Question

Following are atomic masses of a few elements in Dalton and the molecular formulae of some compounds
Deduce the molecular masses of those compounds.
Atomie masses H(1), (16), N(14), C(12), K(39), S(32) Ca(40), Na(23), CI(35.5),
Mg(24). Al(27)
Molecular formulae → NaCI, MOCI,, KNO,H,O, AICI, Ca(OH),, MgO, H,SO,
HINO, NaOH​

Answer 1

answer:-given:MOLECULAR FORMULAE:-

Explanation:

1)NaCl(sodium chloride)

:-molecule :-sodium chloride(NaCl)

constituents elements:-Na(sodium)Cl(chlorine)

Atomic masses:-Na:-23, Cl:-35.5

No.of atoms in the molecule:-Na:1, Cl:1

atomic mass×no.of atoms:-Na:-23×1, Cl:-35.5

mass of the constituents:-Na=23, Cl=35.5

MOLECULAR MASS =SUM OF ATOMIC MASSES

MOLECULAR MASS OF NaCl=(atomic mass ofNa)×1+(atomic mass of Cl)×1

=(23×1)+(35.5)×1

=58.5 u

:-molecular mass of NaCl=58.5 u

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Answer 2

Answer:

h1Atomie masses H(1), (16), N(14), C(12), K(39), S(32) Ca(40), Na(23), CI(35.5),

Mg(24). Al(27)

Molecular formulae → NaCI, MOCI,, KNO,H,O, AICI, Ca(OH),, MgO, H,SO,

HINO, NaOH