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Questions in chemistry

[Done] Which quantity is held constant when working with Boyle's, Charles's, and Gay-Lussac's laws? A. volume B. moles C. pressure D. temperature

[Done] Consider the reaction below. [tex]H_2(g)+CO_2(g) \rightarrow H_2 O(g)+CO(g)[/tex] At equilibrium at 600 K, the following are true. [tex]\begin{array}{l} {\left[CO_2\right]=9.5 \times 10^{-4} M} \ {\left[H_2\right]=4.5 \times 10^{-2} M} \ {\left[H_2 O\right]=4.6 \times 10^{-3} M} \ {[CO]=4.6 \times 10^{-3} M} \end{array}[/tex] What is the value of the equilibrium constant for this reaction in correct scientific notation? A. [tex]4.9 \times 10^{-3}[/tex] B. [tex]4.9 \times 10^{-2}[/tex] C. [tex]4.9 \times 10^{-1}[/tex]

[Done] Gas Laws Fact Sheet | Ideal gas law | [tex]$P V=n R T$[/tex] |

[Done] Mean value of temperatures = \(\frac{t_1 + t_2}{2}\) °C. Boiling point of water = ______ °C. The melting point of ice = ______ °C.

[Done] Select the most likely product for this reaction: [tex]LiOH ( aq )+ HNO _3( aq ) \rightarrow[/tex] ? A. [tex]CO _2(g)+ H _2 O ( l )[/tex] B. [tex]LiNO _3( aq )+ H _2 O ( l )[/tex] C. [tex]LINO _3( aq )+ H _2(g)+ O _2(g)[/tex]

[Done] Which of the following compounds contains the lead(II) ion? [tex]$Pb _2 O$[/tex] PbO [tex]$PbCl _4$[/tex] [tex]$Pb _2 S$[/tex]

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

[Done] 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?

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

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