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Questions in chemistry

[Done] Select the most likely product for this reaction: [tex]AgNO _3( aq )+ NaOH ( aq ) \rightarrow[/tex] ? A. [tex]AgOH ( s )+ NaNO _3( aq )[/tex] B. [tex]Ag _2 O ( S )+ HNO _3( aq )[/tex] C. [tex]Ag ( s )+ H _2(g)+ O _2(g)[/tex]

[Done] To what volume should 250 cm³ of 2M HCl be diluted in order to obtain a 0.1M solution of acid?

[Done] Which statement correctly describes a chemical reaction? A. Reactants come out of a reaction. B. Energy is always released. C. Bonds between atoms break and reform. D. Products go into a reaction.

[Done] Look at the reaction below. [tex]H_2 SO_4(a q)+Ca(OH)_2(a q) \longrightarrow CaSO_4(a q)+2 H_2 O(l)[/tex] Which substance is the base in the reaction? A. [tex]2 H _2 O ( l )[/tex] B. [tex]H _2 SO _4(a q)[/tex] C. [tex]CaSO _4(a q)[/tex] D. [tex]Ca ( OH )_2(a q)[/tex]

[Done] Consider the following standard electrode potentials: [tex]$\begin{array}{l}< Mg^{2+}+2 e^{-} \longrightarrow Mg E^{\circ}=-2.37 v \\ Cg^{2+}+e^2 \longrightarrow Ce^{\circ}=+1.61 v \end{array}$[/tex] i. Write the cell notation for the voltaic cell

[Done] Answer the questions in the table below about this molecule: | What is this molecule's chemical formula? Note: write the simplest molecular chemical formula, in which each element symbol appears only once. | $\square$ | | How many $CH _3, CH _2$, and CH groups are in this molecule? | $\square$ $CH _3$ $\square$ $CH _2$ $\square$ CH |

[Done] If you need to reverse the following reaction in order for it to be an intermediate reaction in a Hess's law problem, what would be the final value for the enthalpy of reaction you use for this intermediate reaction? [tex]C_2 H_4+3 O_2 \rightarrow 2 CO_2+2 H_2 O, \Delta H=-1410 kJ[/tex] A. 2820 kJ B. -2820 kJ C. 1410 kJ D. -1410 kJ

[Done] What is the temperature of 0.80 mol of a gas stored in a 275 mL cylinder at 175 kPa? Use [tex]$P V=n R T$[/tex] and [tex]$R=8.314 \frac{L \bullet kPa }{ mol \bullet K }$[/tex]. A. 4.6 K B. 7.2 K C. 61 K D. 96 K

[Done] What did the early atomic theory accomplish? A. It started scientific thought about the structure of the atom. B. It established the idea that matter cannot be created or destroyed. C. It provided an accurate description of the atom. D. It proved that the atom was the smallest form of matter.

[Done] Which statement best explains how the solution should be made? A. Add 1.5 mL of [tex]$0.50 M H _2 SO _4$[/tex] to 10.5 mL of water to get 12 mL of [tex]$4 M H _2 SO _4$[/tex]. B. Add 1.5 mL of [tex]$4.00 M H _2 SO _4$[/tex] to 10.5 mL of water to get [tex]$12- mL$[/tex] of [tex]$0.50 M H _2 SO _4$[/tex]. C. Add 1.5 mL of [tex]$4.00 M H _2 SO _4$[/tex] to 12 mL of water to get [tex]$0.50 M H _2 SO _4$[/tex].