Kinetics at Work

This is not graded! Strictly for practice. Do questions 6-10

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16. The concentration of a 1500mL aqueous KCI solution was increased from 25.0 M to 80.0 M by evaporation. How much H20 was removed? (MW: K=39g/mol. Cl=35g/mol, H=1g/mol, 0=16g/mol) A. 1.03 L B. 0.47 L C. 1968.75 mL D. 4.68.75 mL 17. Suppose that 15M of Načl solution with a volume of 15L is heated and loses 2000ml of its water content. What would be the final concentration of your NaCI sample? (MW: Na-23g/mol, Cl-35g/mol, H=1g/mol, 0=16g/mol) A. 3.75 M B. 0.0375 M C. 37.5 M D. 375.0 M 18. How much ml of ethanol is needed to make 2000ml of an aqueous 15% (v/v) solution? A. 3000 mL B. 300 mL C. 30 mL D None of the above 19. What mass of HClis needed to make 3000g of 3% solution? (MW: H-1g/mol, Cl=35g/mol) A 0.09 gram 90 grams C 0.1 gram 10 grams B.

Please send me the question in 20 minutes it's very urgent plz both 1 and 2

Help with 18 please.

What is the purpose of staggering the start and stop of the reactions?

What happens when a solution of an acid is mixed with a solution of a base in a test tube? (i) Temperature of the solution decreases. (ii) Rate of reaction increases. (ii) Temperature of the solution remains the same. (iv) Salt formation takes place. Select one: O a. (1) & (iii) O b. (1) & (iv) O c. (iv) d. (ii) only

A Hide Time Remaining A From the list below select a compound that is the strongest electrolyte (produces the highest concentration of ions when mixed with water)? O A BaCl2 O B. KBr OC PbCl2 O D. AgCl O E. CaF2 Reset Selection EXTD 1 5:05 DELL

A student wanted to investigate the concentration of glucose in different energy drinks. The student first produced four glucose solutions of different, known concentrations by diluting a 4.0 mM glucose solution. The volumes of distilled water and glucose solution added to each test tube can be seen in Table 1. The total volume of each solution was 10 Table 1 Final concentration of glucose solution / mM Volume of distilled water/ cm Volume of glucose solutic 4.0 0.0 10.0 5.0 5.0 2.5 7.5 1.25 8.75 Complete Table 1 by filling in the three blank spaces with the correct final concentrations of glucose solution.

Find the Final volume of buret (mL) and the Concentration of NaOH (M )

CHM 17 Experiment #8   CONCENTRATION OF A SOLUTION   Discussion   This virtual experiment involves the determination of the conc­entration of salt (sodium chloride, NaCl) in an aqueous solution.  Concentration may be expressed many ways, and this experiment studies two systems: molarity (M) and weight/volume percent (%w/v).   Molarity is defined as the number of moles of solute (in this case NaCl) in a liter of solution. It is calculated with the following equation:                                                   M = moles solute                                                                 liters solution                                      Percent concentration (w/v) is defined as the number of grams of solute (in this case NaCl) in 100. mL of solution. It is calculated with the following equation:                                             %(w/v) =  grams solute  x  100                                                             mL solution   The experimental method…

02 --> MgO* 13. Balance the following equation: Mg + Your answer 14. Using the equation in number 13, when 0.25 moles of Mg reacts with exce oxygen, how many moles of MgO are produced? (Hint: 1 step conversion) 0.50 moles Mgo 0.25 moles Mgo 1.0 moles Mgo O 0.75 moles MgO 15. What is the pressure of a 2.0L container that holds 0.78 moles of hydroc gas at 34 degrees Celsius? (R= 0.0821 L atm/K mol).* O 9.8 atm 1.09 atm 4.35 atm 39.3 atm

Name: Chapter 8 Homework Text problems: 58, 60,62, 64, 66, 68, 74, 76, 86, 98,100 1. Write equation for the following substances dissolve in water a. Na2SO4(s) b. C12H22O11(s) c. Ca(NO3)2(S) d. CH3OH (1) In the above questions, label the compounds that created electrolytes in water