Silica dioxide (SiO2) aerogel can be used for the capture pollutants/greenhouse gases in environmental applications (even used to capture dust particles in spacecraft) and is widely used in biomedical, construction, plumbing, automotive, aerospace and other industries. Calculate the true density of the SiO2 (in mg/cm3) if the bulk density is 0.1200 mg/L and the porosity is 0.946. What volume (mL) of voids would be present in a 150 cm3 volume of aerogel (total volume)? What volume of SiO2 (solids) would be present in the 150 cm3?

Q: Draw the major product of this reaction. Ignore inorganic byproducts. H3O+ Drawing

A: Hydration of alkene undergo via carbocation intermediate it forms more stable carbocation and…

Q: Curved arrows are used to illustrate the flow of electrons. Using the provided starting and product…

A: Dehydrohalogenation by E1 mechanism takes place in the following steps:  Step 1 : Halide ion leaves…

Q: Ethanol can be used as a fuel source in an alcohol lamp. The formula for ethanol is C2H5OH. Write…

A: Given , Ethanol is used as fuel source in alcohol lamp .

Q: Draw the major organic product of the reaction shown below. OH 4 You do not have to consider…

A: Alcohols can be oxidized to aldehydes and ketones using Na2Cr2O7 as a common oxidizing agent.…

Q: Cooks add some salt to water before boiling it. Some people say this helps the cooking process by…

A: The question is based on the concept of solutions . it involves colligative property. these are the…

Q: Draw the most stable conformation of cis-1-tert-butyl-3-ethylcyclohexane. (a) (b)…

A:

Q: A 6.00 L tank at 22.2 °C is filled with 6.86 g of dinitrogen monoxide gas and 7.15 g of boron…

A:

Q: Enter your answer in the provided box. Consider the combustion of carbon monoxide (CO) in oxygen…

A: Given: 2CO(g) + O2(g) -----> 2CO2(g)

Q: Use the reaction quotient to predict the direction of a reaction. is the ratio of products and…

A: Equilibrium constant is the ratio of the equilibrium concentration of the products and reactants…

Q: [I-] [BrO3-] [H+] Reaction Time Rate of Reaction 2.8 x 10-5/time Expt. # M M M sec. M/sec…

A:

Q: An equilibrium is established for the exothermic reaction Br₂(g) + 5 F₂(g) = 2 BrFs (g). How would…

A: Le Chatelier's Principle: According to this when a equilibrium system is subjected to stress then…

Q: When you add water to a small amount of sodium chloride (NaCl), the solid dissolved and the solution…

A: The question is based on the concept of chemical thermodynamics . we need to explain effect on…

Q: 2. a) Determine the ionic strength of the solution and the activity coefficients for each ion (Na.…

A: 2. (a) Given that, a solution containing 0.005 M of Na2SO4 and 0.001 M of CaSO4. We have to…

Q: 1. Draw out the Lewis structures for the reactants given 2. Label the electrophile (meaning a Lewis…

A: Electrophile, nucleophile classification and reaction mechanism of these reactions are given below.

Q: To prepare 50 mL of a 5.0% aqueous m/v saline solution from a 10% aqueous m/v saline stock solution,…

A: Dilution of the solution: When we dilute a concentrated solution with pure water, the amount of…

Q: -Draw the other stereoisomers of 3-bromo-2-pentanol as Fischer projections. Draw the enantiomer Draw…

A: Solution : We are given the compound 3 bromo 2- pentanol & we are asked to find the other…

Q: Question 12 of 40 > Macmillan Learning The identity of an unknown monoprotic organic acid is…

A:

Q: 6. Draw a mechanism for the following Sn2 reaction. H2O OH ye + H3O+

A:

Q: Calculate the pH after 0.23 mole of solid NaOH is added to 1.00 L of each of the following…

A: We will first convert the concentration into number of moles and will try to see the effective moles…

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

A: Given: The concentration of the X-281 solution = 0.092 M The pH of the solution = 3.00 We have to…

Q: Each step in the following process has a yield of 80.0%.80.0%.…

A:

Q: Give a description and some background information on nickel schiff base complexes.

