un o 8u described in this laboratory. After heating, the sample is found to weigh 2.245 grams. How moles of H20 were present in the sample? How many moles of Fe(NO3)3 were present?

Q: How many electrons must be removed from elemental hydrogen (H2) to produce two moles of hydrogen…

A: In this question, we will determined the number of electrons which is removed from H2 gas.  You can…

Q: Mg(s) + 2 HCl(aq) −−−→ MgCl2aq) + H2(g)   given that the mass of magnesium is 0.030 g, find the…

A:

Q: 1.00 mol/L of NaX (aq) contains 4.2% solute by mass, what is the atomic mass of X? What anion could…

A: Molarity = moles of solute/Volume of solution (L)Moles of solute = mass of Solute/molar mass of…

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: 4. A sample containing 58.51 g manganese (Mn) is treated with an excess of sulfuric acid (H2SO4)…

A:

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: Balance the following chemical equation. 1. Al2(SO4)3 + Ca(OH)2 – Al(OH)3 + CaSO4haheTni neeerg…

A: We need to balance the given equations.

Q: Fe,03 + HCI → FeCl, + H2O 5 g 5 g ?g 5. How many grams of the product is produced?

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: 5.000 gram sample of hydrated beryllium carbonate, BeCO3·xH2O is heated according to the procedure…

A: To calculate the number of moles of H2O and BeCO3.

Q: An organic compound consists of carbon, hydrogen and nitrogen only. Complete combustion of a 150. mg…

A:

Q: A chemist weighs 50.0 grams of solid Mg(OH)2. How many moles of Mg(OH)2 are in the sample? How…

A: Given :-  Amount of Mg(OH)2 = 50.0 g  To Calculate :-  No.of moles of Mg(OH)2  No.of formula units…

Q: 2. How many grams of oxygen gas must be reacted with excess sulfur dioxide to produce 87.1 g of SO;?…

A:

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

A:

Q: rock is to precipitate the phosphorus as MgNH4PO4, which is then heated to tum it into Mg2P2O7. What…

A:

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: Barium oxalate is used as a colorant to produce the green color in fireworks.  Imagine that you have…

A: Given,when barium hydroxide octahydrate ( Ba(OH)2·8H2O) reacts with oxalic acid…

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: An alloy is found to be 41.8% Zn and the rest is Cu. If 15.0 g of Cu is added to 45.0 g of This…

A: Mass of the alloy = 45g% of copper in the alloy = (100-41.8) = 58.2%% of zinc in the alloy =…

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: 3) Consider the balanced equation: 2Al + Fe;N2 2AIN +3Fe. If 5.23 g AIN were produced in this…

A:

Q: [References] A sample of calcium metal with a mass of 2.06 g was reacted with excess oxygen. The…

A:

Q: You have 235.5 g of Ba(OH)2   How many moles of barium hydroxide, Ba(OH)2, are present in 235.5…

A:

Q: The density of carbon tetrachloride is 1.59 g/mL. How many moles are present in 50.0 mL of carbon…

A:

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: The amount of calcium in a 15.0-g sample was determined by converting the calcium to calcium…

A: From given, weight of sample we are calculating number of moles of CaC2O4 and from that mass of…

Q: A chemist reacted 17.25 grams of sodium metal with an excess amount of chlorine gas. The chemical…

A: Sodium reacts with chlorine to form sodium chloride. The equation for the balanced chemical reaction…

Q: A person drinks 1.50 × 103 g of water, H2O, per day. How many moles is this?

A: Given,Mass of water = 1.50×103 gMolar mass of water is 18.015 g/mol

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

A:

Q: What is the mass in grams of each quantity of lactic acid (C 3H 6O 3, molar mass 90.08 g/mol), the…

A: Given, Molar mass = 90.08 g/mol Formula Used, moles (n)=Mass requiredMolar Mass 1 mole = 6.023 x…

Q: 2. Consider the following reaction: 3Si 2N SiN a. When 21.44 moles of Si react with 17.62 moles of…

A: The given data: The number of moles of Si = 21.44 moles The number of moles of N2 = 17.62 moles.  To…

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.