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: Compound X has a molar mass of 153.05·gmol−1 and the following composition: element…

A: We have given that Element mass % carbon 47.09% hydrogen 6.59% chlorine 46.33%…

Q: A 58.5 g sample of an unknown compound that contains only carbon, hydrogen and oxygen was analyzed…

A: mass of hydrogen present in the unknown compound is approximately 4.00 gramsExplanation:Step 1:-…

Q: Allí in a potent antibacterial compound, is formed by the enzyme allinase when garlic is chopped or…

A: Allí compounds contains four atom  carbon, Hydrogen, Oxygen, Sulfur  10 mg produced Alli  16.27 mg…

Q: Calculate the mass in grams of 1.23×10241.23×1024 molecules of methanol. The chemical formula for…

A: Given that, the molecules of methanol= 1.23 × 1024 Now, as per Avogadro’s law: 1 mol of methanol…

Q: Combustion of a hydrocarbon in a limited supply of air produces COCO in addition to CO2CO2 and…

A: You don't provide the amount of water. But based on my experience put this value. If this value is…

Q: A sample of pure alumina hydrate was obtained from a bag of flame retardant. A 5.000 g sample of the…

A: Weight of the hydrated aluminum oxide (Al2O3 . xH2O) = 5.000 g Weight of the anhydrous alumina (when…

Q: 5) 0.7971 g of molecule, X, is found to contain 3.0 x 1022 atoms. Deduce the identity of X. Given N…

A: Given: Mass of X2 = 0.7971 g Atoms of X2 = 3.0×1022 NA = 6.023×1023 mol-1

Q: What is the mass, in grams, of 9.71×1024 molecules of methanol (CH3OH)?

A: Introduction :  We need to calculate mass in grams for CH3OH . First convert molecules into moles .

Q: A crucible is placed on a balance and is found to have a mass of 26.639 grams a sample of…

A: Mass of crucible = 26.639 g Mass of crucible + mass of Na2SO4·xH2O = 27.085 g Therefore mass of…

Q: In a lab experiment, 8.21 g of phosphorus reacts with bromine to form 71.75 g of phosphorus…

A: According to the law of conservation of mass, the sum of mass of reactants and the sum of mass of…

Q: Freon-12 (CCI2 F2) is used as a refrigerant in air conditioners and as a propellant in aerosol cans.…

A:

Q: Menthol is a flavoring agent extracted from peppermint oil. It contains C, H, and O. In one…

A: no of moles=mass/molar mass General Empirical formula  Cx H 2x Oy

Q: The chemical formula for the antidepressant fluoxetine is C₁₇H₁₈F₃NO. What is the mass in grams of…

A: Given data: The molecular formula of fluoxetine is C17H18F3NO. The given moles of fluoxetine is…

Q: the mineral gibbsite has the formula al(oh)3. what mass in,in kg, of al is present in 2.9 kg of…

A: Given, mass of gibbsite,  Al(OH)3  = 2.9 kg = 2900 g Thus, moles of gibbsite can be calculated as,…

Q: How many molecules are in 4.83×1020 H2O2?   I don't quite understand how to do these calculations. I…

A: Note: Hey there! Thank you for posting the question. Since the unit is not given, we have taken…

Q: What's the percentage by mass of Cl in MgCl2 if it  is 24.6% Mg by mass?

A: Intrdouction : %age by mass of Mg = 24.6%

Q: A crucible is placed on a balance and is found to have a mass of 26.639 grams a sample of…

A: Since on heating the compound, the mass of water will be lost as it will get vaporised  Hence the…

Q: Compound X has a molar mass of 176.12·gmol−1 and the following composition: element mass % carbon…

A:

Q: Nitric acid is used in the production of fertilizer as well as nitroglycerin.  Convert 2.9 x 1021…

A: Since, we know that ; 1 mol of nitric acid contains 6.022 × 1023 molecules. So,  2.9 × 1021…

Q: Ammonium perchlorate NH4ClO4 is the solid rocket fuel that was used by the U.S. Space Shuttle and is…

A: The objective of this question is to determine the mass of water produced by the reaction of 6.89g…

Q: Ascorbic acid, or vitamin C (C6H8O6), is an essential vitamin. It cannot be stored by the body and…

A:

Q: Write the balanced equation:  White phosphorus, P4, burns in air to form a compound with a mass…

A: Given that White phosphorus, P4, burns in air to form a compound with a mass percentage composition…

Q: How

A: moles of water = ( molecules of water ) / ( Avogadro number )  Where :  Molecules of water is 2.0 •…

Q: molecules

A:

Q: A lawn fertilizer is rated as 7.55% nitrogen, meaning 7.55 g of N in 100 g of fertilizer. The…

A: Given, A lawn fertilizer is rated as 7.55% nitrogen, meaning 7.55 g of N in 100 g of fertilizer. The…

Q: A salt water mixture was prepared by dissolving 6.98 g of NaCl in 96.1 g of water. What is the…

A: The mass percentage of a component in a given solution is defined as the mass of the component per…

Q: What is the mass, in grams, of 9.43×1024 molecules of methanol (CH3OH)?

A: Calculate for number of moles of CH3OH: 1 mole of any substance contains 6.022×1023 units (namely…

Q: Copper(II) sulfate forms several hydrates with the general formula CuSO4·xH2O, where x is an…

A:

Q: c) For erythrosine, a food coloring, C20H6L4N22O5, how many hydrogen atoms would be present in the…

A: Since you have posted multiple unrelated questions, we are entitled to answer the first only.

Q: Compound X has a molar mass of 134.12·gmol−1 and the following composition: element mass % carbon…

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.