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2376
What volume will 0.5 g of H
2
occupy at s.t.p? [H = 1; 1 mole of a gas occupy 22.4 dm
3
at s.t.p.]
A.
2.24 dm
3
B.
5.60dm
3
C.
11.20dm
3
D.
44.80dm
3
View Answer & Discuss (3)
WAEC 2007
2377
Which of the these metals will not liberate hydrogen from dilute HCI?
A.
Copper
B.
Iron
C.
Magnesium
D.
Zinc
View Answer & Discuss (1)
WAEC 2007
2378
The mass spectrometer can be used to measure mass of
A.
an atom
B.
an electron
C.
a proton
D.
a neutron
View Answer & Discuss (3)
WAEC 2008
2379
Find the number of neutrons in an atom represented by 45
21
X.
A.
21
B.
24
C.
45
D.
66
View Answer & Discuss (1)
WAEC 2008
2380
The valence electrons in a chloride ion are [
17
CI]
A.
2p electrons only
B.
3s and 3p electrons only
C.
3p and 3d electrons only
D.
3p electrons only
View Answer & Discuss (4)
WAEC 2008
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