Nicotinamide is an important vitamin for metabolism and is soluble in water. Deficiency of this vitamin causes a disease called pellagra. Nicotinamide contains 59.0% C, 5.0% H, 22.9% N, 13.1% O by mass. With the addition of 3.88 g nicotinamide, 30.0 mL of nitrobenzene, C6H5NO2 (d = 1.204 g / mL), the freezing point drops from 5.7 ° C to -1.4 ° C. What is the molecular weight and formula of this compound (Kd = 8.1 ° C / m for Nitrobenzene, C: 12.01 g / mol, H:

Q: The carbonate of metal M has the formula M2CO3. This metal carbonate reacts with hydrochloric acid…

A: Answer :-  a) Moles Of HCl = 6.75 ×10-3 (mol)  b) Moles Of M2CO3 = 3.38 ×10-3 (mol)  c) Molar mass…

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A: Mass of NaHCO3 = 9.2×102 mg The balanced chemical equation for the reaction of sodium bicarbonate…

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Q: References] Aspirin, CH4(0COCH3)CO,H, is produced by the reaction of salicylic acid, C,H4(OH)CO,H,…

A: The mass of salicylic acid and acetic anhydride is 100.0 g. The given chemical reaction is,…

Q: Liquid methane (CH4). and liquid oxygen (02) are used in some rocket engines. What is the mass of…

A: Given  Mass of CH4   = 500000 gram Mass of O2    = 150000 gram  Mass of CO2  = ?

Q: B) Calculate the equivalent weights of the following substances : 1) НCІ 2) H2SO, 3) Na,CO3

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Q: Aspirin can be prepared from salicylic acid (C7H6O3 ), which has a molar mass of 138.12 g/mol, and…

A:

Q: what is the mass in grams of 2.50 x 10 -3 mole of aluminum sulphate?

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: . Methyl alcohol (CH3OH) is made by reacting carbon monoxide and hydrogen in the presence of certain…

A: Given  Reaction  CO(g)  +  2H2(g)   →  CH3OH(l) Mass of CO = 40 gram  Mass of H2  = 10 gram  Mass of…

Q: Suppose 8.00g of CH4 is allowed to burn in the presence of 6.00g of oxygen. How much (in grams) CH4,…

A: The given reaction is as follows,

Q: Some brands of salami contain 0.090% sodium benzoate (NaC2H3O2) by mass as a preservative. If you…

A:

Q: Aspirin can be prepared from salicylic acid ( C7H6O3), which has a molar mass of 138.12 g/mol, and…

A:

Q: A fertilizer railroad car carrying 34,300 gallons of commercialaqueous ammonia (30% ammonia by…

A: In the process of calculating mass of citric acid, first mass of ammonia in the fertilizer needs to…

Q: Adipic acid, H2C6H8O4, used to produce nylon, is made commercially by a reaction between cyclohexane…

A: The limiting reagent in a chemical reaction is a reactant that is totally consumed when the chemical…

Q: Natural waters often contains relatively high levels of calcium ion, Ca2+, and hydrogen carbonate…

A: The balanced reaction of calcium bicarbonate to produce calcium carbonate is as follows:…

Q: Methyl salicylate (oil of wintergreen) is prepared by heating salicylic acid, C7 H6 O3, with…

A:

Q: A chemical plant uses electrical energy to decompose aqueoussolutions of NaCl to give Cl2, H2, and…

A: The given equation -  Calculate the number of moles of Cl2 - Now calculate the moles and mass for…

Q: Milk of magnesia, an over-the-counter antacid liquid, is a suspension of magnesium hydroxide in…

A: Given, Mass of Mg(OH)2 = 1.13g. Volume of HCl = 226.2mL. Molarity of HCl = 0.1746M. The moles of…

Q: CH4(g)   +    2 O2(g)  ------->   CO2(g)   +    2 H2O(g) What mass of water is produced by the…

A: 1- First determine the moles of methane :  moles of methane = ( mass / molar mass)  moles of methane…

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Q: Consider the following reaction: Al(OH)3 (s) + 3 HCl (aq) →AlCl3 (aq) + 3 H2O (l) a. What mass of…

A: First Calculate mole of Al(OH)3 by mass/molar mass  Then use mole mole relationship  1mol Al(OH)3…

