How many moles of Kr are there in 39.3 grams of Kr?

Q: Discuss how an electrochemical cell is constructed and show a diagram indicating all its components.

A: •ELECTROCHEMICAL CELL=> A cell which can produce electric current by chemical reaction.…

Q: From the given situations, explain whether its solution requires a qualitative analysis,…

A: To determine whether the given solutions require a qualitative analysis, quantitative analysis,…

Q: Given the following equilibria, al zing species in a solution satu

A: Given: [OH-]= 3.2 x 10-7  To determine: Concentration of each zinc species

Q: 6. How many moles of particles are present upon dissolving one mole of each of the compounds below?…

A: upon disolving ionic compounds dissociates into its ionic form where as non ionic do not diisociate…

Q: 1. Discuss two factors that affect the solubility of a substance in water, and give one example for…

A:

Q: The ionization of acetic acid may be written as: HC,H,O, (aq) − H*(aq) + C,H,O, (aq). Examine the…

A: The ionization of acetic acid: HC2H3O2aq→H+aq+C2H3O2-aq The net ionic reactions and their heat of…

Q: Fractions are typically collected every 1.5-2 minutes. What effect would taking more fractions every…

A: Given:  Fractions are typically collected every 1.5-2 minutes To determine: The effect would taking…

Q: D Determine the [H], pH, and pOH of a solution with an [H+] = pH = pOH = n [OH-] of 4.7 x 10-12 M at…

A:

Q: A water-soluble salt formed by Hg2+ and acetate 47.863 g was dissolved in a solution containing…

A:

Q: CH3 CH₂CI NaOH SN2

A: Organic reactions are those in which organic reactant react from organic product. SN2 reaction is…

Q: Which pKa value best represents the indicated hydrogen? time H 20 15 none of these 25 30

A:

Q: Which pką value best represents this molecule? NaCl 30 10 40 none of these

A:

Q: 23) How many grams of sodium chloride are there in 55.0 mL of a 1.90 M aqueous solution of sodium…

A: Please note- As per our company guidelines we are supposed to answer only one question. Kindly…

Q: Fill compare a few different developing solvents and examine the effect of the polarity of the…

A: #Q.7: Since hexane is a symmetric hydrocarbon, it is nonpolar.  Ethylacetate is polar due to the…

Q: Once the reaction has reached completion, what amount (in moles) of the excess reactant is left?…

A:

Q: 16. At higher temperatures, the same reaction: 2 NO2(g) 2 NO(g) + O₂(g) follows second order…

A: #16: Arrhenius equation in logarithmic forms is: ln(k) = -EaR*1T + ln(A) If we compare the above…

Q: hat is the density of CO2 at 118.1 degF and 523.1 mmHg in grams per liter?

A: Density of a substance is calculated by dividing the given mass with volume Given temperature (T)…

Q: A common technique for forming metal electrodes on electronic devices is evaporation in a vacuum. In…

A: Given: The enthalpy of vaporization (ΔHvap) for gold = 310.9 kJ/mol We have to calculate the amount…

Q: Calculate and for the particle in a 1-D box of length L described by: (x)=√(7) sin()

A:

Q: for the reaction x+y+z --> products, the following data were obtained. Reaction times are inversely…

A: X+Y+Z→Products   Rate law: The expression in which reaction rate is given in terms of molar…

Q: Assume a length of axon membrane of about 0.10 m is excited by an action potential (length excited…

A:

Q: hydrogen sulfide H2S is a foul smelling gas. it burns to form sulfur dioxide 2H2S(g) + 302(g) -›…

A:

Q: Name the following ions: 2- CrO4²- is the CIO4 is the MnO4 is the OH is the ion ion ion ion

A: In this question chemical formulas of some ions are given  We need to write the names of the given…

Q: 11 Co

A: Coordination chemistry is a branch of chemistry in which we deal with co-ordination compounds. In…

Q: B. A 1.0-mol sample of an ideal gas is kept at 0 °C during an expansion from 0.003 m³ to 0.01 m³.…

A:

Q: Put these elements in order from the smallest atomic radius to the largest atomic radius: hiumlium…

A:

Q: How many moles of NaOH would you need to add to 0.1 moles histidine to achieve a pH of 9.17?

