Q.4. Zinc metal can be obtained from zinc oxide, ZnO, by reaction at high temperature with carbon monoxide, CO. ZnO(s) + CO(g) → Zn(s) + CO2(g) The carbon monoxide is obtained from carbon. 2C(s) + O2(g) –→ 2C0(g) What is the maximum amount of zinc that can be obtained from 75.0 g of zinc oxide and 50.0 g of carbon? (Zn:65.4, C:12, H:1, O:16 g/mol)

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Q: Before arc welding was developed, a displacement reaction involving aluminum and iron(III) oxide was…

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Q: Ti(s)  +  2F2(g) ---> TiF4(s)       If 2.4 g Ti is reacted with 1.6 g F2 what mass of TiF4 will be…

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

A:

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Q: 1. Hydroxyapatite, Ca5(PO4)3(OH), is a naturally occurring mineral in the bone. A. Calculate the…

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

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Q: A synthesis reaction produces ammonia: 3H2 (g) + N2(g) -> 2NH3 (g). What is the maximum amount of…

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Q: PCL5(s) + H2O(l) ----> POCl3(l) + 2HCl(aq) When 79.60 g of phosphorus pentachloride reacts with…

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Q: Fe (s) + O2 (g) ➝ Fe2O3 (s). If you begin the reaction with 8.50 g Fe and 8.50 g O2, what is the…

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Q: Consider the reaction between hydrogen gas and bromine gas to form gaseous hydrogen bromide (HBr).…

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Q: Hydrogen peroxide H2O2 is commonly used to clean bacteria in scrapes and cuts. It can be used as a…

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Q: Sodium

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Q: Benzene (C6H6) is a liquid with a density of 0.874 g cm-3. It reacts with oxygen to give carbon…

A: Density of Benzene = 0.874 g cm-3 Volume of Benzene = 21.3 cm3

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Q: The solvent dichloromethane (CH 2Cl 2, molar mass 84.93 g/mol) can be prepared by reaction of…

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Q: Phosphorus can be prepared from calcium phosphate by the following reaction: 2Ca₃(PO₄)₂₍s₎ +…

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Q: 2. A sample of 1.2204 g of a compound contains only C, H, and F. When the compound is submitted to…

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Q: 1. Complete and Balance the reaction. Include all states. If there is no reaction, write NO…

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Q: 1. Consider this reaction: P4 + 6 Cl2 -→ 4 PCI3 (a) How many moles of PCI3 can be made from 16.5 mol…

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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.