A definiency in thhe vitamin nicotinamide results in the dietary deficiency disease pellagra, characterized by diarrhea, dermatitis and dementia, which was endemic in the rural Southern United States in the early twentieth century. The molecular formula for nicotinamide is C6N2H6O. What is the percent composition by mass of each element in nicotinamide?

Q: What is the source of the blue color of the solution after the reaction? You selected: the solid…

A: Copper is one of a few metallic elements with a natural color other than gray or silver. Pure copper…

Q: If you had a 0.10 M solution of each of the following organic acids: Acetic Acid Ka=1.8x10-5 Citric…

A: we have to select the acid that will produce a buffer with highest pH

Q: 5. The energy in our bodies mainly comes from carbohydrates, which are broken down into simple…

A:

Q: What is the effect of prolonged digestion in gravimetric analysis?

A: Gravimetric analysis is the process in which the amount of an analyte in a sample is determined by…

Q: 6. fluorine and 128.7g cesium? What amount of cesium fluoride in grams can be produced from a…

A: Given reaction, 2Cs (s) + F2 → 2CsF 128.7 g of Cesium reacts with 66.3 g of fluorine to give cesium…

Q: Answer with explanation The index of hydrogen deficiency of the compound C10H13N is:   Select…

A: IHD :

Q: Rank the 3 compounds from lowest to highest melting point and explain this ranking  (in 2 – 3…

A: Answer: Higher the magnitude of intermolecular attraction forces, higher will be the melting point…

Q: 1) Titrant 5 mg H2O/ mL   Resolution 2.5 µg H2O/step   Detection limit is 125 µg H2O for a 5 g…

A: To decide True or False for the given scenario.

Q: Br of DBU ?

A:

Q: Initial-rate data at a certain temperature is given in the table for the reaction SO₂Cl₂(g) → SO₂(g)…

A: We can calculate the rate constant by using rate law equation.

Q: % v/v,% w/v Questions 22. How do you prepare 250 ml of 40% v/v glycerol? 23. How do you prepare 0.3…

A: 22)  Given :-  v/v % Glycerol = 40%  Volume of 40% Glycerol = 250 mL…

Q: Baking Soda Mass (g) Recorded (no units): Number of significant figures for baking soda mass sample:

A: Introduction A chemical molecule with the formula NaHCO3 is sodium bicarbonate (IUPAC name: sodium…

Q: Which of the following is a true/correct statement?   a. Bromide ion's activity coefficient is…

A: If the ionic (I) strength of a solution increases, the activity coefficient (γ) of an ion decreases…

Q: knowing that H₂X react in the water like that H₂₂ X + H₂O H ₂ O ² + H X HX² + 1₂₂0) H₂0² + x²- Find…

A:

Q: Given a pOH of 6.90 what is the concentration of the hydronium ion (H3O*) in solution? Your Answer:…

A:

Q: Given the half-cell of the standard hydrogen electrode: Pt/H2(a=1)/H+(a=1) (Solution)…

A: The standard hydrogen electrode is represented as: Pt|H2 (a=1)|H+(a=1) and the half reaction is…

Q: e at which a certain drug is eliminated by the body follows first-order kinetics, with a half life…

A: Chemical kinetics can be defined as the branch of chemistry that deals with rates of the chemical…

Q: The compound is initially at 175°F. If the pressure is constant at P = 1 atm throughout the process,…

A:

Q: How many grams lf NH3 can be produced from 2.55 mol of N2 and excess H2?

A:

Q: 24. Which of these statements is true when comparing compounds 10 and 11? HO 10 IL A) 11 is a…

A:

Q: Comparing the two transitions (A and B) below which one would require less energy? - [Select] of…

A: Based on the transition of one shell to the other shell we can define which transition require less…

Q: Perform Dixon's Q-test for the following data points. Make a conclusion to reject or retain the…

A: Here the questionable value is the highest value, which is 1.9765 (Sample No-6) because it has the…

Q: How many grams of ice at 0.0°C must be added to 225 grams of tea at 35.0°C to cool it down to 5.0°C?…

A: Given - Temperature of ice = 0.0°C             Mass of tea = 225 g             Initial temperature…

Q: Combustion of a hydrocarbon in a limited supply of air produces CO in addition to CO₂ and H₂O. When…

A: Answer: Reaction of incomplete combustion: CxHy(g)+(a+b+y2)O2(g)→aCO(g)+bCO2(g)+y2H2O(g) Here: a+b=x

Q: The two compounds shown below are: Br Br. H and "A" A H H H Br Br diastereomers. meso forms.…

A:

Q: reacted? What is the theoretical yield of dibromostyrene if 0.50g of styrene and 1.00g of bromine…

A: Styrene reacts with bromine two to form dibromostyrene. The equation for the balanced chemical…

Q: Suppose the three waves below are electromagnetic radiation waves from the visible range, one blue…

A: A is the most intense light. A is  highest frequency light.

