a. Choose the box that represents a gaseous element.

Q: Which aqueous solution will have the lowest pH? O 0.1 M HNO₂ O 0.1 M HNO₂ and 0.1 M NaNO₂ Both of…

A: Given,The solutions:0.1 M HNO20.1 M HNO2 and 0.1 M NaNO2Ka of HNO2 = 4.5 x 10-4

Q: The label on a bottle of medicine reads "Each 5 mL teaspoonful contains glucose, 1.87 g; levulose,…

A: We have to find the amount of phosphoric acid in the recommended dosage as well as in the phosphoric…

Q: For the given molecule, highlight any nucleophilic sites in red and any electrophilic sites in blue.

A: Nucleophilic site  ---->  Electron rich siteElectrophilic site -----> Electron deficient site

Q: A titration of 79.0 mL of a tartaric acid (H2C4H4O6) solution of unknown concentration with .805 M…

A: The volume of the tartaric acid solution = 79.0 mLThe volume of the  solution = 32.0 mLThe…

Q: Certain functional groups resist metabolism reactions such as oxidation. Using the chemical…

A: The removal of hydrogen or addition of oxygen is called as oxidation. The process of chemical break…

Q: Question 15: Which would be the best choice to make a pH 3.7 buffer? Cyanic acid/sodium cyanate…

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

Q: Calculate the pH of rainwater in equilibrium with SO2 in a polluted air mass for which the sulfur…

A: Concentration of sulfur dioxide = 2.32 ppm1ppm = 10-6 atmPartial pressure of SO2 atm

Q: Provide the complete mechanism,as detailed as possible thank you

A: This reaction is the aromatic electrophilic substitution reaction of biphenyl system.As Br is ortho…

Q: Enter your answers in the provided boxes. Be sure to answer all parts. Assign formal charges to the…

A: The formal charge of an atom in a molecule or ion is the charge it would have if all bonding…

Q: How many mL of .350 M Ba(OH)2 is required to fully titrate 150.0 mL of .500 HCl?

A:

Q: 22. Which molecule listed below has a polar covalent bond? A) NaCl B) H₂O C) H2 D) all of the…

A: • Covalent bond: Bond formed by sharing of electrons between the two atoms in a molecule and bonding…

Q: What is the IUPAC name for the molecule shown? ~ 4-oxypentane O4-ethoxypropane 3-propoxyethane…

A: 1) First you need to identify the alkyl groups on both the side of the oxygen in ether.2) The alkoxy…

Q: H H H 2 Does this mechanism describe an acid/base reaction? Note for advanced students: we mean only…

A: Acid-base reaction is the one which occurs between an acid and a base.Aldehydes act as acid because…

Q: Sketch the (sp) hybridization of nitrogen. Include orbital diagram.

A: Hybridisation can be defined as the mixing of atomic orbitals having similar energy to form same…

Q: 13) How many moles of pyridine (C5H5N) are contained in 3.13 g of pyridine? A) 0.00404 C) 0.0396 B)…

A: mass of pyridine= 3.13 gmolecular mass of pyridine, C5H5N= 5 x molar mass of C + 5 x molar mass of H…

Q: 16 oz = 1lb 200lb = 1T  1oz =28g  1lb= 0.45kg. 1T= 0.9 t 280 t = ___ T using the given,…

A: Details

Q: Determine if the reaction: 2 SO₂ + 0₂ → 2 SO is spontaneous at 298.15 K if Ps02 0.56 bar, Po2 =…

A: Spontaneous reactions are those reactions whose value of Gibbs free energy change is less than zero…

Q: Consider the following reaction. Part: 0 / 2 Part 1 of 2 Cl₂ hv Draw the skeletal structure of all…

A: Alkanes can be halogenated in the presence of light or heat. The alkane does not contain any…

Q: You dilute hydrochloric acid with water in a volumetric flask. The flask gets hot, why?

A: When the water or solvent is added to concentrated chemicals in certain amount,to lower the…

Q: Which of the following represents a valid skeletal structure of pent-2-enol? Select one or more: D I…

A: It is asked to determine the correct skeletal structure of pent-2-enolTo answer the question,…

Q: Draw the Lewis structure for carbon tetrabromide, CBr. Include lone pairs. Select Draw Rings More

A: Lewis’s bonding theory is based on the octet rule. The Lewis structure is a simplified…

Q: Suppose a volatile liquid is completely vaporized into a 157 mL flask in a 99.1°C boiling water…

A: Ideal gas is also called a perfect gas. Ideal gas is a gas in which pressure P, volume V and…

Q: A solution composed of aspartic acid and sodium hydroxide would be considered a buffer? Select one:…

A: The solution that resists the change in pH is known as a buffer solution. The buffer solution is an…

