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... 36 In a car engine, non-metallic element X forms a pollutant oxide Y. Further oxidation of Y to Z occurs spontaneously in the atmosphere. In this further oxidation, 1 mol of Y reacts with 0.5 mol of gaseous oxygen. Which statements about X, Y and Z are correct? ...
... 36 In a car engine, non-metallic element X forms a pollutant oxide Y. Further oxidation of Y to Z occurs spontaneously in the atmosphere. In this further oxidation, 1 mol of Y reacts with 0.5 mol of gaseous oxygen. Which statements about X, Y and Z are correct? ...
IIT-JEE - Brilliant Public School Sitamarhi
... Q.12 In a cubic crystal of CsCl (density = 3.97 gm/cm3) the eight corners are occupied by Cl– ions with Cs+ ions at the centre. Calculate the distance between the neighbouring Cs+ and Cl– ions. Q.13 KF has NaCl structure. What is the distance between K+ and F– in KF if density of KF is 2.48 gm/cm3. ...
... Q.12 In a cubic crystal of CsCl (density = 3.97 gm/cm3) the eight corners are occupied by Cl– ions with Cs+ ions at the centre. Calculate the distance between the neighbouring Cs+ and Cl– ions. Q.13 KF has NaCl structure. What is the distance between K+ and F– in KF if density of KF is 2.48 gm/cm3. ...
National German Competition and Problems of the IChO
... d) Calculate the mass concentration of calcium in mg/L! e) Which water supply station delivered the water? From hearsay Eileen knows that salty water is particularly healthy. She wants to raise the mass content of chloride in the pool water to 1%. 1 kg of pure salt costs €1.24. The pool has a base a ...
... d) Calculate the mass concentration of calcium in mg/L! e) Which water supply station delivered the water? From hearsay Eileen knows that salty water is particularly healthy. She wants to raise the mass content of chloride in the pool water to 1%. 1 kg of pure salt costs €1.24. The pool has a base a ...
Chemistry (Revised)
... FeS(s) + 2HCl(aq) → FeCl2(aq) + H2S(g) (i) Hydrogen sulfide gas is very soluble in water. Draw a diagram to show an assembled apparatus that could be used to measure the volume of H2S gas produced when a sample of ...
... FeS(s) + 2HCl(aq) → FeCl2(aq) + H2S(g) (i) Hydrogen sulfide gas is very soluble in water. Draw a diagram to show an assembled apparatus that could be used to measure the volume of H2S gas produced when a sample of ...
D--All Websites-eChemistryHelp-.mdi
... 1. The definition : Oxidation number of an element in a particular compound represents the number of electrons lost or gained by an element during its change from free state into that compound or Oxidation number of an element in a particular compound represents the extent of oxidation or reduction ...
... 1. The definition : Oxidation number of an element in a particular compound represents the number of electrons lost or gained by an element during its change from free state into that compound or Oxidation number of an element in a particular compound represents the extent of oxidation or reduction ...
enthalpy changes
... you get one carbon dioxide molecule for every carbon atom in the original and one water molecule for every two hydrogen atoms When you have done this, go back and balance the oxygen. ...
... you get one carbon dioxide molecule for every carbon atom in the original and one water molecule for every two hydrogen atoms When you have done this, go back and balance the oxygen. ...
2013 - SQA
... FeS(s) + 2HCl(aq) → FeCl2(aq) + H2S(g) (i) Hydrogen sulfide gas is very soluble in water. Draw a diagram to show an assembled apparatus that could be used to measure the volume of H2S gas produced when a sample of ...
... FeS(s) + 2HCl(aq) → FeCl2(aq) + H2S(g) (i) Hydrogen sulfide gas is very soluble in water. Draw a diagram to show an assembled apparatus that could be used to measure the volume of H2S gas produced when a sample of ...
Name:
... 1. Make a summary table of organic functional groups using the heading: Name, Functional Group, IUPAC Suffix. 2. Name the following: ...
... 1. Make a summary table of organic functional groups using the heading: Name, Functional Group, IUPAC Suffix. 2. Name the following: ...
