A hydrated sample of sodium hydrogen phosphate (Na2HPO4) was found to contain 47.05% water by mass. Determine the formula of the hydrate. Molar mass of anhydrous sodium hydrogen phosphate (Na2HPO4) = 141.96 g/mol Molar mass of water H2O = 18.015g/mol

Q: Consider the equation:  2 Na + 2 H2O → 2 NaOH + H2.  If 92.0 g of sodium is reacted with 76.0 g of…

A: Two mole of sodium react with two mole of water and produced two mole sodium hydroxide and one mole…

Q: 4. Calculate the number of moles of CuSO4•5H2O in 100 g of the solid.

A: Given details, Mass (m) = 100g Atomic mass of CuSO4.5H2O = 249.68 g/mol To calculate the number of…

Q: What is the molarity of a barium chloride solution prepared by dissolving 9.9 grams of BaCl2•2(H2O)…

A: Molarity = (Mass/molar mass)(1000/V(ml)).Mass = 9.9g.Molar mass = 244.26g/mol.Volume = 151.0ml.

Q: A student heated the 3.572 g sample of chromium (III) chloride on a hot plate until no more water…

A: Given that, Mass of hydrated chromium (III) chloride (CrCl3•xH2O) = 3.572 g  [* x = number of moles…

Q: Consider the reaction of solid P4 and chlorine gas to form gaseous phosphorus trichloride. a) Write…

A:

Q: A mixture is 19.9% NaCl, 21.0% CaCl2, and 59.1% NaBr. What mass of the mixture contains 0.485 moles…

A: mass of the mixture that contains 0.485 moles of chloride ions moles of sodium ions present in 24.0…

Q: To a crucible and cover weighing 33.392 g is added a sample of a copper (II) chloride hydrate (CuCl2…

A: Given data, Mass of crucible + cover = 33.392g Mass of crucible + cover + sample = 34.405g Mass of…

Q: If 1.800 g of aluminum reacted with an excess aqueous HCl to produce 8.894 g of aluminum chloride.…

A: Answer:- firstly a balanced chemical equation is written then using the mass , mass of Al and cl is…

Q: You need to prepare 500 mL of a 0.50 M of BaCl₂ for your laboratory analysis. The available form of…

A:

Q: The density of ammonia, NH3, is 7.71 x 104 g/mL. Calculate the number of moles of ammonia in a 31.9…

A:

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

A: Given data :

Q: An unknown mass of NasPO4(s) is dissolved in water to form 50.00 mL of solution. This is Solution A.…

A: Let the mass of Na3PO4 dissolved = X gm Molar mass of Na3PO4 = 163.94 gm Number of moles of Na3PO4 =…

Q: Consider the combustion of methane.   CH4(g)+2O2(g)→CO2(g)+2H2O(g)  Suppose 2.5 mol  of methane are…

A: Given:Moles of CH4 = 2.5 mol.Moles of O2 = 3.5 mol.

Q: You are given a solid that is a mixture of Na2SO4 and K2SO4. A 0.205 gram sample of the mixture was…

A:

Q: The equation for the reaction between sodium hydrogen carbonate and sulfuric acid at room…

A:

Q: If a sample of coke is 95% carbon by mass, determine the mass of coke needed to react completely…

A:

Q: The mass of Cu(IO3)2 that can be formed from 0.6501 g of CuSO4 · 5H2O is _____ g. Molecular mass:…

A: Stoichiometry would be used to calculate mass .

Q: Suppose a student starts with 2.3865 g of a sand mixture and separates the components into 1.3012 g…

A: The objective of this question is to calculate the percentage of SiO2 in the starting mixture 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: 15 mL of Cl2O7 (density = 1.9 g/mL) reacts with 10. mL of H2O (density = 1.0 g/mL). How many…

A: we have the equation as Cl2O7 + H2O→2HClO4 We know that, Density =MassVolume Hence Mass=Density X…

Q: If you mass 0.430 g of Co(NO3)2 x 6H2O and dissolve it in water, what further information would you…

A: A. Since, moles = mass/molar mass we need molar mass of Co(NO3)2.6H2O to calculate moles.

Q: One way to analyze for the amount of phosphorus in a rock is to precipitate the phosphorus as…

A: Given the mass of the rock sample = 2.832 g Percent of Ca3(PO4)2 = 86.52% => mass of Ca3(PO4)2 in…

Q: Consider the following chemical reaction: 3Mg + B₂03 → 2B + 3 MgO. What mass in grams of magnesium…

A:

Q: What is the mass (in kg) of 6.89 × 1025 molecules of CO2? The molar mass of CO2 is 44.01 g/mol. O…

A:

Q: Use the concept of molarity to calculate the molarity of a solution prepared by dissolving 25.00 g…

A:

Q: Naphthalene, the active ingredient in one variety of mothballs, is an organic compound that contains…

A: Given, mass of naphthalene is 20.10 mg            Mass of CO2 formed =69 mg            Mass of H2O…

Q: A mixture of butene, C4H8, and butane, C4H10, is burned in air to give CO2 and water. Suppose you…

A:

Q: Consider the following chemical reaction: CaO(s) + H2O(l) ----------> Ca(OH)2 (aq) if 1.00 g…

A: Given  Mass of calcium oxide = 1.00 g  Mass of water = 2.00 g

Q: Sulfur dioxide gas (SO2) reacts with excess oxygen gas (O2) and excess liquid water (H2O) to form…

A: Given data, Mass of sulfuric acid = 250 g Volume of sulfur dioxide = 67.2 L

Q: Naphthalene, the active ingredient in one variety of mothballs, is an organic compound that contains…

A: Given, Mass of CO2 = 69.00mg Mass of H2O = 11.30mg Mass of naphthalene = 20.10mg

Q: An unknown mass of Na3PO4(s) is dissolved in water to form 50.00 mL of solution. This is Solution A.…

A:

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

A:

Q: 17. Consider the following chemical reaction: CaO(s) + H2O(1) ---------> Ca(OH)2 (aq) if 1.00 g…

A: No of moles of CaO = Mass/Molar mass = 1.00g/(56.08g/mol) =0.01783moles No of moles of H2O =…

Q: . Gypsum has the formula CaSO4?2H2O. Plaster of Paris has the chemical formula CaSO4?12 H2O. In…

A: For determining the amount of product, the mole ratio of reactants in a balanced reaction must be…

Q: what is the percentage by mass of magnesium nitrate in

A: Given : Mass of solution =20.6 g          Mass of Mg(NO3)2 = 2.91g    To calculate = % by mass of…

Q: A mixture of butene, C4H8, and butane, C4H10, is burned in air to give CO2 and water. Suppose you…

A:

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".