Which is a property of every mixture? One substance dissolves in another substance. The molecules of one substance break down in the other. Different samples of a single mixture have different characteristics. One substance can be separated from another through physical means.

Using atomic notation, indicate the isotope having $11p^{+},12n^{0}$ and 11 $e^{-}$ Na $Na+$ $Na2+$ Mg $Mg2+$

Value: 4 Which of the following represents the number of the molecules, of the type indicated, is present as a reactant or product of the chemical reaction shown? a. Coefficient b. Subscript c. Symbol d. Product

Silver has an atomic mass of 107.868 amu. The Ag-109 isotope (108.905 amu) is $48.16\% $ What is the amu of the other isotope? 107.1 amu 106.9 amu 106.7 amu 107.3 amu

Provide the condensed structures of two structurally isomeric amines that contain two carbons. Express your answers as chemical formulas separated by a comma. $\square $

7. When given a simple chemical reaction, identify the reactant(s) and product(s). (Try the examples below.) $2H_{2}+O_{2}\rightarrow 2H_{2}O$ b $C_{3}H_{8}+5O_{2}\rightarrow 3CO_{2}+4H_{2}O$ C. $NH_{3}+5O_{2}\rightarrow 4NO+6H_{2}O$

Which of the following ions of titanium would have the same electron configuration as Ar? \begin{array}{|c|c|} \hline \ &\ Answer:\ \\ \hline A\ &\ \(\ \mathrm{Ti}^{+}\ \)\ \\ \hline B\ &\ \(\ \mathrm{Ti}^{2+}\ \)\ \\ \hline C\ &\ \(\ \mathrm{Ti}^{3+}\ \)\ \\ \hline D\ &\ \(\ \mathrm{Ti}^{4+}\ \)\ \\ \hline \end{array}

The usual oxidation number of oxygen in its compounds is __ 2 $-2$ $-1$

Twelve different pictograms are used to provide a visual cue regarding chemical hazards True False

Balance the following chemical equation. Do not include states of matter. $Al+H_{2}Cl\rightarrow AlCl_{3}+H_{2}$

What organic solvent will you extract the product into? Dichloromethane Diethyl Ether Ethyl Acetate Brine (Aqueous NaCl)