2.3.1 Write down the chemical formula of the substance in which the ratio is:
This chemistry question involves key chemical concepts and calculations. The detailed solution below walks through each step, from identifying the reaction type to computing the final answer.
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2.3.1 Write down the chemical formula of the substance in which the ratio is:
a) 1:1
For NaCl (Sodium chloride), the ratio of Na:Cl atoms is 1:1.
Answer: $\boxed{\text{NaCl}}$
b) 2:1
For H$_2$O (Water), the ratio of H:O atoms is 2:1.
Answer: $\boxed{\text{H}_2\text{O}}$
c) 1:2
For CO$_2$ (Carbon dioxide), the ratio of C:O atoms is 1:2.
Answer: $\boxed{\text{CO}_2}$
d) 2:1:4
For H$_2$SO$_4$ (Sulphuric acid), the ratio of H:S:O atoms is 2:1:4.
Answer: $\boxed{\text{H}_2\text{SO}_4}$
2.3.2 What is the ratio in CaCO$_3$?
In the chemical formula CaCO$_3$:
There is 1 Calcium (Ca) atom.
There is 1 Carbon (C) atom.
There are 3 Oxygen (O) atoms.
The ratio of Ca:C:O atoms is 1:1:3.
Answer: $\boxed{\text{1:1:3}}$
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