Synthetic Polymers
... monomers. For a hydrocarbon polymer such as polyethylene, useful mechanical properties are not present until the polymer contains more than approximately 100 monomer units. Another polymer that can be produced by radical chain polymerization is polystyrene: ...
... monomers. For a hydrocarbon polymer such as polyethylene, useful mechanical properties are not present until the polymer contains more than approximately 100 monomer units. Another polymer that can be produced by radical chain polymerization is polystyrene: ...
Chapter 4 "Reactions in Aqueous Solution"
... solutes2, are dispersed uniformly throughout the substance in the greater amount, the solvent3. An aqueous solution4 is a solution in which the solvent is water, whereas in a nonaqueous solution, the solvent is a substance other than water. Familiar examples of nonaqueous solvents are ethyl acetate, ...
... solutes2, are dispersed uniformly throughout the substance in the greater amount, the solvent3. An aqueous solution4 is a solution in which the solvent is water, whereas in a nonaqueous solution, the solvent is a substance other than water. Familiar examples of nonaqueous solvents are ethyl acetate, ...
Reactions in Aqueous Solution
... solutes2, are dispersed uniformly throughout the substance in the greater amount, the solvent3. An aqueous solution4 is a solution in which the solvent is water, whereas in a nonaqueous solution, the solvent is a substance other than water. Familiar examples of nonaqueous solvents are ethyl acetate, ...
... solutes2, are dispersed uniformly throughout the substance in the greater amount, the solvent3. An aqueous solution4 is a solution in which the solvent is water, whereas in a nonaqueous solution, the solvent is a substance other than water. Familiar examples of nonaqueous solvents are ethyl acetate, ...
containing complexes of aromatic amino acids
... are attributable to the dissociation of [Phe+H]+;24 the former has been assigned as the a1 or iminium ion, H2N+QCHCH2C6H5, the latter the benzyl cation, C6H5CH2+. However, dissociation of [Phe+H]+ is also expected to give a prominent product ion at m/z 103, which is absent; in addition, the abundant ...
... are attributable to the dissociation of [Phe+H]+;24 the former has been assigned as the a1 or iminium ion, H2N+QCHCH2C6H5, the latter the benzyl cation, C6H5CH2+. However, dissociation of [Phe+H]+ is also expected to give a prominent product ion at m/z 103, which is absent; in addition, the abundant ...
Polyhedral Oligomeric Silsesquioxane
... layer-by-layer assembly onto an organic solid support.23 However, being a soft material, the ligand/polymer may not provide enough robustness against metal leaching or for recyclability.24 In recent years, the ionic liquids and the related solid ionic liquid phase catalysis have been successfully us ...
... layer-by-layer assembly onto an organic solid support.23 However, being a soft material, the ligand/polymer may not provide enough robustness against metal leaching or for recyclability.24 In recent years, the ionic liquids and the related solid ionic liquid phase catalysis have been successfully us ...
Application of Novel Phosphine Ligands in Palladium
... catalysts have advantages compared to their homogeneous counterparts. However, being less selective, for many applications they are not suitable. The construction of complex molecules possessing various functional groups, for instance, requires mild reaction conditions, selective reagents and theref ...
... catalysts have advantages compared to their homogeneous counterparts. However, being less selective, for many applications they are not suitable. The construction of complex molecules possessing various functional groups, for instance, requires mild reaction conditions, selective reagents and theref ...
AP Chem unit 13 presentation
... It is important to realize that although changes to the reaction may alter the equilibrium positions, they do not alter the equilibrium constant. ...
... It is important to realize that although changes to the reaction may alter the equilibrium positions, they do not alter the equilibrium constant. ...
Chapter 12
... to determine. The given substance is 0.0400 mole of potassium. The unknown is the number of moles of hydrogen. Because the quantity of the given substance is in moles and the unknown substance is to be determined in moles, this problem is a mole-to-mole conversion. To solve the problem, you need to ...
... to determine. The given substance is 0.0400 mole of potassium. The unknown is the number of moles of hydrogen. Because the quantity of the given substance is in moles and the unknown substance is to be determined in moles, this problem is a mole-to-mole conversion. To solve the problem, you need to ...
