In the following reaction, which species is oxidized? Cu(s) + FeSO_4(aq) rightar

Question

In the following reaction, which species is oxidized? Cu(s) + FeSO_4(aq) rightarrow Fe(s) + CuSO_4(aq) Cy O Fe None, this is not a redox reaction S In which of the following diagram are the cohesive interaction between molecules in the liquid greater than the adhesive forces between the liquid and the walls of the tube? a d b none of these c Quicklime, CaO, can be produced by heating calcium hydroxide, Ca(OH)_2, What is the percent yield if 45 grams of quicklime are obtained from 1 mole of calcium hydroxide? 61% 100% 80% 90% 45% What is the satiric number of the central sulfur atom in SO_3? 2 5 3 6 4 How many grams of solid sodium carbonate (Na_2CO_3, 106 g/mol) would be required to neutralize 1.0 L of 1.0 M HCl? 53 g 530 g 110g 210 g 1100g Indicate which of the following compounds will have the lowest boiling point. CCl_4 CH_4 Cl_4 CBr_4 CF_4 What is the steric number of the central nitrogen atom in NF_3? 2 5 3 6 4

Explanation / Answer

1) Cu + FeSO4 -----> CuSO4 + Fe
Cu -----> Cu+2 (oxidation)
Ans : Cu
2) d
3) Ca(OH)2 -----> CaO + H2O
1mole of Ca(OH)2 produces 1 mole of CaO
74 g of Ca(OH)2 produces 56 g of CaO
percent yield = 45/56 * 100 = 80.36%
Ans : b
5) 2 HCl + Na2CO3 ----> 2 NaCl + H2O + CO2
number of moles of HCl = 1 * 1 = 1 mol
1 mole of HCl require 1/2 mole of Na2CO3
mass of Na2CO3 = 106/2 = 53 g
Ans : a
6) CH4 has lowest boiling point since it has less molecular mass compare to others.
Ans : d

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