A: Given 0.1 mol histidine pH = 9.17

Q: 1) Write a short essay on the classification of nanomaterials based on structure, size and phase

A:

Q: III. 3. Balance the following equations: a. Acidic media (also identify the reducing agent and the…

A: #3:(a): The unbalanced equation is: P4(s) + NO3-(aq)  → H2PO4-(aq) + NO(g)  In acidic media, we use…

Q: A piece of ice (O0C) sitting on a hot sidewalk on a hot summer day will eventually melt and then…

A: In vaporization of ice, there would be three processes :  1.) First process will be melting of ice…

Q: knowing that H₂X react in the water like that. H₂ X + H₂O H₂O + H X HX + H₂0 -> H₂0² + x²- Find the…

A: Given: [H2X] = 16 M pKa1 = 3.2 pKa1 = 5.4 We know, pKa = -log Ka So, pKa1 = -log Ka1  3.2 = -log Ka1…

Q: Determine the [H], [OH-], and pH of a solution with a pOH of 10.76 at 25 °C. [H+] = [OH-] = pH = M M

A: given, pOH = 10.76

Q: HO IZ

A: Loan pair :-  The extra pair of electrons around the atom in the valence shell. which are not used…

Q: This question has multiple parts. Work all the parts to get the most points. a Complete the…

A: This is an example of N-acylation reaction.

Q: Determine the kinds of intermolecular forces present in each element or compound. N2 CO CCl4 NCl3…

A:

Q: Compare the solubility of ethanol and ethylene glycol in hexane. compare the structures of molecules…

A: Comparing  the solubility of ethanol and ethylene glycol in hexane .

Q: Flourinated hydrocarbons such as CHF2-CHF2 are used in refrigerants (A) Draw in a NEWMAN projection…

A: Conformational isomers are those isomers which are easily convertable without breaking sigma bond or…

Q: A 604.7 ng sample of an unknown radioactive substance was placed in storage and its mass measured…

A:

Q: H3C H3C O CH3

A: Introduction The degree of unsaturation (DoU) can be calculated by the formulae,…

Q: Write a balanced molecular equation for the reaction between citric acid (lemon juice) and sodium…

A: Recall the given reaction between citric acid lemon juice and sodium bicarbonate baking sode -…

Q: Give the organic reaction product(s) for the following reactions: CH3CH₂ C CH Br₂(xs)

A:

Q: How many single carbon-carbon bonds are in this molecule?

A: We know that, Valency of carbon is 4 because it contain 4 electron in its valence shell. Thus,…

Q: o what volume should you dilute 125 mL of an 8.00 M CuCl2 solution so that 50.0 mL of the diluted…

A:

Q: The pKa values for some indicators are given below. Which of the indicators listed would be suitable…

A:

Q: 6. fluorine and 128.7g cesium? What amount of cesium fluoride in grams can be produced from a…

A: Given reaction, 2Cs (s) + F2 → 2CsF 128.7 g of Cesium reacts with 66.3 g of fluorine to give cesium…

Q: Which compound does NOT possess a plane of symmetry? CH3 H H Br Br A X X X S "Br H CH3 Br H H3C I V…

A:

Q: Carbon and oxygen combine to form carbon dioxide. A chemical equation you might write for this…

A: Substance that are present to the left of the arrow in a chemical equation are reactants and…

Q: Q9. Draw the curve arrow mechanism and predict the structure of intermediates A/B and final product…

A:

Q: Give the name, atomic symbol, and group number of the element with Z = 31. Then classify it as a…

A:

Q: 2-25. The compound is initially at 40°F. If the pressure is constant at P = 1 atm throughout the…

A: We may proceed via these way,

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.