Q: Rank the relative sizes of a Br, methyl, Cl, and H group. (1 is the smallest, 4 is the largest)

A: Br (Bromine)  Atomic number of Br = 35CH3 (Methyl group) In methyl group, four atoms are present.…

Q: 10. CHALLENGE. You have two distinct gaseous compounds made from element X and element Y. The mass…

A: The simplest possible formulas for reactants and products in the given chemical…

Q: Rank the following in order of increasing acidity starting with the least acidic compound as 1 and…

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

Q: Using MO theory, determine whether it would be favorable for ammonia, NH3, to react by forming a…

A: Filled orbital overlap with vacant orbital to form coordinate covalent bond that results a adduct…

Q: Which elements have only one electron shell? O carbon Ohydrogen O helium

A: The electron configurations of the given elements are:carbon: [He] 2s22p2hydrogen: 1s1helium: 1s2

Q: 3. what is the molality of Solution that contains 46 g. • CH3OH dissolve in 3449. of H₂o. Find mile…

A: The number of moles of the solute dissolved in one kilogram of the solution is known as the molality…

Q: 3. How many grams of NH CI have to be added to 500.0mL of 0.50M NH, aqueous solution in order to…

A:

Q: Click the "draw structure" button to launch the drawing utility. The structure below contains a…

A:

Q: If the pka of molecule 'A' is 2.2, then molecule 'B' will be present in the H3C A COOH neutral…

A: Answer:Presence of -I effect group in the carboxylic acid increases its acidic strength. Higher the…

Q: What is the secondary structure of DNA? a.  double helix b. random cail c. An alpha-helix d.…

A: Answer :-- The secondary structure of DNA is :- (a) double helix.Here, it is means that the DNA…

Q: Click the "draw structure" button to launch the drawing utility. Draw one of the resonance…

A: Answer:Delocalization of -electrons in a conjugated and planar system of a molecule or ion is called…

Q: (a). Calculate the internal energy of a 1.5 moles of argon gas at 298 K. Assumé ideal gas behavior.…

A: INTERNAL ENERGY:  a certain amount of energy carried by a system which varies with changing the…

Q: Draw the Lewis structure of the peptide "YQRWGLA"

A: Given Peptide: YQRWGLATo draw the Lewis structure of the peptide.

Q: 16 oz = 1lb 200lb=1T 1oz =28 g 1lb= 0.45 kg 1T=0.9t 71lb to g 71lb =___ g using the given,…

A:

Q: 1. Which of the followings will be the best candidate to make a buffer of pH = 8.50 a. HC₂H₂O₂…

A: Buffer solution are those solution which resist change in their pH. pH range of buffer tells us…

Q: define with examples . Degrees of unsaturation or Hydrogen Deficient Index HEM Spectroscopy…

A: Degree of unsaturation is used for determination of double bond or ring in a compound in…

Q: Add curved arrow notation to show how electrons will move to form a different resonance form.

A: Resonance structures are the set of Lewis structure that describe the delocalisation of electrons in…

Q: Highlight the most acidic of the H atoms shown in each molecule below. Note: if there are two or…

A:

Q: What are the nucleophile, electrophile, and leaving group in the reaction shown below? 8~-5. Br + Br…

A: This is a nucleophilic substitution reaction (SN2).

Q: Rank the highlighted bonds below in order of increasing length and in order of increasing strength.…

A:

Q: Be sure to answer all parts. Draw the products of the following acid-base reaction. CH3 2 CH3 +…

A:

Q: Describe the preparation of 2.00 L of 0.200 M glycine buffer, pH 9.1, from glycine and 1.00 M NaOH .…

A: Glycine is an amphoteric amino acid with ionizable COOH and NH2 groups.It has the structure…

Q: There are 3 steps to achieve the following transformation. Match the order of steps to the…

A: In the given reaction the alkyl bromide is converted into allylic thioether. The first step of the…

Q: WHEN WORKING WITH CHEMICALS, WHERE THERE IS A POTENTIAL FOR CHEMICAL SPLASH TO THE EYES AND FACE,…

A: When working with chemicals, it's crucial to wear appropriate personal protective equipment (PPE) to…

Q: Draw the bond-line (skeletal) structure of the condensed formula shown. Be sure to include lone…

A: Condensed structural formulaThe condensed structural formula is one of the ways to draw organic…

Q: A protocol calls for 1 liter of solution that is 1.5 % (w/v) NaCl, 5mM Tris (pH 8.0), 10% (w/v)…

A: The 1 liter of solution is to be made by using the following given reagents-1.5% (w/v) NaCl5 mM Tris…

Q: ALL CHEMICAL WASTE: A. MUST BE LABELED AS "HAZARDOUS WASTE + CHEMICAL NAME" B. IS DISPOSED OF…

A: Chemical waste is defined as the by-product or residual waste material produced during chemical…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.