For the following reaction, do the following:  1. Write the correct formulas for the products,…

A: The reactants given are FeCl3 (aq) and K2S (aq).

Q: Organometallic reagents are characterized by a.) polar bonds b.) carbon bonded to an…

A: Organometallic compounds are defined as compounds containing a covalent bond between a carbon atom…

Q: the questions that follow. A sample is done for you. the elements of a fire triangle. Answer…

A: A question based on general chemistry that is to be accomplished.

Q: Consider the 5 reactions shown below. 1. H2Og) + CH3Brg) → CH3OH(g) + HBrg) 2. 2 H2(g) + O2(g) → 2…

A: The reactions given are,

Q: QUESTION 5 Calculate the molarity of a solution made by dissolving 11.1 g CaCl2(s) in water to make…

A: Given that:  Mass of CaCl2 = 11.1g  Volume of solution = 400.ml = 400ml×1L/1000ml = 0.4L  Molar mass…

Q: 2. In an oxidation-reduction reaction, the substance reduced always a) takes on oxygen atoms. b)…

A: Choose the correct option for reduced process--

Q: Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 × 1010 years. What is the…

A:

Q: 1)Cu produces a positron. 2)°Sb produces a ß particle. 3)Fr produces an a particle. DW DO WE GET…

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Q: Which of the is the correct B external negative decay of lead- 212

A: The answer is given below

Q: Exercise 16.100 Enhanced with Feedback MISSED THIS? Watch KCV 16.9, IWE 16.14: Read Section 16.9.…

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Q: Data Table 1.513 Mass of 4-nitrobenzaldehyde Mass of p-anisidine Mass of product Melting point range…

A: A question based on concentration terms that is to be accomplished.

Q: explain why it would not be possible to determine the orders with respect to both iodide and…

A: To explain: why it would not be possible to determine the orders with respect to both iodide and…

Q: 1. Define oxidation numberm oxidation, reduction, reducing agent and oxidizing agent. 2. What is…

A: Define Oxidation number A number is to assign an element or atom in a chemical compound that…

Q: What is the pH of a 0.024 M acetic acid (Ka=1.8×10-5) solution at 25°C?

A: Given that, at 25°C, the concentration of the acetic acid solution is C = 0.024 M. The Ka of it is…

Q: Calculate AA'R and AG'R for the reaction CEH6() + 15/2 O2(g) - 6CO2(9) + 3H2O() at 298 K from the…

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Q: As a technician in a large pharmaceutical research firm, you need to produce 150. mL of a potassium…

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Q: Consider the following data for osmium: 190.23 mol atomic mass electronegativity 2.20 kJ 106.1 mol…

A: Electron affinity is the energy released when an electron is added to outermost shell of isolated…

Q: our Data Mass (g) of water (g) S4.573 S6.181 40.366 Mass (g) of metal 43.0S0 Too.1 Initial…

A: Given: specific heat of metal (Sm) of your data = 0.09796 Cal/g.oC = 0.4094 J/g.oC  specific heat of…

Q: to cysteine residues in protein active sites. What glycolytic enzyme would be affected? As a result,…

A: A)In the range of metal concentrations analysed we found that only hexokinase and…

Q: solution is made by mixing 0.250 L of 0.020 mol L-1 acetic acid and 1.10 g of potassium acetate (M =…

A: Here a solution contains 0.25 L of 0.02M acetic acid and 1.10 g of CH3COOK. Ka CH3COOH =1.8×10-5 .…

Q: Calculate the binding energy per nucleon for the Fe nucleus. (Atomic masses: iron-56 = 55.9349 amu;…

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Q: но NBS HBr ether CCI, a. b. Mg, ether SOCI, Br H,0 d.

