What unknown solid sample has a melting point range of 78 degrees celcius to 81 degrees celcius? What is the percent error in its melting point?

Q: What is an azeotrope? Can azeotropes be separated using simple distillation? Why or why not?

A: Azeotrope :

Q: 19. If 500 mL of mineral oil are used to prepare a liter of mineral oil emulsion, how many grams of…

A: 19. 500 mL of mineral oil having a specific gravity of 0.87 are used to prepare a liter of mineral…

Q: Which of the following products would you expect to be a minor product in each case? Substantiate…

A:

Q: Calculations: Calculate the concentrations of dichromate and permanganate in the unknown solution?

A: Absorbance is the amount of light absorbed by a solution at a given wavelength. According to…

Q: Hydrogen peroxide, H₂O₂ (aq), decomposes to H₂0 (1) and O₂ (g) in a reaction that is first order in…

A: Given: The decomposition of H2O2 is first order in H2O2. Rate constant, k = 1.06 × 10-3 min-1 We…

Q: 3. Tris(hydroxymethyl)aminomethane [ (HOCH₂)3CNH2, commonly called "Tris" ] is a good…

A: #3: Tris buffer has "Tris-HCl" as the weak acid and "Tris" as the conjugate base. Given the pKa of…

Q: Anot O- (a) Determination of Specific Heat 150.0 g Lead -22.0 °C 50.0 g Water Insulation (b) after…

A: Specific heat of lead can be calculated based on the heat released on dissolution of lead in water.

Q: 5 A new element, element Jn, is discovered on a separate planet. The energy requires to ionize one…

A: The answer to the following question is-

Q: 5. Even with excess cyanide present, only one equivalent will react with the following…

A:

Q: Claim: Light is a wave Evidence: Enter your answer here Reasoning:

A: Light is an electromagnetic wave , it possesses dual character that is wave and particle nature.

Q: Compare the boiling points of the various isomeric hydrocarbons shown in the table below. Notice the…

A: The boiling point of an alkane depends on the surface area of the molecule. So, higher the surface…

Q: Home Use the following information tools answer the next question. Potential Energy Diagram E, (kJ)…

A: We have given a potential energy diagram. We have to identify change in enthalpy for forward and…

Q: What is the stereochemical relationship between the following structures? I Н. ZI ""H A. Identical…

A: Given structures:

Q: What is the correct name for 6-propylheptanal?

A: In IUPAC naming system, the names of all organic compounds are created by the standards determined…

Q: minum nitrate forms a white crystalline hydrate with the fa O3)3.nH₂O(s). If this hydrate is heated…

A: Number of moles is calculated by dividing the given mass of the substance with molecular mass of the…

Q: ased on the following chemical equation, how many moles of citric acid are needed completely react…

A: Mole can be defined as a standard unit for  measuring large quantities of very small entities such…

Q: the chemical formula for sodium thiosulfate pentahydrate.

A:

Q: In the following reaction, HCO3(aq) + H₂O() CO3²-(aq) + H₂O*(aq) a. H3O+ is an acid and HCO3 is its…

A:

Q: following chemical equation: eacts in basic water to form chlorite and chlorate according to the…

A:

Q: Starting from the wedge-and-dash structure below (sighting down the indicated bond). Rotate the back…

A:

Q: Provide the correct IUPAC name for the skeletal (line-bond) structure shown here. * 2,2,3,3-3,3-…

A:

Q: low much iron ore (that assays at 16.24% Fe) must be used in an analytical procedure that is known…

A:

Q: Explain how H2O dissociates into hydroxide ions (OH-) and hydrogen ions (H+), and calculate the…

A: A question based on equilibrium concept that is to be accomplished.

Q: and 12 2Fe(s) + O2(g) + 2H₂O(1) →2Fe(OH)2 (s) Express your answers in moles to three significant…

A: Given -> Mole of Fe = 1.75 mole

Q: 1. The number of valence electrons is indicated by what periodic table number? 2. Metals tend to 3.…

A: Periodic table: The arrangement of elements in charts helps in determining the chemical and physical…

Q: sample of an ideal gas at 1.00 bar and a volume of 1.37 L was placed in a weighted balloon and…

A: Given -> Initial pressure (P1) = 1.00 bar  Initial volume (V1) = 1.37 L Final pressure (P2) =…

Q: Provide the least stable (highest energy) chair conformation Relative cis/trans stereochemistry…

A: Given -> Compound-> trans-1,2-dimetylcyclohexane  -> trans (1,2) => ( a,a) , (e,e)

Q: how many grams of na2so4 are required to make 0.350l of 0.500m na2so4?

