Two types of pure substances are x Selected Answer: elements and homogeneous solutions. Answers: compounds and heterogeneous solutions. compounds and elements. W elements and heterogeneous solutions. compounds and homogeneous solutions. elements and homogeneous solutions.

Q: Complete the blanks in the table. Element 12C 13C 14C 16C 16C2-ion 180 23 Na 23 Nation Number of…

A: An atom consist of electrons, protons and neutrons.In case of neutral atoms, number of electrons =…

Q: OH Determine if this molecule is optically active. OH A) This molecule is chiral and optically…

A: Answer:Carbon at which all 4 groups or atoms attached are different is called as chiral center for…

Q: You have a 150X stock of buffer and you need 2.5 ml of a 1X solution. How do you make this?

A: The formula used is :Where -V1 = initial volume before dilutionS1 = initial concentration before…

Q: > What would be the major product of the following reaction? کو CH₂ CH3 CH3 zagle & & & 0 CH3 OH

A: The reaction involves the formation of a new C-C bond through the formation of enolate which attacks…

Q: Which compound in the following pair is the stronger acid? Select the single best answer. LL OH L OH…

A: Given compounds are: We have to find the compound which is stronger acid from this given pair

Q: BEFORE YOU TRANSPORT CHEMICALS OR BIOLOGICAL AGENTS YOU MUST: A. KNOW THE PROPERTIES AND HAZARDS OF…

A: The word "chemical agent" refers to any chemical element or compound, alone or in combination, in…

Q: A student, Ken, is given a mixture containing two carbonate compounds . The mixture includes MgCO3…

A: Given Data:% by mass of Carbonate = 64.74 %Mixture contains MgCO3 and (NH4)2CO3 To determine:Mass…

Q: Antacid is a common household example of a(n) acid O base buffer

A: Antacids are the substances which we use to treat excess acid produced in the stomach. Antacid…

Q: 3. Can a process occur if the entropy of the system decreases and the enthalpy increases?

A: For reaction to be spontaneous we need to check ∆G is negative or positive.If it comes out to be…

Q: Draw all stereoisomers and name each compound of the following chemical. Also indicate if there is a…

A:

Q: Draw a second resonance structure for the following ion. :OH H

A: Answer:When a structure fails to describe all the properties of a molecule or ion completely, other…

Q: What are the pKa values and buffering capacity of these following buffer components?…

A: To determine the pKa values and buffering capacity of these following buffer…

Q: G. Write balanced nuclear equations for the following reactions: 79197 Au 1224Mg 2963 Cu Target 1²H…

A:

Q: Calculate the heat of reaction AH for the following reaction: CC14(g) + H₂(g) →CHC1₂(g) + HCl(g) You…

A: The formula is -From the given table, we can determine the heat of reaction.

Q: A robot spacecraft returned samples from the planetesimal 98765 ALEKS, located in the outer Solar…

A: Given ,Mass spectroscopic analysis of ruthenium .Objective : Calculation of average atomic mass ,…

Q: compare the pH between two titrations: HCl 25ml 0.1M and KOH and CH3COOH 25ml 0.1M and KOH.…

A: To compare the pH between two titrations, we need to know the volume and concentration of the base…

Q: Calculate the [OH-] and the pH of a solution with an [H+] = 0.0056 M at 25 °C. [OH-] = pH =…

A: pH is defined as the negative logarithm (base 10) of activity of hydrogen ions.Similarly,pOH is…

Q: Two gases X and Y are found in the atmosphere in only trace amounts because they decompose quickly.…

A: The half-life of a reaction is the time taken for the reactant to reduce to half its initial value…

Q: 1. Consider the following reaction: HBr 0°C Br a) Which product is the more stable product, and why?…

A: For the given reaction:a) Determine the more stable product and the reason for its stabilityb) Draw…

Q: The vapor pressure curves for R-245fa and R-1336mzz-Z are presented below. AC units can operate…

A: According to THIRD LAW OF THERMODYNAMICS, ENTROPY of gas increases with increase in temperature.Also…

Q: Classify each solution as hypertonic, isotonic, or hypotonic to a red blood cell. Solution A: 3.21%…

A: Isotonic Solution: When the concentration of a solution is equal to other solution then the solution…

Q: An aqueous antifreeze solution is 37.8% ethylene glycol (C₂H60₂) by mass. The density of the…

A: Molarity = moles of solute/Volume of solution(L) Molality = moles of solute/mass of solvent(Kg)Moles…

Q: IN THE EVENT OF A FIRE, SEVERE WEATHER OR ANY OTHER EVENT REQUIRING LAB EVACUATION.... A. STABALIZE…

A: The fire alarm should be activated to start the evacuation process if laboratory staff members…

Q: Determine the molarity and mole fraction of a 1.03 m solution of acetone (CH3COCH3) dissolved in…

A: Given,the molality of the acetone solution = 1.03 mdensity of acetone = 0.788 g/cm3density of…

