Inorganic Chemistry Answers

on a recent day the difference between the lowest temperature and the highest temperature of the day 9C. by how many degrees fahrenheit did the temperature change?

1. How scandium, a transition metal forms an ion with a noble gas structure.
2.  How the effective nuclear charge changes as you move from left to right across the periodic table and why?
3. The information that can obtained from a symbol of an element in the periodic table

what is the most important factor responsible for haemoglobin to act as oxygen carrier

A 20. L container is filled with helium and the pressure is 150 atm and the temperature is 30.° C. How many 5.0 L balloons can be filled when the temperature is 22° C and the atmospheric pressure is 755 mmHg? 

Please solve these questions, I try a lot to answer all of them but I couldn’t answer it.

Thanks in advance.

Propanoic acid (C₂H₅COOH) is described as a weak acid. Define the term weak acid.

Write a balanced chemical equation to show the dissociation of propanoic acid (C₂H₅COOH). Physical states must be included.

A solution of propanoic acid and sodium propanoate (C₂H₅COONa) behaves as a buffer. Describe the term buffer solution. No chemical equations are needed.

Write a balanced chemical equation to show the dissociation of sodium propanoate (C₂H₅COONa). Physical states must be included.

Explain how a solution containing propanoic acid and sodium propanoate can function as a buffer solution. Your answer must include balanced chemical equations, physical states included.

___Fe2O3(s) + ___CO(g) à ___Fe(s) + ___CO2(g) 

How many grams of iron metal can be produced from the reaction of 10.0 grams of iron (III) oxide and carbon monoxide? 

How many grams of iron metal can be produced from the reaction of 10.0 grams of carbon monoxide with iron (III) oxide? 

Compare the amount of iron produced in parts a and b. Which is less? 

What is the limiting reactant? 

What is the excess reactant? 

What is the theoretical yield of iron in this reaction? 

How many grams of limiting reactant are unused when the reaction is complete? 

How many grams of the excess reactant are unused when the reaction is complete? 

the metabolism of glucose in a living cells provides energy for their functioning. how many grams of oxygen are used in the metabolism of 1.009 glucose?

Dear Sir/Madam

can you please answer this question for me.

thanks in advance

​1-Chloropropane was hydrolysed by an aqueous potassium hydroxide solution. 

   C3H7Cl   +  KOH   →    C3H7OH    +   KCl  

​​   1-Chloropropane​           Propan-1-ol

​During the reaction, the reactant potassium hydroxide is used up. Samples of the reaction mixture were drawn off at regular time intervals and analysed by titration with standard hydrochloric acid to find out the concentration of KOH. 

    The results are given in the table below:

Time / s

Concentration of OH-  / mol dm-3

0.500

100

0.350

200

0.250

300

0.180

400

0.125

500

0.090

600

0.063

       700

0.040

800

0.030

​​​​​

(a)

From the above information, Plot a Concentration of OH- (mol dm-3) against Time (s) graph. The graph MUST be a hand drawn (plotted) graph. 

(b)

Select 4 suitable points along your graph [see part (a)] and draw tangents to find the rates. Construct a table of “Rate” against “Concentration”. Note: The rates need to be calculated and the calculations shown.

(c)

Plot a graph of Rate against Concentration of OH-. The graph MUST be a hand drawn (plotted) graph.

(d)

From your graph in part (c) deduce the Order of Reactionwith respect to OH- (hydroxide ions).

(

(e)

Write a rate equation with respect to concentration of hydroxide ions.

(f)

Calculate the rate constant k from the gradient of the graph, drawn in part (c). Show and explain your working.

Answer the following stoichiometry questions by referring to the equation below:

2  KClO₃  →  2 KCl + 3 O₂

i.      If 1.50 mol of KClO₃ decomposes, what is the mass of O₂ that will be produced?

ii.     If 80.0 grams of O₂ was produced, how many moles of KClO₃ are decomposed?

iii.    Find the mass of KClO₃ needed if we need to produce 2.75  mol of KCl.

The chromatograms in the picture below show the separation of a two-component mixture. The Liquid

Chromatography column is 25 cm long. The flow rate was 0.40 ml/min. Using the chromatograph to

answer the following questions.

Source: Test Bank Hage/Carr Analytical Chemistry & Quantitative Analysis C. McLaughlin

1. Determine the dead time of the chromatographic analysis

(1 marks)

2. Determine the retention time of compounds A and B

(2 Marks)

3. Calculated the adjusted retention time of the compound A and B

(2 marks)

4. Calculated the capacity factor (k’) for compounds A and B

(4 marks)

5. Calculate the selectivity factor between peaks A and B

(2 marks)

6. Discuss the influence of reducing the flowrate on selectivity factor

(5 Marks)

7. Discuss the separation between compound A and B as shown on the chromatograph

(3 Marks)

8. Calculate the number of theoretical plates involved in the separation of A and B