A:

Q: СН3 3 C(CH H

A: Stereochemistry is branch of chemistry in which we define the three dimensional arrangement of atoms…

Q: Arrange the following substances in order from weakest to strongest acid: HClO3, HOI, HBrO2, HClO2,…

A: The acidic strength of acids with same oxidation number depends upon the electronegativity of…

Q: c. If there are atoms at the eight corners of a simple cubic cell and each atom is shared by eight…

A: Here we have to determine the total number of atoms per SCC unit cell and co-ordination number of…

Q: 2-(carboxymethyl)- 2-hydroxybutanedi oic acid 2-carboxyethyl 2-iodobenzyl amine

A:

Q: At 1 atm, how much energy is required to heat 57.0 g of H₂O(s) at -12.0°C to H₂O(g) at 175.0°C?…

A: To calculate the total energy required to heat water from - 12.0°C to 175.0°C , there are different…

Q: 12. Consider the chemical reaction 2HCl(g) H₂(g) + Cl2(g). It contains 8.0 mol HCI, 0.20 mol H₂ and…

A: Given - Moles of HCl =8.0 mol             Moles of H2=0.20 mol             Moles of Cl2 = 0.40 mol…

Q: IR Spectrum Transmittance 70- --09 60- 50- 40- 30- 20- 10- 3500 2993 2948 3000 -2831 2500 Wavenumber…

A: Groups that are accompanied by change in dipole moment shows IR spectra at specific position…

Q: Question: The titration of a 25.0 mL sample of an aqueous solution containing HNO3 requires 18.6 mL…

A: Titration of a 25.0 mL of an aqueous solution containing HNO3 requires 18.6 mL of 0.150 M BaOH2 to…

Q: Which of the following is TRUE regarding the relative strengths of the halogens as oxidizing agents?…

A:

Q: Calculate the mass in grams of 1 glucose molecule ( C6H12O6)

A:

Q: True or False: One mole of an element has the same number of atoms as one mole of any other element.

A:

Q: Tutored Practice Problem 15.3.4 COUNTS TOWARDS GRADE Use K and initial concentrations to calculate…

A: Given :  Keq = 0.243 and 279K and equilibrium expression is also given  To find :  To find out the…

Q: Which statement is NOT true regarding orthologous genes? O They usually have the same function. O…

A: They usually have a similar three-dimensional structure.

Q: 2. What is the compound's empirical formula if a 0.234 g sample of the compound was burned in air to…

A:

Q: 1) Rank the following titrations in order of increasing pH at the halfway point to equivalence (1 =…

A: Note: As per the guidelines, solution of first question has been made. For the expert solution of…

Q: a) which type of transformation do you perform so that the transformed data resembles a straight…

A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…

Q: Vapor pressure curves for CS₂ (carbon disulfide) and CH3 NO₂ (nitromethane) are drawn below. What…

A: The given graph is plotted between temperature °C in x-axis and vapor pressure (mm Hg) in y-axis.

Q: The reaction (CH3)3CBr + OH- -> (CH3)3COH + Br- in a certain solvent is first order with respect to…

A: Recall the given reaction,                     CH33CBr  +  OH-  →  CH33COH  +  Br-The reaction is…

Q: 34.80 grams of Cr(C2H3O2)3 are dissolved in enough water to prepare 650.0 ml of solution. How many…

A: we have to calculate the volume of Cr(C2H3O2)3 solution in mL needed to produce 0.0280 mol acetate…

Q: Based on the equations for today's reaction: 2- 2- 2 S₂03² + 1₂ S406² +21- + 1₂ → S406² 2+ 2 Cu²+ +…

A: Answer: This question is based on stoichiometric calculation where we have to convert the moles of…

Q: 18. Explain your answer to question 11. Which one of the following isoelectronic species has the…

A: Isoelectronic species are atoms, ions or molecules that have the same number of valence electrons.…

Q: 3. Propose a reasonable reaction mechanism for the following transformation. OH Ho for FO H3O+ H₂O

A: This is a rearrangement reaction where acid hydrolysis is taking place and via certain steps we are…

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.