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Questions in chemistry

[Terjawab] Based on the kinetic-molecular theory of matter, explain what happens to water molecules and to its properties during a phase change.

[Terjawab] The change in actual Gibbs energy for the translocation of 1 mole of H+ across the inner membrane is -20.8 kJ/mol. Using this value, what is the change in actual Gibbs energy for FADH2 oxidation? What is the efficiency of energy conversion by FADH2 oxidation at Complex II?

[Terjawab] Which term describes a pure substance that is made up of only one type of atom? A. matter B. rock C. compound D. element

[Terjawab] $700 cm^3$ of gas was collected at a temperature of $30^{\circ}$ and pressure of 450 mmHg. Convert the volume of this gas to STP.

[Terjawab] 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]

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

[Terjawab] 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.

[Terjawab] 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]

[Terjawab] 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

[Terjawab] 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 |