Q: Methylbenzene (toluene), C6H5CH3(l), is a common paint thinner. It can be prepared from benzene,…

A: From given  Initially we are calculating theoretical yield (masa) of toluene from moles of toluene…

Q: Silver sulfadiazine burn-treating cream creates a barrier against bacterial invasion and releases…

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Q: CH3OH(l) + CO(g)                    HC2H3O2(l)      In an experiment, 15.0 g of methanol and 10.0 g…

A:

Q: TCDD, also called dioxin (C12H4Cl4O2, molar mass 322.0 g/mol), is a potent poison. The average…

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Q: Aspirin can be prepared from salicylic acid ( C7H6O3 ), which has a molar mass of 138.12 g/mol, and…

A:

Q: If a fertilizer bag indicated that it contained 35 percent K2O, a. What does the analysis look like…

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Q: Consider the reaction 3X + 2Y → 5C + 4D With excess Y, how many moles of X are needed to produce…

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Q: Aspirin can be prepared from salicylic acid (C7H6O3), which has a molar mass of 138.12 g/mol, and…

A:

Q: A supplement was tested for iron content in a laboratory. First, a random sample of 10 tablets…

A: #(a): Given the mass of the iron tablet taken to obtain Fe2O3(s) = 2.7544 g  Mass of pure and dry…

Q: To determine the amount of iron in a dietary supplement, a random sample of 15 tablets weighing a…

A: Given that  Mass of Fe2O3 = 0.355g  Molar mass of Fe2O3 = 159.69 kj/mol

Q: The following data was obtained in an experiment to determine the water content in sodium alum, [Na…

A:

Q: Aspirin can be prepared from salicylic acid (C,H,O3 ), which has a molar mass of 138.12 g/mol, and…

A: Given: Mass of salicylic acid=3.01 g Moles of salicylic acid= 3.01138.12 g/mol=0.0218 mol The…

Q: Under the right conditions, ammonia can be converted to nitric oxide, NO by the following reaction:…

A: The balanced reaction taking place is given as, Given : mass of ammonia i.e NH3 taken = 50.0 g And…

Q: a) The molecular formula of allicin, the compound responsible for the characteristic smell of…

A: The molecule is especially considered as the smallest possible unit of any particular compound which…

Q: Calcium carbide (CaC2) reacts with water to produce acetylene (C2H2): CaC2 (s) + 2 H2O (g) → Ca(OH)2…

A: CaC2s + 2H2Og → CaOH2s + C2H2gGiven mass of C2H2 = 6.5gMolar mass of C2H2 = 26.00 g/molNumber of…

Q: Propenoic acid, C3H4O2, is a reactive organic liquid thatis used in the manufacturing of plastics,…

A: The number of moles for C and H can be calculated from the gain in masses of CO2 and H2O absorbed…

Q: Aspirin can be prepared from salicylic acid (C-H,O3 ), which has a molar mass of 138.12 g/mol, and…

A:

Q: A supplement was tested for iron content in a laboratory. First, a random sample of 10 tablets…

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Q: The approximate minimum daily dietary requirement of the amino acid leucine, C6H13NO2, is 1.1 g.…

A: Molar mass of the amino acid leucine ( C6H13NO2 ) = 12 x 6 + 1 x 13 + 14 x 1 + 16 x 2 = 72 + 13 + 14…

Q: what is the percent of SiO2 in the starting mixture?

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Q: 2NH3(aq) + CO, (aq) → CH,N,O(aq) + H,O(1) In an industrial synthesis of urea, a chemist combines…

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Q: Iodine is prepared both in the laboratory and commercially by adding Cl2(g) to an aqueous solution…

A: Given, 82.1 g of iodine, I2

Q: odine is prepared both in the laboratory and commercially by adding Cl2(g)Cl2(g) to an aqueous…

A: Given, Iodine is prepared both in the laboratory and commercially by adding Cl2(g) to an aqueous…

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Q: Manufacturers of headache remedies routinely claim that their own brands are more potent pain…

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Q: 2. A 1.1324 g sample of an iron ore is dissolved in acid. The iron is oxidized to a +3 state and is…

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Q: A high-performance heater that burns propane, C3H8(g), is adjusted so that 100.0 g of O2(g) enters…

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".