A balloon is filled with methane of density 0.75 kg/m³. Let the density of air is 1.25 kg/m³. Find the volume of the balloon such that a man of 75 kg weight can be lifted.

Q: A 0.582-g sample of Mg reacts with excess 1.0 M HCl (60.0 mL) according to the procedure used in…

A: For a reaction- Enthalpy change = q / No of moles   Also, q = Mass * Specific heat capacity * Temp…

Q: If a gas sample is 25% oxygen and 75% carbon dioxide with a total pressure of 255 kPa, what is the…

A: Given that -  % oxygen = 25%  % Carbon dioxide = 75%  Total pressure of the mixture = 255 kPa…

Q: Draw the most stable chemical structure for the following peptide, at pH=12: Cys-Phe-Lys-Val-Tyr…

A: Before drawing the peptide structure, let's first see the structures of individual amino acids…

Q: Gravimetric analysis means, separation,: precipitation, measurement of mass (of the precipitate) .A…

A: Gravimetric analysis: A set of methods used in analytical chemistry for quantitative determination…

Q: 9. Calculate the pressure differential of water across the surface of a spherical droplet of radius…

A: Surface tension is defined as the property of the surface of a liquid that allows it to resist an…

Q: 6 between : (9) metal aind non-metal (19) teve non-metal & of equal electronegativity (Mi) twe…

A:

Q: A mixture of gas contains 15% oxygen, 23% nitrogen, 4.0% argon and the rest carbon dioxide. If the…

A: The pressure of a gas depends on the number of moles of gas and it does not depend on the nature of…

Q: Differentiate Di substituted from Poly substituted aromatic compounds. Draw 3

A: The parent aromatic compound is benzene. When substitution occurs in benzene molecule, replacing…

Q: Chemistry Which of the following complexes are chiral? Give a brief justification of your reasoning…

A: Chiral Complex :                                     In chemistry, a molecule or ion is called…

Q: Calculate the normality of a solution of 0.45 g/L H2C2O4, both as an acid and as a reducing agent…

A: NORMALITY The normality  of a solution expresses the number of equivalents of solute contained in…

Q: What is the wavelength in nm of a photon emitted from an H atom if an electron transfers from n=6 to…

A: Given RH= Rydberg constant = 1.097 x 10 -2 nm-1  nf = 3 ni = 6

Q: 4. 3 Hg2+ + 2 Fe (s) → 3 Hg2+2 Fe³+ 5.2 As (s) + 3 Cl₂ (g) → 2 AsCl3 6. NaBr + Cl₂ → NaCl + Br2

A: Reduction half-cell consists of reduction of species via gain of electrons while oxidation half-cell…

Q: A + 2B → C + 2D In another experiment at 25 °C, the rate of formation of C is 3.0 x 10-4 M/sec when…

A:

Q: Which of the following processes is exothermic?   frying chicken the formation of dew in the morning…

A: Endothermic reactions are the chemical reactions that absorbs heat energy during chemical reaction.

Q: Metallic sodium has low ionization energy and reacts rapidly with water at room temperature. On the…

A:

Q: QIF you know that a se cific solution inside acell whose width is (cm) molar absorption Coefficent…

A:

Q: What are two benefits of modeling a bond using the ball and stick model? ( In Atomic Struture)

A: A ball and stick model is used to show the structure of a chemical molecule. There are advantage of…

Q: 1 2 3 4 5 6 Cr₂O3 Base RX 1 01 KNO3 H₂SO4 4 5- Isatoic Nitroisatin anhydride O N- Alkyl isatin…

A:

Q: Which method - Grignard carboxylation or nitrile hydrolysis - would you use for each of the…

A:

Q: 10: H :O: CHO CÁC CHỊ CHO C CH3 Baeyer- Villiger reaction 0 H CH3C-0-C-CH3 CH3 8. CH₂C-0-H

A: Given reaction is :  Give the mechanism of the reaction = ?

Q: 43. What is the cell diagram? O None of the given. O Ag(s) | Ag+(aq) || Fe³+ (aq), Fe²+ (aq) | Fe(s)…

A:

Q: Which solvent below is apolar? CH3 H₂C-CN Acetonitrile Toluene 1 N.N-Dimethylformamide (DMF) III HẠC…

A: The covalent bond is formed by the sharing of electrons between the atoms.

