A solvent is a mixture consist of 2 or more substances FALSE O TRUE
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- Engineering Mehcanics - Equilibrium note: with slight explanations to understand the solutionDoes the size of an ion affect the magnitude of the activity for varying ionic strengths? Does the activity coefficient depend on whether the ion is a cation or an anion?[4] The comes from . the collision of electrons with atoms and molecules O voltage O current resistance O conductance None of the above
- A bar with a constant cross section A is fixed at both ends. The bar is made of two different materials, that are joint together at point C. 1. a) What are the reaction forces, if an external force F is applied at point C? 2. b) Determine the normal force that is caused by a pure heating by AT. Est EAI ast Given: = 3, C a –-|e l– a → F- Steel AluminiumCalculate the dosage of activated carbon to reduce an influent (flowrate = 10 mgd) concentration of 300 µg/L of chloroform to 100 µg/L using powderFor alloys of two hypothetical metals A and B, there exist an a, A-rich phase and a ß, B-rich phase. From the mass fractions of both phases for two different alloys (given below), which are at the same temperature, determine the composition of the phase boundary (or solubility limit) for the following: Fraction Fraction Alloy Composition a Phase B Phase 60 wt% A - 40 wt% B 0.59 0.41 30 wt% A - 70 wt% B 0.13 0.87 (a) a phase wt% A (b) B phase wt% A
- At pH 5-7 aluminum hydroxide is O readily exceeding water quality limits for aluminum O leaving a foul taste in the water O in its least soluble form O ineffective as a coagulant8 Induction hardening and flame hardening are two heat treatment methods that can be used to increase wear resistance of a material's surface while keeping the inner core tough. Which of the following is true? (A) Induction hardening uses an electric current. (B) Flame hardening requires a longer quench time. (C) Induction hardening has a lower operating temperature. (D) Flame hardening results in smaller grains in its structure. jes (A) emsed anilisted (81) sig auc agniwash evilosque (0) grinore 2 (C)A mineral is an organic substance having usually a definite chemical composition and physical properties. It has .always homogeneous in nature True O False O
- The compound calcium nitrate, Ca(NO3)2 is soluble in water. Write the formulas for the ions that interact with water as shown in the models when solid calcium nitrate dissolves in water: (Do not include the stoichiometries in the formulas.) Interaction Model Ion FormulaH.W3: Predict the ideal solubility of lead in bismuth at 280°C given that its melting point is 327°C and its enthalpy of fusion is 5.2 kJ mol-1, M.wt Bi=209 g/mol, M.wt Pb=209 g/mol.Determine the components of reactioe atC. SON