Chapter 9

Atomic Foundations of Matter

CBSE Class 9

Science Solutions

Question:

Write the chemical formulae for the following compounds.

(A) Aluminium nitrate

(B) Calcium oxide

(C) Ferric oxide

Answer: Verified

(A) The formula for aluminium nitrate:

Answer image

(B) The formula for calcium oxide:

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(C) The formula for ferric oxide:

Answer image

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(All Q's of this Chapter solved)

More NCERT Questions

Metal M, with two electrons in its valence shell (M shell), reacts with oxygen to form a compound that is slightly soluble in water. Predict its: (A) formula (B) type of bond (C) electrical conductivi Find the molecular mass of nitric acid (HNO3). Atomic mass — H = 1 u; N = 14 u; O = 16 u. [Pg. No. 179] Find the molecular mass of methane (CH₄). Atomic mass — C = 12 u; H = 1 u. [Pg. No. 179] An element X has six electrons in its outer shell and forms a diatomic molecule. (A) Why would that be so? (B) What kind of bond would it form? (C) Draw the structure of the molecule it would form. (D