Question

Determine the number of molecules in 13.6 grams of CO₂.

Answer 1

Answer's in the pic sis. ^_^^_^

Answer 2

Answer:

The molecules in 13.6 grams of $CO_2$ is $1.862*10^{23}$

Explanation:

The molecular weight of $CO_2$=44g

No. of moles in 13.6 grams of $CO_2$=$\frac{weight}{molecular weight} =\frac{13.6}{44} =\frac{17}{55}$

Hence, no. of molecules= No. Of moles*Avogadro's number

=$\frac{17}{55} *6.022*10^{23}=1.862*10^{23}$

Hence the molecules in 13.6 grams of $CO_2$ is $1.862*10^{23}$

Characteristics of molecules

Dividing a sample of a substance into successively smaller parts does not cause any change either in its composition or in its chemical properties until the parts consisting of individual molecules are reached. Further division of the substance leads to even smaller parts, which usually differ from the original substance in composition and always differ from it in chemical properties. In this final stage of fragmentation, the chemical bonds that hold the atoms together in the molecule are broken.

Atoms consist of a single positively charged nucleus surrounded by a cloud of negatively charged electrons. When atoms come close together, the electron clouds interact with each other and with the nuclei. If this interaction is such that the total energy of the system is lowered, then the atoms combine to form a molecule. Thus, from a structural point of view, a molecule consists of an aggregation of atoms held together by valence forces. Diatomic molecules contain two atoms that are chemically bonded.

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