Chemistry Questions

Classify each of these reactions. Pb ( NO 3 ) 2 ( aq ) + 2 KCl ( aq ) ⟶ PbCl 2 ( s ) + 2 KNO 3 ( aq ) C 2 H 4 ( g ) + 3 O 2 ( g ) ⟶ 2 CO 2 ( g ) + 2 H 2 O ( l ) Cu ( s ) + FeCl 2 ( aq ) ⟶ Fe ( s ) + CuCl 2 ( aq ) 2 KOH ( aq ) + H 2 SO 4 ( aq ) ⟶ K 2 SO 4 ( aq ) + 2 H 2 O ( l )
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An enzyme catalyzes a reaction with a K m of 6.50 mM and a V max of 4.25 mM ⋅ s − 1 . Calculate the reaction velocity, v 0 , for each substrate concentration.
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Using glucose as an example of food, calculate the annual human production of CO2 in grams, assuming that each person consumes 4.35 × 102 g of glucose per day. The world's population is 6.50 billion and there are 365 days in a year.
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A second-order reaction has a half-life of 12 s when the initial concentration of reactant is 0.98 M. The rate constant for this reaction is __________ M-1s-1.
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A series of experiments investigating the reaction of (CH3)3CCl with H2O to create (CH3)3OH produces a plot of Ln[(CH3)3CCl] vs. time that is linear with a negative slope. Suppose the reaction is carried out under conditions such that the half-life of the reaction is 2.20 x 102 s. What is the instantaneous rate of reaction when [(CH3)3CCl] = 0.15 M?
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When a 13.0g sample of NaOH(s) dissolves in 400.0 mL water in a coffee cup calorimeter, the temperature of the water changes from 22.6C to 30.7C. Assuming that the specific heat capiacity of the solution is the same as for water, calculate:_______. (a) the heat transfer from system to surroundings (b) change in H for the reaction NaOH(s) -----> Na+(aq) + OH-(aq)
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Question 4 of 15 2 Points If 100 joules of heat are added to a gas in an isochoric process, what is the change in its internal energy? O A. -100 O B. 300 j .2003 O D. 100
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A flask is filled with 6.0 atm of N2 and 6.0 atm of H2. The gases react and NH3 is formed. What is the pressure in the flask after the reaction occurs as completely as possible
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Of 0.605 g of magnesium hydroxide reacts with 0.800 g of sulfuric acid, what is the mass of magnesium sulfate produced? Steps would be appreciated! Thanks (:
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2.1. Three moles of an ideal gas (with temperature-independent CP = (7/2)R, CV = (5/2)R) is contained in a horizontal piston/cylinder arrangement. The piston has an area of 0.1 m2 and mass of 500 g. The initial pressure in the piston is 101 kPa. Determine the heat that must be extracted to cool the gas from 375°C to 275°C at: (a) constant pressure; (b) constant volume.
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Two proteins interact to form a multimeric complex. When one of the proteins is mutated, there is a substantial loss of functional activity in the multimeric protein. This type of mutation is classified as:_______.1. hypomorphic2. amorphic3. hypermorphic4. dominant negative5. neomorphic
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Coal can be used to generate hydrogen gas (a potential fuel) by the following endothermic reaction:C(s)+H2O(g) ------------->CO(g) + H2(g)If this reaction mixture is at equilibrium, predict whether each of the following will result in the formation of additional hydrogen gas, the formation of less hydrogen gas, or have no effect on the quantity of hydrogen gas:______.A. adding more C to the reaction mixtureB. adding more H2O to the reaction mixtureC. raising the temperature of the reaction mixtureD. increasing the volume of the reaction mixtureE. adding a catalyst to the reaction mixtureF. adding an inert gas to the reaction mixture
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Match the appropriate name for particle shown below. 42He 11H 00γ 0-1β 01e 10n A. Gamma photon B. Positron C. Beta particle D. Neutron E. Alpha particle F. Proton
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What is the hydrogen ion concentration of a solution with pH = 8.75 ?
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What is suspension in chemistry​
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Give reason :- Steam produce severe burns than boiling water.
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What statement is MOST accurate about a chlorine ion? A) The chlorine ion is a result of chlorine's relatively low electronegativity. B) The ionic radius of a chlorine ion is larger than the radius of a chlorine atom. C) The atomic radius of a chlorine atom is larger than the radius of a chlorine ion. D) Chlorine ions are created when a chlorine atom loses electrons forming compounds.
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How do you calculate the theoretical yield and percentage yield of a chemical equation?
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18 POINTSSSSSSSSSSSSSSSSSSS!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Asexual reproduction?
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8. 71.67 g of InBr2 was dissolved in water to a final volume of 650 mL. (A) What is the molar concentration of indium in the resulting solution? (B) If 25.0 mL of the solution in part A was diluted to 75.0 mL, what is the molar concentration of the resulting solution?
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For conduction to occur, particles must be . Word Bank: in contactnear each otherroundbig
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On a summer day, you take a road trip through Chelan, WA, in a Tesla Model S. You start out at a temperature of 19°C in the morning, but the temperature in Chelan will reach a peak of 55°C. Each tire on your car holds 16.2 L of nitrogen gas at a starting pressure of 245 kPa. The tires will burst if the internal pressure exceeds 265 kPa. Answer the following questions and show your work. (no work = no credit) given R = 8.31.
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The most common form of matter in the universe is _____. plasma gas liquid solid
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A change of state requires the addition or removal of heat energy. True False
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