Questions: An analytical chemist measures the amount of Elements E₁ and E₂ in four samples of an unknown Substance X: sample mass of E₁ mass of E₂ -------------------------------- 1 7.5 g 25.4 g 2 5.9 g 20.1 g 3 4.3 g 14.6 g 4 5.6 g 19.3 g It's known that X contains no elements other than E₁ and E₂. Using this information, answer the questions in the table below. Question Answer -------------------------------------------------------------------------------------------------------------------------------------------------- Is X a pure substance or a mixture? If you don't have enough information to decide, choose can't decide. pure substance mixture (can't decide) If you said X is a pure substance, calculate the mass of element E₁ the analytical chemist would find in a new 10.0 g sample of X. Round your answer to 2 significant digits. □ g

Transcript text: An analytical chemist measures the amount of Elements $E_{1}$ and $E_{2}$ in four samples of an unknown Substance $X$ : \begin{tabular}{|c|c|c|} \hline sample & \begin{tabular}{c} mass \\ of $E_{1}$ \end{tabular} & \begin{tabular}{l} mass \\ of $E_{2}$ \end{tabular} \\ \hline 1 & 7.5 g & 25.4 g \\ \hline 2 & 5.9 g & 20.1 g \\ \hline 3 & 4.3 g & 14.6 g \\ \hline 4 & 5.6 g & 19.3 g \\ \hline \end{tabular} It's known that $X$ contains no elements other than $E_{1}$ and $E_{2}$. Using this information, answer the questions in the table below. \begin{tabular}{|c|c|} \hline \begin{tabular}{l} Is $X$ a pure substance or a mixture? \\ If you don't have enough information to decide, choose can't decide. \end{tabular} & \begin{tabular}{l} pure substance \\ mixture \\ (can't decide) \end{tabular} \\ \hline \begin{tabular}{l} If you said $X$ is a pure substance, calculate the mass of element $E_{1}$ the \\ analytical chemist would find in a new 10.0 g sample of $X$. \\ Round your answer to 2 significant digits. \end{tabular} & $\square \mathrm{g}$ \\ \hline \end{tabular}