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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

Write the Molecular Formulae Of:

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प्रश्न

Write the molecular formulae of Iron (III) sulphide:

एका वाक्यात उत्तर
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उत्तर

Iron (III) sulphide - `"Fe"_2 ("SO"_4)_3`

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पाठ 4: Atoms, Molecules and Radicals - Exercise

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सेलिना Concise Chemistry [English] Class 7 ICSE
पाठ 4 Atoms, Molecules and Radicals
Exercise | Q 9.07

संबंधित प्रश्‍न

Write the molecular formulae of Hydrogen chloride :


Write the molecular formula of sulphuric acid.


Write the molecular formulae of Aluminium sulphate :


The valency of sodium is one, write the molecular formula for sodium oxide ?


The valency of sodium is one, write the molecular formula for sodium hydroxide ?


State the term

The combining capacity of an element _______


Write the cations and anions present, if any, in the following : 

  1. CH3COONa 
  2. NaCl
  3. H2
  4. NH4NO3

Fill in the following blanks :

1 mole contains .............. atoms, molecules or ions of a substance.


If 1 gram of sulphur dioxide contains x molecules, how many molecules will be present in 1 gram of oxygen ?

(S = 32 u ; O = 16 u)


Which contains more molecules, 10 g of sulphur dioxide (SO2) or 10 g of oxygen (O2) ?

(Atomic masses : S = 32 u ; O = 16 u)


What is the number of electrons donated by a magnesium atom and number of electrons accepted by a sulphur atom during their chemical combination?


Diagrammatically represent the transfer of electrons.


‘Atoms of the same element or different from Dalton’s atomic theory by the Modern Atomic Theory.
Give two examples each of –

  • Atoms of the same element
  • Atoms of different elements combining to form a molecule.

‘Dilute hydrochloric acid is added to sodium hydroxide’. Give a word equation and a molecular equation of the same. Is the equation written, a balanced equation. Give reasons.


Express each of the following in kilograms

5.84 × 10−3 mg


Compute the number of ions present in 5.85 g of sodium chloride


______ of an element consist of a fixed number of different types of atom.


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