A: ->HBr give substitution reaction through formation of carbocation. ->NBS give allylic…

Q: A piece of metal weighing 59.6 g with a specific heat of 0.59 Jg1°C- at 1197.5 °C is dunked into a…

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Q: The vinegar that you can buy at a grocery store is actually a dilute acid solution that is 5.0% w/v…

A: Given that, the vinegar that you can buy at a grocery store is actually a dilute acid solution that…

Q: Feco, is) • 2 HCE (aq) - FeCt; (aq) + H,0 () co, () 9.54 g Feco, reacts with 50.0 mL of a 2.74 M HCt…

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Q: 4. In the following reaction, what substance loses electrons? 2 Fe (aq) + Sn2 (aq) → 2 Fe2"(aq) +…

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Q: 7. The CO in a 28.9-L sample of gas was converted to CO2 by passing the sample over iodine pentoxide…

A: Answer: This question is based on the stoichiometric calculation where we have to convert the moles…

Q: How many grams of CaCl2 would you need to make 750 mL of a 2.00 mM CaCl2 solution?

A: Amount  of CaCl2  required to make 750 mL of a 2.00 mM CaCl2 solution is given below

Q: The orbital diagram and number of unpaired electrons of the ff.atoms:Cs,Ge,Sb,Ho,and Bk

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Q: A new potential heart medicine, code-named X-281, is being tested by a pharmaceutical company,…

A: Given: The acid concentration (Assuming it HA) = 0.092 M And the pH of the solution = 2.70

Q: If atoms have mostly empty space, so how does matter stay strong? please explain

A: The empty space in an atom is the space where the nucleus (proton+neutron) is absent.

Q: Predict the product a. H30* M9CI b. H30* LIAIH4

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Q: How can we prepare propiophenone if the staring material is bromobenzene, it should at least be 2…

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Q: (1) AV.dP = AS.dT dP = ニ 4C (2)

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Q: Write the full electron configuration for P. Dreedback Start by determining the electron…

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Q: How many grams of NaOH are there in 333. mL of a 0.90 M NaOH solution?

A: The molarity of any solution is defined as the ratio of no of moles of the solute to that of volume…

Q: What mass of NaOH(s) must be added to 1.0 L of 0.045 M NH3 to ensure that the percent ionization of…

A: The reaction happening is as follow:                           NH3 + H2O ----> NH4OH…

Q: Determine the pH of a 500mL aqueous solution with 0.12 mol B and 0.10 mol BH+, according to the…

A: moles of B = 0.12 moles of BH+ = 0.10 M

Q: 3. Which process is expected to involve the highest energy? Transition from n=5 to n=1 in hydrogen…

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Q: Enter electrons as e". Use smallest possible integer coefficients. If a box is not needed, leave it…

A: Standard reduction potential A solution with higher (more positive) reduction potential then the…

Q: Write the full clectron configuration for P. full electron configuration: Is2°2p°3;?3p6 What is the…

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Q: 5. Titration of the I2 produced from 0.1142 g of primary-standard KIO3 required 27.95 mL of sodium…

A: Given: Mass of KIO3 = 0.1142 g Volume of Na2S2O3 = 27.95 mL Molar mass of I2 = 254 g/mol Molar…

Q: ball & stick v + labels cis isomer trans isomer cis-trans isomerism not possible

A: The cis-tans isomerization is a type of stereoisomerism. The molecule which contains a double bond…

Q: 24. Challenge Photosynthesis reactions in green plants use carbon dioxide and water to produce…

A: Given, Photosynthesis reaction in green plants use carbon dioxide and water to produce glucose and…

Q: 5. In the Dumas method for determining the molar mass of an unknown volatile liquid, a sample of a…

A: Given that, the molar mass of an unknown liquid is determined by the Dumas method. The volume of the…

Q: NO2Cl(g) + NO(g) -----> NO2(g) + ONCl(g) A is 8.3 x 108  and Ea is 28.9 kJ/mol. The rate equation is…

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Q: A 100.0-mL sample of spring water was treated to convert any iron present to Fe. Titration with…

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Q: When an sample of impure potassium chloride (0.4500g) was dissolved in water and treated with an…

A: Given, mass of sample of impure potassium chloride = 0.4500 g Excess reactant = silver nitrate Mass…

Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".