A reaction generates hydrogen gas, H2, as a product. The reactants are mixed and sealed in a 250-mL vessel. After 20.0 minutes, 3.91x10-2 mol H2 have been generated.  Calculate the final concentration (in M) of H2 gas.

Q: Concentration of DDT (molar mass= 354.49 g/mol) in groundwater sample is found to be 0.030 mg/250.0…

A: We have to predict the concentration in mmol/L.

Q: Chlor-alkali plants electrolyze NaCl to produce the commodity chemicals caustic soda and chlorine…

A:

Q: The atmosphere contains 78% N2(g), 21% O2(g), and traces of other gases. These gases react at high…

A: The objective of the question is to determine the equilibrium concentration of .It is given that,The…

Q: grams of barium hydroxide

A:

Q: 1. Consider the reaction CaCO;(s) 2 CaO(s) + CO,(g). Should I perform this experiment in an open or…

A: The given reaction is,  CaCO3 (s) ←→ CaO (s)+CO2 (g)  Assume the equilibrium arrow as same as given…

Q: solution is prepared by dissolving 23.7 g of CaCl2 in 375 g of water. The density of the resulting…

A:

Q: A 9.47 g sample of an aqueous solution of hydroiodic acid contains an unknown amount of the acid. If…

A:

Q: difference in volume:

A:

Q: A chemist places 2.6428 g of NaCl in a 100 mL volumetric flask and adds water to the mark and calls…

A: The solution is given below -

Q: O Chemical Reactions Dilution 3/5 [ A chemist must prepare 125. mL of 180. mM aqueous copper(II)…

A: Step 1: Convert the molarity of the needed solution to moles/L (M).Step 2: The required volume of…

Q: An aqueous solution of potassium sulfate, K2SO4 , is made by dissolving 15.1 grams of potassium…

A: Given: Mass of K2SO4 = 15.1 g. And volume of solution filled = 250 mL = 0.250 L…

Q: Hydrogen peroxide decomposes as shown below: 2H2O2 → 2H2O + O2 (34.0 g/mol) If a 6.287 g sample of…

A: The mass of a sample of hydrogen peroxide solution is 6.287 g.The moles of oxygen gas produced is…

Q: 1. How would each of the following procedural errors affect the value obtained for the molar volume…

A: Answer: When a metal reacts with acid, it produces H2 gas and metal salts. For example: Na+HCl= Nacl…

Q: 2. Hydrochloric acid (HCI) can dissolve solid iron according to the following reaction: Fe (s) + 2…

A: According to the question, Hydrochloric acid(HCl) can dissolve in solid iron as per the following…

Q: Suppose you are performing a gas-producing reaction to experimentally determine the molar volume of…

A: Ideal gas equation:Here:

Q: Some contact lens cleaning solutions contain hydrogen peroxide (H2O2). Hydrogen peroxide decomposes…

A: Hydrogen peroxide has several uses and applications. It is used as an antimicrobial agent and an…

Q: A powder contains FeSO4·7H2O (molar mass = 278.01 g/mol) among other components. A 3.200-g sample of…

A: Answer:The question is based on the concept of gravimetric analysis and Stoichiometric Calculations.…

Q: How many moles of Mg3P2(s) can be produced from the reaction of 0.240 mol Mg(s) with 0.020 mol…

A: Limiting reagent is defined as the reagent which is completely consumed in the reaction and limits…

Q: Distilled water was added to 10.00 mL of 12.0 M HCl stock solution in a 2000. mL flask. What is the…

A: Given: Volume of HCl stock solution = 10.00 mL Molarity of HCl stock solution = 12.0 M Volume of…

Q: When 18.2 hg of water is used in a reaction, how many molecules were reacted? (Assume that the…

A: Here we have told that 18.2 hg of water is used in a reaction. Then we have to tell that how many…

Q: How many grams of anhydrous copper(II) nitrate, Cu(NO3)2, are needed to prepare 500.0 mL of a 0.0750…

A:

Q: molarity

A:

Q: Potassium cyanide is a toxic substance, and the median lethal dose depends on the mass of the person…

A: Solution :       The molarity of the solution is defined as the number of moles of solute dissolved…

Q: A chemist performs a gravimetric analysis. The chemist combines 1.00 L of 2.00 M AGNO3 (ag) with…

A: Given, AgNO3 solution Molarity of AgNO3 solution = 2.00 M = 2.00 mol/L Volume of AgNO3 solution =…

Q: What mass of KBr (in grams) should you use to make  319 mL of a 1.59 Msolution of KBr? The molar…

A:

Q: A sample of 7.44 grams of magnesium chloride is weighed out on a balanced and prepared to a volume…

A: Interpretation: A sample of 7.44 grams of magnesium chloride is weighted out on a balanced and…

Q: You dissolve 8.83 mmol of sodium bicarbonate into a total volume of 7.22 mL. What is the molarity of…

A: Molarity is no. Of moles per litre of solution.

Q: A solution of bromine in dichloromethane contains 5.0 % bromine by volume. The density of pure,…

A:

Q: following reaction is called BaCl₂ (aq) + K₂SO4 (aq) O single displacement reaction precipitation…

A: The question is based on the concept of chemical reactions.We need to identify type of reaction…

Q: What is the molar concentration of sodium chlorate in this sample?

A: Molarity is the ratio of number of moles of solute to the volume of solution (in L)

Q: You need to prepare 0.600 L of a solution of magnesium nitrate. The required molar concentration…

A: Given :  Volume of magnesium nitrate solution = 0.600 L  Concentration of magnesium nitrate = 0.156…

Q: Chlor-alkali plants electrolyze NaCl to produce the commodity chemicals caustic soda and chlorine…

A:

Q: A solution is prepared by mixing 626.0 mL of ethanol with 608.0 mL of water. The molarity of ethanol…

A: Given that the solution is made by mixing 626.0 mL of ethanol and 608.0 mL of water. Total volume of…

Q: A chemistry student must write down in her lab notebook the concentration of a solution of sodium…

A: Given: Mass of cylinder = 4.0 g.Mass of cylinder with thiosulfate = 46.56 g.And the volume of the…

Q: 2.135 g of potassium chloride in enough water to make 100.00 mL solution. Th student then pipettes…

A: Molarity = number of moles of solute / volume of solution (in L)  M1V1=M2V2 M1= initial Molar…

Q: All of the following reactions can be described as displacement reactions except 3CuCl2(aq) + 2Al(s)…

A: A displacement reaction:is the one in which a more reactive metal displaces a less reactive metal…

Q: - ] 3 Consider the reaction 1205(g) + 5 CO(g) → 5CO2(g) + 2(g) 80.0 grams of iodine pentoxide, 1205…

A: Number of moles is calculated by dividing the given mass with molecular mass. In the given question…

Q: By titration it is found that 28.7 milliliters of 0.155 M NaOH(aq) are required to neutralize 25.0…

A:

Q: A sample of MgCl,(5) is added to water and the number of chloride ions is measured to be 8 x 10.…

A: Given: Number of chloride ions = 8 × 1022 ions. And volume of solution = 5.0 L

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".