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सी.आई.एस.सी.ई.आयसीएसई ICSE Class 7

What Does 2c02 Represent ? - Chemistry

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प्रश्न

What does 2C02 represent ?

एका वाक्यात उत्तर
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उत्तर

2C02 = 2 molecules of carbon dioxide.

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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 3.1

संबंधित प्रश्‍न

How many atoms are present in a H2S molecule?


Write the molecular formulae of Sodiun sulphide: 


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


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


Calculate the number of molecules present in a drop of chloroform (CHCl3) weighing 0.0239 g.

(Atomic masses : C = 12 u ; H = 1 u ; Cl = 35.5 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?


How many units of charge are developed on each atom?


Write the molecular formulae of Magnesium nitride:


Fill in the blank:

A molecule of an element is _________.


Name the following:

The compound formed when iron [Fe2+] combines with oxygen [O2−].


Name the following:

A non-metal which forms a polyatomic molecule with more than three atoms.


State true of false. If false, give the correct statement.

Atoms cannot exist alone. They can only exist as groups called molecules.


How many atoms are present in a PO4 3– ion?


How many atoms are present in a `PO_4^(3-)` ion?


Express each of the following in kilograms

58.34 g


Express each of the following in kilograms

5.873×10−21g


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


A molecule containing three atoms is called a ______ molecule.


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