In order to determine the formula of CoCl.xH;O, a student heated 0.476 g of hydrate. The mass of residue was 0.26 g. What is the approximate value of (x)? (F.Wt. of CoCl; = 129.93 g/mol , F.Wt. of H;0 = 18 g/mol). L 6 II. 5 III 3 IV 2

Q: The net ionic equation for formation of an aqueous solution of Al(NO3)3 via mixing solid Al(OH)3 and…

A: When only the major participating species of a chemical reaction are written separately in an ionic…

Q: Consider the reaction K2S(aq) + Co(NO3)2(aq) --> 2KNO3(aq) + CoS(s) What mass of CoS is produced…

A: Molarity of a solution is equal to the number of moles of solute present in one litre of a solution.

Q: 3. In a blast furnace, iron (III) oxide reacts with coke (carbon) to produce molten iron and carbon…

A: The given reaction is, Fe2O3+3 C → 2 Fe + 3 CO The reaction is already balanced since all elements…

Q: Balance the following equations 1. Fe H,S0, Fe2(SO.)3 H2 - - 2. КОН H3PO. -> KPO. H20 -- - 3. KNO3…

A: Balanced Chemical equations are those equations in which both Reactant side and Product side, number…

Q: 2) B,Brg +_HNO; >_B(NO3)3 + _HNO3 >_B(N03}3 +, HBr How many grams of HNO3 are needed to react with…

A: A balanced chemical reaction is used to determine how many moles of reactants reacted to form a…

Q: Determine the concentration of NO3− in each aqueous solution. (Assume complete dissociation of each…

A: The complete dissociation reaction of KNO3 is

Q: When 4.353 grams of a hydrocarbon, C, Hy, were burned in a combustion analysis apparatus, 12.74…

A: Mass of CO2 = 12.74 g Mass of H2O = 7.825 g Molar mass of Compound = 30.07 g/mol By the dimensional…

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.