Realgrades

At what oxygen content would many metals become flammable even at low pressures, whereas they are non-flammable in air? a) >10% b) >25% c) 20-40% d) >40% - correct answers B 4.2.20.1 What area of a heater burning fuel oil with numerous impurities would first suffer damage from fuel ash corrosion. a) shock tubes b) radian tubes c) tube hangers and supports d) convection tubes - correct answers C 4.4.6.4 c) Hydriding of titanium is a metallurgical phenomenon in which hydro...

Alternating current field measurement (ACFM) - correct answers Electromagnetic inspection technique that can be used to detect and size surface-breaking (or in some cases near-surface) defects in both magnetic and non-magnetic materials. Actual Throat - correct answers The shortest distance between the weld root and the face of a fillet weld. Air Carbon Arc Cutting (CAC-A) - correct answers A carbon arc cutting process variation removing molten metal with a jet of air. Arc Blow - correc...

None! Number of welds to RT is established by the primary code - correct answers How many welds does 577 require to be RT'd Arc blow - correct answers Deflection of an arc from normal path because of opposing magnetic forces Arc length - correct answers Distance from the tip of the welding electrode to the adjacent surface of the weld pool Autogenous - correct answers Welds made without filler metal Backing - correct answers Material or device placed on back side of a joint, to su...

A - correct answers What does "L" mean in Austentic SS, like 304L? A) Has a low carbon content B) has a low chrome content C) has a low nickel level D) has a low toughness level E) is lousy steel A - correct answers What does "H" mean in Austenitic SS, like 316 H? A) Has a high carbon content B) has a high chrome content C) has a high nickel level D) has a high toughness level E) is horrible steel A - correct answers Which of the following is NOT a Ferritic Steel? A...

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chemical kinetics - correct answers the study of reaction rates, how reaction rates change under varying conditions and by which mechanism the reaction proceeds. Reactions can be spontaneous but - correct answers this does not mean they occur fast Kinetics - correct answers the study of reaction rates reaction rates - correct answers a measure of how quickly reactants turn into products rate laws are - correct answers how the rate depends on amounts of reactants integrated rate la...

reversible reactions - correct answers a chemical reaction in which the products can react to re-form the reactants chemical equilibrium - correct answers when the rate of the forward reaction equals the rate of the reverse reaction + the concentration of the products + reactants remain unchanged reactant concentrations start high & _________ as the reaction proceeds. the forward rate, which depends on collision of the reaction, decreases. - correct answers decreases product concentrati...

Write the equation for AgCl (s) - correct answers AgCl (s) = Ag ^+1 + Cl ^- Write the equation for FeCl2 (s) - correct answers FeCl2 (s) = Fe ^2+ + 2Cl^- Write the equation for Al2 (CO3)3 - correct answers Al2 (CO3)3 = 2 Al ^3+ + 3 CO3^2- What is a solubility product constant? (Ksp) - correct answers measure of how much of the solid dissolves to form a saturated solution at equilibrium Write the Ksp for AB (s) = A^+ + B^- - correct answers [A^+][B-] What substances never show up i...

what is the purpose of today's lab? (Lab: analysis of copper in brass sample) - correct answers to calculate the percentage of copper present in a brass sample by using a spectrophotometer. what type of elements can you find in a brass sample?(Lab: analysis of copper in brass sample) - correct answers tin, lead, copper and zinc How is the concentration of copper (II) ions going to be determined in today's experiment? (Lab: analysis of copper in brass sample) - correct answers the mol...

Most of the H2 used in the Harber-Bosch process is produced by steam-reforming of methane followed by the water-gas shift reaction CO(g)+H2O(g) -> <- CO2(g)+H2(g) Kp= 10 at 400 degrees Celsius Suppose a reaction vessel at 400 degrees Celsius contains a mixture of CO, steam, and H2 at the concentrations shown in the ICE table shown below: A. Kp= (Pco2)(PH2)/(Pco)(PH2O) B. Kp= (Pco)(PH2O)/(PCO2)(PH2) C. Kp= (PCO2)(PH2)/(PCO) D. Kp= (PCO2)/(PCO)(PH2O) - correct answers Kp= (Pco2)...