A: Nickel Schiff base complexes are coordination compounds that consist of a nickel ion coordinated to…

Q: Suppose you can climb stairs at a rate of 101 steps/min, which typically burns calories at a rate of…

A:

Q: Consider the following equilibrium system. PbO(s) + 2 H+ (aq) Pb²+ (aq) + H₂O(l) were measured at…

A: Consider the given information as follows; PbO (s)  +  2 H+ (aq)   ⇌  Pb2+ (aq)  +  H2O (l)…

Q: a molecular-level Draw and upload here as an attachment representation of ammonium chloride (NH4Cl)…

A:

Q: First item. Just copy the entry I made below for the disposal of 250 mL of 4000 ppm palladium…

A: Solutions- Here we have to calculate the volume of solvent required and amount of palladium required…

Q: Complete the balanced dissociation equation for the compound below. If the compound does not…

A: Given AlBr3 (s) ----->  We have to write the dissociation equation

Q: Give detailed Solution with explanation needed

A: The given reactant undergoes reaction with 1.NBS ,∆  2.NaOEt  3.BH3,THF  4.H2O2,NaOH

Q: 10. The reaction of (R)-1-chloro-3-methylpentane with sodium iodide in acetone will yield…

A:

Q: 45.0 mL of a buffer solution contains 0.20 M CH3COOH and 0.25 M CH3COONa. What is the pH of the…

A: Given,    Ka = 1.8×10-5 Pka = -log Ka = -log (1.8×10-5) pKa = 4.74    Mmol of Acetic acid = M × V…

Q: An equilibrium is established for the exothermic reaction Br₂(g) + 5 F₂ (g) 2 BrFs(g). How would…

A:

Q: 3. Choose the best pair of reactants to form the following product by an S 2 reaction: (CH₂)…

A:

Q: SO₂H CH₂

A: Friedel-Crafts reactions can be used to synthesize the given compounds.

Q: 8. For the reaction the major product is formed by An S1 reaction An S2 reaction Br + CHỊCH,O Na (c)…

A:

Q: a) b) + H₂ Ni CI OH

A: When benzene reacts with Cl2 in presence of Lewis acid then it forms chloro benzene

Q: ne at 25 °C.) Before the addition of any KOH After the addition of 15.0 mL of KOH At the…

A:

Q: What is the pH of a 6.23x10-3 M aqueous solution of hydrochloric acid?

A: HCl is strong acid hence it dissociated fully in aqueous solution

Q: Considering only the compounds without hydrog bonding interactions, which compounds have…

A: Here the options are SF4 and BrF3

Q: Consider a buffer made by adding 132.8 g of NaC7H5O₂ to 300.0 mL of 1.83 M HC7H5O₂ (Ka = 6.3 x 10-5)…

A:

Q: Calculate the theoretical yield in grams All, from the complete reaction of 18.3 grams Al according…

A:

Q: I 4 II III ¹00 % IV CN V "1"a CN CN VI CN

A:

Q: A boron-siloxane cross-linked polymer was formed with a total mass of 1.80 g. How many chains are in…

A: The number of chains in a polymer cannot be determined simply from the total mass of the polymer.…

Q: Starting with the following equation, BC13(g) + LiAlH₂(s) → B₂H(g) + LiAlCl(s) calculate the moles…

A: Given, The balanced chemical equation is :  4 BCl3 + 3 LiAlH4→ 2 B2H6 + 3 LiAlCl4 To calculate the…

Q: NO Gran

A:

Q: 4. 145 J How much heat is required to raise the temperature of 8.787g of CCl4 from 37.1°C to 56.4°C?…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: The following five beakers represent solutions of 5 different acids, at the same initial…

A: The acid dissociation constant (Ka) represents the strength of the acid. The higher the Ka the…

Q: Express the following points given in Cartesian coordinates in terms of spherical coordinates. (x,…

A:

Q: 5 Consider the following chemical equation: H₂A RbOH() Rb Ag+ H₂O A0.126 mol sample of impure…

A: We know that, At equivalence point the number of moles of H+ ions is equal to the number of moles of…

Q: 1) Predict the major diastereomer(s) formed from the reduction of (+)-Benzoin with NaBH4. Explain…

A: Major product of reduction of benzoin with sodium borohydride can be  determined by Crams model.  To…

Q: When a certain freon used in refrigeration was expanded adiabatically from an initial pressure of 32…

A: The Joule-Thomson coefficient (μ) describes the change in temperature of a gas when it is expanded…

Crystal Structures

Solids are present all around us. They have different properties and applications. Diamond and graphite are two well-known solids. Diamond is the hardest material in the world and is used in making jewelry. Graphite on the other hand is soft. The lead of your pencil is graphite. Why are they so different in appearance and properties despite the fact they are chemically the same? Both are allotropes of carbon. The answer lies in the structure, the way constituent particles are arranged in the solids.