Q: This is the chemical formula for talc (the main ingredient in talcum powder): Mg, (Si₂O), (OH)₂ An…

A: Please find your solution below : A mole is defined as the amount of substance that contains…

Q: write the balanced formula, complete ionic, and net ionic equations for each of the (Be sure to…

A: please find the below attachments.     Please rate helpful.   Thank you

Q: The chemical structure of lactic acid (C₂H₂O3) is shown below. Highlight each atom that is in a…

A: Given,

Q: Answer the following questions: In a laboratory scale, a biochemist was asked to study the structure…

A: #(a): Given the desired pH of the buffer solution = 7.45  Total concentration of the buffer, C =…

Q: Measurements show that the energy of a mixture of gaseous reactants increases by 202. kJ during a…

A:

Q: (A) (C) Br Br Br Br₂ Br Br Br (D)

A:

Q: QUESTION 22 How many grams of Sodium are in 0.250 mole of Sodium? B) 5.80 g A) 23.0 g C) 11.0 g D)…

A:

Q: Is DL-Homocysteine soluble in ether?

A: DL-Homocysteine is soluble in ether or not we have to discuss.

Q: C. Calculate the boiling point of the salt water solution.

A: (1c)    Given that -  Mass of salt NaCl = 12 g  Volume of water = 1 quart = 0.95 L = 950 mL  Density…

Q: acetic acid (HC2H3O2) is a liquid and is known as glacial acetic acid. Calculate the molarity of a…

A: Given-> Volume of glacial acetic acid = 25.00 ml Density of glacial acetic acid = 1.05 g/ml Final…

Q: Consider the voltaic cell: Mg Mg2+ (1.0 M)||H* (1.0 M)|H₂ (1 atm)|Pt(s) Which of the following…

A: Answer : increase the pressure of H2 at 2.0 atm Explanation :

Q: Can anyone solve this and show the solution?Or step by step. Please   Determine molality (m/kg) of…

A: The solution of the given question is

Q: What is the function of a chromophore and an auxochrome in the development of colour in an organic…

A: A chromophore is the part of a molecule responsible for showing its color. The color that is seen by…

Q: Draw the structure of the following compounds using either skeletal or condensed formula: 1. Ethyl…

A:

Q: A O B O O D CN NaOEt Br Ph CN CN CN HO B D Ph CN Ph CN

A: Activated methylene group: The methylene group present between two electron-withdrawing groups known…

Q: Direction: Write the oxidation half-reaction and reduction half-reaction, and shorthand…

A: Oxidation means loss of electrons and reduction means gain of electrons.

Q: Write the balanced equation for the reaction of sodium hydroxide with sulfuric acid. Calculate the…

A: Here we are required to calculate the molarity of sodium hydroxide solution

Q: 6 S Cr₂O3 Base RX 4 KNO3 H₂SO4 carbonyl punodwoo HCI/Zn 2 3

A: The main substrate we have is 1H-indole-2,3-dione, commonly known as isatin. The structure of isatin…

Q: A + 2B C + 2D →>>> In trial 1, 1.8 x 10-4 moles of C are formed per second with no change in volume…

A:

Q: Suppose a mixture of gases is composed of oxygen with a partial pressure of 124 kPa, carbon dioxide…

A:

Q: A gas mixture consists of Cl₂, SO₂, and Kr, where the mole fraction of Cl₂ is 0.55 and the mole…

A: We have to calculate the number of molecules of SO2

Q: 2. Is the following equilibrium reaction homogeneous or hetero- geneous? CaF₂ (s) — Ca²+ (aq) + 2F-…

A:

Q: Explain in detail the term 'solubility product,' Ksp. Use the calcium carbonate found in the…

A:

Q: I. Assign oxidation state to the underlined element. 1) Ch 2) SO₂ 3) K₂02 4) Cr₂07-² 5) Na₂O2 6)…

A: Given,4. Cr2O72-5. Na2O26. Na2S2O3Required,                   Oxidation state to the underlined…

Q: A particular reaction is identified as second-order in reactant A and has the concentration versus…

A: Chemical  kinetics is branch of chemistry in which we deal with speed at which rate of reaction…

Q: If You Know That a specific Solution inside acell whose width is (1 cm) and The molav absorption…

A: The concentration of a compound can be determined by the relationship between absorbance, molar…

Q: N₂ 1) Acetone H₂O C 2) CH (CO) NOCH, O A B. C. D E10₂C -CO,1 -CO,Et B) CO₂ NH COME CH coet

A: In this question, we will draw the structure of the major product which is formed from after the…

Q: 11. Outline the synthetic steps necessary to carry out the conversions below. You may use any…

A:

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.