1 - Scope 1-Which of the following activities is NOT included in the scope of API 570? - correct answers Operating a pipe system 2-Which of the following activities is NOT included in the scope of API 570? - correct answers Performing pipe fabrication 3-API 570 pertains to: - correct answers Only to metallic and FRP pipe 4-API 570 pertains only to: - correct answers Pipe and their associated relief devices 5-The inspector discovers a problem on a pipe that requires corrective action...

intramolecular forces - correct answers bonds that hold molecules together London Dispersion forces - correct answers arise from the flexing and bending of electron clouds dipole-dipole interactions - correct answers result from the opposite polar ends of a molecule interacting with each other hydrogen bonding interactions - correct answers capillary action - correct answers the tendency for a liquid to move up a solid medium surface tension - correct answers the ability of a liq...

Rate of reaction - correct answers factors that influence the ___ are concentrations of the reactions, physical state of the reactants, temperature, and time. Reaction rate - correct answers the change in concentration per unit of time. M/s Rate constant - correct answers constant of the proportionality between the reaction rate and the concentration of reactant. Rate Law - correct answers expresses the relationship of the rate of a reaction to the rate constant and the concentrations o...

ionic bond - correct answers metal + nonmetal covalent bond - correct answers nonmetal + nonmetal trend of electronegativity - correct answers inc up and inc to the right trend of ionization energy - correct answers dec down inc to the right if electronegativity is equal between atoms it is a ____ bond - correct answers non polar covalent if diff. in EN is greater than 0 but less than 2 it is a ____ bond - correct answers polar covalent if diff. in EN is greater than or equal t...

T/F: At equilibrium, the rate constant for the forward and reverse reaction are equal - correct answers False T/F: The half-life (t1/2) of a reaction is always independent of concentration - correct answers False T/F: Adding impurities to an amorphous solid lowers its melting temperature - correct answers True T/F: Increasing activation energy decreases the rate of a reaction - correct answers True T/F: Transition states are typically more stable than intermediates. - correct answers...

Colligative Properties - correct answers - Properties that depend on the concentration of solute particles but not on their identity. - Vapor pressure lowering, boiling point elevation, freezing point depression, and osmotic pressure. Colloid - correct answers A mixture of two or more substances mixed together that can be separated. ex. Milk (Protein and fat globules dispersed in liquid), Smoke (Solid soot particles dispersed in air), and Gelatin (water dispersed in a protein medium) Ca...

Water bugs would find it most difficult to walk on which liquid? - correct answers Cl2 If I wanted to look up the equilibrium constant (K) for the following reaction: AgCN (aq) <-> Ag+ (aq) + CN- (aq) Which table would you search for? - correct answers Kd table Which of the following can be used to make a buffer? - correct answers NH3/NH4+ Which describes the flow of electrons in a galvanic cell? - correct answers From the anode to the cathode through the external circuit ...

London Dispersion Forces - correct answers the force of attraction that arise as a result of temporary dipoles induced in the atoms of molecules, experienced by ALL molecules Dipole-Dipole Forces - correct answers forces that occur between polar molecules, A permanent dipole exists when one end of a molecule is electron deficient (partially positive) and the other end of a molecule is electron rich (partially negative) Hydrogen Bonding - correct answers a type of dipole-dipole interaction ...

According to the Arrhenius concept, an acid is a substance that __________ - correct answers causes an increase in the concentration of H+ in aqueous solutions A Bronsted-Lowry base is defined as a substance that __________. - correct answers acts as a proton acceptor What is the conjugate acid of NH3? - correct answers NH₄⁺ What is the pH of an aqueous solution at 25°C in which [H+] is 0.025 M? - correct answers 1.60 What is the pH of an aqueous solution at 25°C in which [OH...

Henry's Law - correct answers Raoul's Law - correct answers Pa= Vapor Pressure of Solution Xa= Mole Fraction of the Solvent Pa^o= Vapor Pressure of pure solvent Mole Fraction - correct answers X= Mole of Reactant/ mole of solution Molality - correct answers Molarity - correct answers % Mass - correct answers % Mass= Mass of component/Total mass x100 ppb - correct answers 1 µg in 1kg/L of solution (micrograms per liter) ppm - correct answers 15ppm = 15 mg in 1 kg/...