3
Question
Correct the following statements:
(a) A molecular formula represents an element.
(b) Molecular formula of water (H2O) represents 9 parts by mass of water.
(c) A balanced equation obeys the law of conservation of mass and so does an unbalanced equation.
(d) A molecule of an element is always monoatomic.
(e) CO and Co both represent cobalt.
Correct the following statements:
(a) A molecular formula represents an element.
(b) Molecular formula of water (H2O) represents 9 parts by mass of water.
(c) A balanced equation obeys the law of conservation of mass and so does an unbalanced equation.
(d) A molecule of an element is always monoatomic.
(e) CO and Co both represent cobalt.
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Solution
(a) A molecular formula represents the molecule of an element or of a Compound.
(b) The molecular formula of water (H2O) represents 18 parts by mass of water.
(c) A balanced equation obeys the law of conservation of mass wherever unbalanced equation does not obey this law.
(d) A molecule of an element may be mono, di or polyatomic
(e) CO and Co represent carbon-monoxide and cobalt respectively
(a) A molecular formula represents the molecule of an element or of a Compound.
(b) The molecular formula of water (H2O) represents 18 parts by mass of water.
(c) A balanced equation obeys the law of conservation of mass wherever unbalanced equation does not obey this law.
(d) A molecule of an element may be mono, di or polyatomic
(e) CO and Co represent carbon-monoxide and cobalt respectively
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