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how much heat energy is used to vaporize 3.5 mol of chloroethane at its normal boiling point 12.3°c given Hvap= 24.7k/mol
Appropriate reaction mechanism for paracetamol and esterification
Identify and describe the reaction that happens
Describe how you carried out the reaction
Conditions of them both
1. Answer the problem using the step by step process.
2. Write the 3 digits after the decimal point. ( NO ROUND OFF )
3. Box your answer.
Given:
1 = 2.5 ohms
2 = 3 ohms
3 = 1.7 ohms
4 = 3.7 ohms
5 = 9 ohms
6 = 4.5 ohms
7 = 5 ohms
8 = 7.8 ohms
9 = 13 ohms
Voltage total = 100 volts
Solve for:
Resistance total
Current total
Voltage from 1 to 9
Current from 1 to 9
PLEASEEEEE ANSWER ASAP!
Consider the reaction: 2C2H2(g) + 3O2(g) → 4CO2(g) + 2H2O(l);
ΔHfº C2H2(g) = 54.20 kJ/mol
ΔHfº H2O(l) = –68.30 kJ/mol
ΔHfº CO2(g) = –94.10 kJ/mol
(i) What is the standard enthalpy of formation of O2? Answer
kJ/mol
(ii) What is the standard enthalpy change for this reaction? Answer
kJ
Show the solution in calculating the pH for the following data:
- Vol NaOH = 0.00, pH = 3.30
- Vol NaOH = 24.90, pH = 5.87
- Vol NaOH = 26.00, pH = 9.12
how many grams of water can be heated from 20.0 c to 50.0 c using 12500.0 joules
Given the following, find the number of moles:14.2g of Co2
A. 0.32
B. 0.32 mol CO2
C. 0.4 mol CO2
D. 1.00 mol CO2
A 0.8160-g sample containing dimethylphthalate, C6H4(COOCH3)2 (194.19 g/mol), and un-reactive species was refluxed with 50.00 mL of 0.1031 M NaOH to hydrolyze the ester groups (this process is called saponification).
C6H4(COOCH3)2 ⫹ 2OH⫺ : C6H4(COO)2⫺ 2 ⫹ 2CH3OH
After the reaction was complete, the excess NaOH was back-titrated with 24.27 mL of 0.1644 M HCl. Calculate the percentage of dimethylphthalate in the sample.
Before glass electrodes and pH meters became widely used, pH was often determined by mea-suring the concentration of the acid and base forms of the indicator colorimetrically. If bromothymol blue is introduced into a solution and the concentration ratio of acid to base form is found to be 1.43, what is the pH of the solution?
If 1.000 L of 0.1500 M NaOH was unprotected from the air after standardization and absorbed 11.2 mmol of CO2 , what is its new molarity when it is standardized against a standard solu-tion of HCl using
(a) phenolphthalein?
(b) bromocresol green?
