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[ Post UTME Begins ]:
View The List Of Schools That Have Released 2026 Post-UTME Forms.
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Matter and Separation Techniques
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BASIC CHEMISTRY
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Introduction to the tetravalency of carbon
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2531
What is the amount of magnesium that would contain 1.20 x 10
24
particles? [Mg = 24, Avogadro's constant = 6.02 x 10
23
]
A.
0.5 moles
B.
2.0 moles
C.
12.0 moles
D.
24.0 moles
View Answer & Discuss (7)
WAEC 2011
2532
The number of atoms in one mole of a substance is equal to the
A.
mass number
B.
oxidation number
C.
atomic number
D.
avogadro number
View Answer & Discuss
WAEC 2011
2533
Which of the following statements about a molar solution is correct? it
A.
is a supersaturated solution
B.
cannot dissolve more of the solute at that temperature
C.
contains any amount of solute in a given volume of solution
D.
contains one mole of the solute in 1 dm
3
of solution
View Answer & Discuss
WAEC 2011
2534
A gas that is collected by upward delivery is likely to be
A.
heavier than air
B.
insoluble in water
C.
lighter than air
D.
soluble in water
View Answer & Discuss (9)
WAEC 2011
2535
Bubbling excess carbon (IV) oxide into calcium hydroxide solution results in the formaton of
A.
CaO
B.
Ca(HCO
3
)
2
C.
H
2
CO
3
D.
CaCO
3
View Answer & Discuss (7)
WAEC 2011
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