iran-konkur 2018 Q213

iran-konkur · Other · konkur-riazi_1397_specialized Not Maths
213 -- Considering the number of atoms forming one molecule of a chemical substance (according to the figure below), how many of the following statements are correct? ($\text{H} = 1,\ \text{C} = 12,\ \text{O} = 16\ \text{: g.mol}^{-1}$)
[Figure: Ball-and-stick model showing C, H, and O atoms]
  • It is benzaldehyde molecule.
  • It is a chain compound.
  • Approximately 35.56\% of its mass is oxygen.
  • The ratio of the mass of carbon atoms to the mass of hydrogen atoms in it is 13/5.

(1) 1 (2) 2 (3) 3 (4) 4
\textbf{213 --} Considering the number of atoms forming one molecule of a chemical substance (according to the figure below), how many of the following statements are correct? ($\text{H} = 1,\ \text{C} = 12,\ \text{O} = 16\ \text{: g.mol}^{-1}$)

\begin{center}
\textit{[Figure: Ball-and-stick model showing C, H, and O atoms]}
\end{center}

\begin{itemize}
    \item It is benzaldehyde molecule.
    \item It is a chain compound.
    \item Approximately 35.56\% of its mass is oxygen.
    \item The ratio of the mass of carbon atoms to the mass of hydrogen atoms in it is 13/5.
\end{itemize}

\hspace{2cm} (1) 1 \hspace{2cm} (2) 2 \hspace{2cm} (3) 3 \hspace{2cm} (4) 4