AFNS — AFNS Chemistry
Basic Concepts
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#17 Isotopes have same:
A) Atomic number
B) Mass number
C) Neutrons always
D) Protons differ
Answer: A
#18 Isotopes differ in:
A) Number of neutrons
B) Number of protons
C) Atomic number
D) Nuclear charge
Answer: A
#19 Relative atomic mass is based on:
A) C-12 scale
B) H-1 only
C) O-16 only
D) Fe-56 only
Answer: A
#20 1 mole of any gas at STP occupies about:
A) 22.4 L
B) 11.2 L
C) 44.8 L
D) 2.24 L
Answer: A
#21 Percentage composition finds:
A) Mass % of elements
B) Volume only
C) Colour only
D) Boiling point
Answer: A
#22 Limiting reactant is:
A) Consumed first completely
B) In excess always
C) Catalyst
D) Product
Answer: A
#23 Stoichiometry uses:
A) Balanced equation ratios
B) Random guesses
C) Colour change
D) Temperature only
Answer: A
#24 Significant figures in 0.00450 are:
A) 3
B) 5
C) 2
D) 4
Answer: A
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