Stoichiometry - Jamb Chemistry Past Questions and Answers

Question 116:

• JAMB 2019

By what amount must the temperature of 200cm\(^3\) of Nitrogen at 27°C be increased to double the pressure if the final volume is 150cm\(^3\) (Assume ideality)

A. 150°C
B. 177°C
C. 75°C
D. 120°C

Question 117:

• JAMB 2020

The number of molecules of Carbon(iv)Oxide produced when 10.0g of CaCO\(_3\) is treated with 0.2dm\(^3\) of 1 Mole of HCL in the equation
CaCO\(_3\) + 2HCL ⇒ CaCl\(_2\) + H\(_2\) O + CO\(_2\) , is ?

A. 1.00 X 10\(^{23}\)
B. 6.02 X 10\(^{23}\)
C. 6.02 X 10\(^{22}\)
D. 6.02 X 10\(^{24}\)

Question 118:

• JAMB 2020

A gaseous metallic chloride MCl consists of 20.22% of M by mass. The formula of the chloride is?
[ M = 27, Cl = 35.5]

A. MCl
B. MCl\(_2\)
C. MCl\(_3\)
D. M\(_2\)Cl\(_6\)

Question 119:

• JAMB 2021

A solution contains 20g of solute in 180g of solvent. If the solvent is water, what is the concentration of the solution in terms of mass by mass percentage

A. 11.%
B. 22.2%
C. 10%
D. 20%

Question 120:

• JAMB 2021

220g of carbon dioxide contains ----- moles

A. 5
B. 6
C. 3
D. 4