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An experimental data on the reaction of H2 and PO3-3 is given below:
Initial [PO3-3]
Initial [H2]
Initial Rate
Experiment 1
0.100
0.100
1.50
Experiment 2
0.200
0.100
3.00
Experiment 3
0.100
0.200
6.00
a) What is the order of reaction with respect to [PO3-3]?
b) What is the order of reaction with respect to [H2]?
c) What is the overall reaction?
A solution is prepared at 20oC and its concentration is expressed in two different units; Molarity and Molality. The solution is then heated to 88oC. Which of the concentration units will change?
A GROUP OF STUDENT GOT THE FOLLOWING SCORES IN A TEST 6, 9, 12, 15, 18, AND 21. CONSIDER SAMPLE SIZE 3 THAT CAN BE DRAWN FROM THIS POPULATION.
The tallest living man at one time had a height of 231 cm. The shortest living man at that time had a height of 142.1 cm. Heights of men at that time had a mean of 172.16 cm and a standard deviation of 5.22 cm. Which of these two men had the height that was more extreme?
1.If sin = 12, and is in QI, find sec data .
2.Given cos =35 , is in QIV, find csc data.
3.Find the exact values of the circular functions whose =-3π/4.
a) If 28 counters are a whole set, how many are there in five sevenths of the set?
b) If 32 counters are four fifths of a set, how many counters are in a full set? Illustrate the your answer.
The difference between the ice point and steam point in a liquid in glass thermometer is 30cm. What temperature is recorded when the mercury thread is 10cm above the ice point?
Calculate the voltage that would result if the following half-cells were combined. Identify which reaction is oxidation and which is reduction. Also label the anode and the cathode.
- Zn ⟶ Zn2+ + 2e-
Cu ⟶Cu2+ + 2e-
- Au ⟶ Au3+ + 3e-
Ag ⟶ Ag+ + 1e-
What is the pH of a buffer made up of 0.5M NH3 and 0.456M NH4CI? pKb NH3= 4.74
1. What is the pH of a solution with [H^ + ] of 1.0*10^ -9 M? What is its pOH? (Kw=[H^ + ][OH^ - ])
2. The [H3O^ + ] of a solution is 1.3 x 10 ^ - 5 , Calculate the [OH^ - ], pH and pOH of the solution. Is the solution acidic or basic?
3. The pH of a solution is 8.7. What are the pOH, [H3O^+] and [OH^-] of the solution?
#339914 on Dec 2023