Document
... The value of Kc for the reaction is 1.2 . The reaction is started with [H2 ]0 = 0.76 M, [N2]0 = 0.60 M and [NH3]0= 0.48 M. Which of the following is correct as the reaction comes to equilibrium? A) The concentration of N2will increase B) The concentration of H2will decrease C) The concentration of N ...
... The value of Kc for the reaction is 1.2 . The reaction is started with [H2 ]0 = 0.76 M, [N2]0 = 0.60 M and [NH3]0= 0.48 M. Which of the following is correct as the reaction comes to equilibrium? A) The concentration of N2will increase B) The concentration of H2will decrease C) The concentration of N ...
Physical Sciences Grade 12 Term 2
... 1.3 The police car moves away from the man at constant velocity, then slows down and finally comes to rest. ...
... 1.3 The police car moves away from the man at constant velocity, then slows down and finally comes to rest. ...
Specification and sample assessment material - Edexcel
... understand that the noble gases (Group 0) are a family of inert gases and explain their lack of reactivity in terms of their electronic configurations. ...
... understand that the noble gases (Group 0) are a family of inert gases and explain their lack of reactivity in terms of their electronic configurations. ...
Ch16 - WordPress.com
... An equilibrium mixture consists of the gases N2O4 and NO2: N2O4(g) 2NO2(g) The volume of the container was increased at constant temperature and a new equilbrium was established. Predict how each of the following quantities would change at the new equilibrium compared with the initial equilibrium: ...
... An equilibrium mixture consists of the gases N2O4 and NO2: N2O4(g) 2NO2(g) The volume of the container was increased at constant temperature and a new equilbrium was established. Predict how each of the following quantities would change at the new equilibrium compared with the initial equilibrium: ...
Chapter 19: Acids and Bases
... You now know that HCl and HF are acids because they can donate a hydrogen ion in an acid-base reaction. From their chemical formulas, you can see that each acid can donate only one hydrogen ion per molecule. An acid that can donate only one hydrogen ion is called a monoprotic acid. Other monoprotic ...
... You now know that HCl and HF are acids because they can donate a hydrogen ion in an acid-base reaction. From their chemical formulas, you can see that each acid can donate only one hydrogen ion per molecule. An acid that can donate only one hydrogen ion is called a monoprotic acid. Other monoprotic ...
Ch16
... An equilibrium mixture consists of the gases N2O4 and NO2: N2O4(g) 2NO2(g) The volume of the container was increased at constant temperature and a new equilbrium was established. Predict how each of the following quantities would change at the new equilibrium compared with the initial equilibrium: ...
... An equilibrium mixture consists of the gases N2O4 and NO2: N2O4(g) 2NO2(g) The volume of the container was increased at constant temperature and a new equilbrium was established. Predict how each of the following quantities would change at the new equilibrium compared with the initial equilibrium: ...
14.1 Dynamic Equilibrium, Keq , and the Mass Action Expression
... When making assumptions, if a reaction has a relatively small keq and a relatively large initial reactant concentration, then the concentration change (x) can often be neglected without introducing significant error. This does not mean x = 0, because then this would mean there is no reaction. It mea ...
... When making assumptions, if a reaction has a relatively small keq and a relatively large initial reactant concentration, then the concentration change (x) can often be neglected without introducing significant error. This does not mean x = 0, because then this would mean there is no reaction. It mea ...
Chapter 6
... Understanding this, Berthollet was surprised to find solid Na2CO3 forming on the edges of the lake, particularly since the deposits formed only when the lake’s salt water was in contact with limestone, CaCO3. Where the lake was in contact with clay soils, there was little or no Na2CO3. Berthollet’s ...
... Understanding this, Berthollet was surprised to find solid Na2CO3 forming on the edges of the lake, particularly since the deposits formed only when the lake’s salt water was in contact with limestone, CaCO3. Where the lake was in contact with clay soils, there was little or no Na2CO3. Berthollet’s ...