TCDD, also called dioxin (C 12H 4Cl 4O 2, molar mass 322.0 g/mol), is a potent poison. The average lethal dose in humans is estimated to be 3.0 × 10 −2 mg per kg of body weight. (a) How many grams constitute a lethal dose for a 70.-kg individual? (b) How many molecules of TCDD does this correspond to?

Q: A sample of a substance with the empirical formula XCl₂ weighs 0.5984 g. When it is dissolved in…

A: Answer:When solutions of two different substances are mixed and formation of precipitate takes place…

Q: Reaction Type:_ At completion of reactions: Grams of hydrogen peroxide Grams of water Grams of…

A: Decomposition reactions are the reactions in which chemical species breaks into simpler molecules.

Q: When you react 3.9267 grams of Na2CO3 · nH2O with excess HCl(aq), 0.6039 grams of a gas is given…

A: Here we are required to find the number of water molecule attached to Sodium carbonate

Q: (a) Calculate the molar mass of ammonium nitrate, NH4NO3. (b) What is the mass percent of nitrogen…

A: (a) Molar mass of a molecule = sum of atomic masses of all the constituent elements      Molar mass…

Q: What is the percentage of calcium carbonate present in the original mixture?

A:

Q: Suppose a piece of silver jewelry contains 7.78×1022 atomsatoms of silver (AgAg).

A:

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

A: Given: Mass of I2 produced = 93.0 g Known: Molar mass of I2 = 253.80 g/mol Molar mass of NaI =…

Q: How many moles of lithium hydroxide would be required to produce 86.5 g of Li,CO3 in the following…

A:

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: What mass of HCl in grams is neturalized by a dose of milk of magnesia containing 3.26g Mg(OH)2?

A: Given :- mass of Mg(OH)2 = 3.26 g  To calculate :- mass of HCl (in g)

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: What was the percent of potassium chlorate in the mixture

A:

Q: AlI3(s)+3K(s)->3KI(s)+Al(s) Consider the reaction of solid aluminum iodide and potassium metal to…

A: Given :-  AlI3(s)+3K(s)->3KI(s)+Al(s)  amount of Al produced = 131.75 g  To calculate :-  Amount…

Q: In a combustion reaction between 700.0 mL propane, C3H8 with oxygen gas, O2 at 25 °C, an unknown…

A: The chemical equations should be balanced in accordance with the law of conservation of mass.…

Q: 12.00 g of a potassium hydroxide, KOH solution is mixed with 40.00 g of lead (II) nitrate, Pb(NO3)2…

A:

Q: Consider the reaction: P4(s) + 6Cl₂(g) → 4PC13 (1) Given an initial mass of 15.75 g P4, an excess of…

A:

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

A:

Q: I already received help with A, B, and C but I still need the explanation and solution to subpart D.…

A: 1 mole = 6.023 * 10^23 atoms = Avogadro No

Q: The balanced equation for the reaction of aluminum metal and chlorine gas is 2AI(s) + 3Cl,(g) →…

A: The limiting reactant is the reactant which is totally consumed after the completion of the…

Q: In an experiment designed to produce calcium oxide by the chemical reaction: 2Ca + O2 → 2CaO…

A: Given reaction is,  2Ca + O2 → 2CaO Also Given is, 104.5 g of CaO was obtained out of a possible…

Q: When a sample of solid potassium chlorate is heated strongly, a decomposition reaction occurs. Solid…

A: Mole is calculated by dividing the given mass with molecular mass. When a sample of solid potassium…

Q: Balance the following chemical equation CB,H.(g) + O₂(g) - > CO₂(g) + H₂O(g)

A: Is an equation in which the number of atoms for each element in the reaction and the total charged…

Q: 2 Na(s) + Cl₂(g) Ang = gas 2 NaCl(s) mol

A: We have to calculate ∆ngas

Q: You are making double-decker sandwiches; each sandwich consists of 3 slices of bread, 2 chicken…

A:

Q: 7. Elemental phosphorus is produced by the reaction, 2 Ca3(PO4)2 + 6 SiO₂ + 10 C6 CaSiO3 + 10 CO +…

A: The given reaction is 2Ca3(PO4)2 +6SiO2 +10C→ 6 CaSiO3 +10 CO+P4 moles of Ca3(PO4)2 = 9.00 moles…

Q: Solid copper and aqueous iron(II) sulfate (FeSO4) are produced by the reaction of aqueous copper(II)…

A: A chemical equation is a short version to write a chemical reactions. It uses the symbols of…

Q: The percent composition of an unknown substance is 46.43% C, 25.77% O, 18.05% N, and 9.74% H. What…

A:

Q: Hydrogen cyanide, HCN, is prepared from ammonia, air, and natural gas ( CH4) by the following…

A: The balance chemical reaction :  2NH3(g) + 3O2(g) + 2CH4(g) ---Pt---> 2HCN(g) + 6H2O(g)  Mass of…

Q: The US Environmental Protection Agency (EPA) places limits on the quantities of toxic substances…

A: Formulae used: Molarity =Mole soluteSolution in Litre

Q: Silicon tetrachloride (SiCl4 ) can be prepared by heating Si in chlorine gas:  Si(s) + 2Cl2(g) ->…

A: Molar mass of Cl2 = 70.9 g/mol

Q: A sample of sodium carbonate, Na2CO3, weighs 40.0 g. Calculate the following quantities (a) ? mol…

A: The number of molecules or atoms present in the one mole of the substance is equal to the Avogadro…

Q: Cobalt(II) chloride forms several hydrates with the general formula CoCl2·xH2O, where x is an…

A:

Q: What is the mass (in grams) of 5.03*10^22 molecules of CO2 molecules?

A: 1 mole = 6.0226 x 1023 Molar mass of CO2 = 44.01 g/mol Given that: Number of molecules of CO2 = 5.03…

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".