Q: Antifreeze is composed mainly of ethylene glycol (C2H6O2, d = 1.11 g/cm3). It is added to a car…

A: The relationship between depression in freezing point (∆Tf) and molality of solition is  ∆f = kf ×…

Q: Consider the following equilibrium process at 686°C: CO₂(g) + H₂(g) = CO(g) + H₂O(g) The equilibrium…

A:

Q: MISSED THIS? Watch KCV 14.5 WE 14.4 Read Section 14.5. You can click on the Review link to access…

A:

Q: Find the limiting reactant for each initial amount of reactants. Drag the appropriate items to their…

A:

Q: Describe the Bohr effect, with regard to the binding of O₂ to hemoglobin? O In the presence of…

A: Bohr effect : It describe the affinity of haemoglobin towards oxygen in the acidic condition. So, in…

Q: Question 3: What is the main organic product of the reaction in Figure 3? [Generate a SMILES…

A: Alkynes can be defined as organic compound that contain triple bond between carbon atoms.We have…

Q: Imagine you were working as a laboratory technician and your principal investigator asked you to…

A:

Q: What is the molar concentration of CaCl that makes an isotonic solution for RBCs?

A: The tendency of solvent molecules to pass from a higher concentrated solution to a lower…

Q: Describe the electron configuration of an atom using principal energy level, sublevels, orbitals,…

A: Here we have to discuss about electronic configuration of an atom using principal energy…

Q: a) b) C) Show the steps necessary, in order, to make each of the following compounds. Start with…

A:

Q: Assuming that the rate-determining step in the reaction of 1-hexanol with hydrogen bromide to give…

A:

Q: Which of the following are NOT examples of a pure substance? Ketchup Milk Distilled water Table…

A: We have to select the examples which are not pure substances

Q: Due to Gradescope at 5 pm on September 22, 2022 1. Draw the qualitative molecular orbital diagram…

A:

Q: Running an HPLC assay using a column heated to approximately 60 °C can have what benefits over…

A: As the temperature increases, the viscosity decreases and the column backpressure will decrease The…

Q: Which of the following molecules is most acidic? A H O O O O B E A B S H 8. E O H

A: we need to select the molecule which is most acidic

Q: Why can’t traditional ClOx catalytic chemistry explain the Antarctic ozone hole? What reaction cycle…

A: Introduction: The ozone layer is present in the stratosphere (upper air layer of the earth) and…

Q: The following equilibrium constants have been de termined for oxalic acid at 25°C: H₂C₂O4(aq) = H+…

A: In this question, we have to calculate the equilibrium constant for the given reaction.

Q: Calculate, to the correct number of significant figures, how many molecules of Sg are contained in…

A:

Q: At a certain temperature the following reactions have the constants shown: S(s) + O₂(g) = SO₂(g) Kc…

A:

Q: You have 27.96 lb of CO2 in a 43.12 ft3 fire extinguisher tank at 50degC. Assuming that the ideal…

A:

Q: 1. Give the IUPAC name of the following: a. CH3CH2 C. C H/ Cl CH3 CH3CH2CH C=C CH3 Cl H CH2CH3 b.…

A: IUPAC nomenclature: In IUPAC nomenclature  a molecule's longest chain of carbons is taken as parent…

Q: II. Give the IUPAC name given the structure of the following organic compounds.

A: IUPAC nomenclature: In IUPAC nomenclature  a molecule's longest chain of carbons is taken as parent…

Q: 6. Calculate the uncertainty in the speed of a ball of mass 500 g that is known to be within 1.0 um…

A:

Mole Concept

Mole concept is a method to determine the amount of any substance that consists of some elemental particles using a grouping unit called ‘mole’. The mole concept enables one to handle the large amount of small elementary particles. The mole concept can be used in many calculations related to mole calculation, molar amount, mole ratio, and so on, which are significant in chemistry.