Q: Which of the following is the most stable alkene? Multiple Choice O 11 E 111 IV

A:

Q: An unknown compound, X, is thought to have a carboxyl group with a pKa of 2.0 and another ionizable…

A: Given ,An unknown compound X have a corboxyl group with pKa = 2.0 , and another ionisable group with…

Q: 4. How many moles of NaOH must be added to 1.0 L of 2.0 M HC₂H₂O₂ to produce a pH of 5.00 buffer…

A: Answer:Buffer solution is a type of solution that resists the change in its pH on adding small…

Q: Curved arrows are used to illustrate the flow of electrons. Follow the arrows to predict the…

A: The given reaction involves two steps.First step is deprotonation of alcohol to form oxide…

Q: Choose the correct IUPAC name for this compound:

A: For naming organic compounds, certain rules are to be followed:Select the longest continuous carbon…

Q: What is the chemical structure shown?

A: To determine the chemical formula from the structure shown in the figure.

Q: COLLIGATIVE PROPERTIES: SMART WORKSHEET PART I. DETERMINING THE FREEZING POINT OF WATER PART 1.1 The…

A: The expression of the freezing point depression of the solution is .Where, i is the Van't Hoff…

Q: Topic: Organic chemistry FIND THE REACTION MECHANISM FOR: Oxidation with potassium permanganate На с…

A:

Q: Draw the products of the two step reaction sequence shown below. Ignore inorganic byproducts. mCPBA…

A: -> mCPBA/CH2Cl2 is reagent which give epoxide when reacts with alkene.-> Epoxide ring can be…

Q: mplete the equation for the ionization of water by drawing the conjugate acid and conjugate base.…

A: According to Bronsted and Lowry concept,  an Acid is a substance that has the tendency to donate a…

Q: 2. Provide two additional important resonance forms for the molecule below. Of the three resonance…

A: Resonance is one of the parameters that explains the stability of the organic compound. Resonance is…

Q: 6. Geosmin is a volatile molecule synthesized by a soil organism. The characteristic 'after rain…

A: Geosmin is a sesquiterpenoid.A well-known compound that is responsible for the undesirable ‘earthy’…

Q: How many hydrogen bonds does this molecule have?

A: We have to find out total no. of  H-bonds that are formed by the given molecule.

Q: Magnesium Nitrate, Mg(NO3)2, is an example of an atom a molecular compound an ionic compound a…

A: Ionic compound:Ionic compound composed of cation which is positively charged (+charge) and an anion…

Q: Neutron diffraction, like X-ray diffraction, is useful in some kinds of structure determinations.…

A: According to De Broglie just as light has both wave-like and particle-like properties, electrons and…

Q: Draw an equivalent resonance structure that minimizes charge. Include all lone pairs in your…

A: The carbocation is stabilized by the resonance of adjacent double-bonded carbons.In this resonance…

Q: Which of the following statements is true?

A: Amines are basic in nature due to the lone pair present on the nitrogen atom that can be donated.

Q: Make two solutions of 100 ml each: A is 125 mM Na2HPO4, 7H2O (FW = 268) and B is 0.25 M NaH2PO4 (FW…

A: Given Data:Solution A is 125 mM Na2HPO4. 7H2O (FW = 268) Solution B is 0.25 M NaH2PO4 (FW = 120)Mix…

Q: 0 99.81 H / KS H H-C-C KO О H H Н для в Decrease Scale ChemDoodie

A: Given an acetaldehyde moleculedetermine the number of unshared electrons on atoms.

Q: 1,3-Pentadiene has how many bonding n molecular orbitals? OA.0 B. 4 O C. 1 OD. 3 OE. 2

A: The pi-bonds in the diene isomers are conjugated rather than isolated to stabilise the molecule.…

Q: these > Which amino acid would have its isoelectric point near pH 10? (NHCH₂CH₂CH₂CHCOO -CH₂-CHCOO…

A: In this question we have given some amino acids and we have to explain that which amino acid has…

Q: The following graph displays the concentration of bromine gas during the reaction H₂(g) + Br₂(g)…

A: The given reaction,from the given reaction, is a reactant. So, its concentration decreases time.

Q: Which of the following is an example of a chemical change? X Selected Answer: Answers: alcohol…

A: Physical changes: These are the changes that does not affect the chemical composition.These are…

Q: Label each picture as polar (P) or non-polar (NP) CF4 Box 6 H3CO. Box 7 OCH3 Box 8 (CH3)202 Box 9

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Q: Rank the following in order of increasing (lowest to highest) boiling point. CH3 CH CH3 CH₂ A CH3…

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Q: what is the full structure of CH3COCH2CO2OCH2CHO.    Please type answer note write by hend.

A: Given- Formula of    CH3COCH2CO2OCH2CHO.We need to write the   full structure of CH3COCH2CO2OCH2CHO.