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Questions in chemistry

[Terjawab] Calculate the specific heat of reaction of C3H8(l) at standard state for the following reaction using the data given in the table below: C3H8(l) + O2(g) → CO2(g) + 4H2O(l) | Compound | -ΔHf° [kcal/gmol] | ΔHvaporization at 25°C [kcal/gmol] | |---|---|---| | C3H8(l) | - | 3.823 | | C3H8(g) | 24.806 | - | | CO2(l) | - | 1.263 | | CO2(g) | 93.995 | - | | H2O(l) | - | 10.499 | | H2O(g) | 57.763 | - |

[Terjawab] 9. The solubility of ______ decreases as the temperature is raised. (A) CaO (B) CaCO₃ (C) Ca(OH)₂ (D) NaCl 10. How does stirring affect the solubility of a solid? (A) Increase the pressure (B) Increase the temperature (C) Increases the rate of dissolution of the solute in the solvent (D) Increase the reactivity of the solute and solvent

[Terjawab] $H _2 SO _4( aq )$ and $KOH ( aq )$ $\\\xrightarrow[\\text { Molecular Equation }]{H_2 SO_4(aq)+KOH(aq) \\rightarrow}$ Complete Ionic Equation Net Ionic Equation Spectator Ions

[Terjawab] Which refers to the amount of a solute that will dissolve in a given volume of solvent at a given temperature and pressure? A. solubility B. supersaturated C. dissolution rate D. concentrated

[Terjawab] Which element is a transition metal? oxygen, O uranium, U neon, Ne cobalt, Co

[Terjawab] Which is a substance that is made up of only one type of atom? A. compound B. element C. solution D. mixture

[Terjawab] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Terjawab] Naiñe. Formula. 2. Write a balanced equation for the reaction between the following solutions below: a. [tex]HCl ( aq )+ MgO ( s ) \longrightarrow[/tex]: + b. [tex]HNO _3( aq )+ Ca ( OH )_2( aq ) \longrightarrow[/tex] + c. [tex]H _2 SO _4( aq )+ KOH ( aq ) \longrightarrow[/tex] + 3. From the following neutralization reaction, write a. a balanced equation b. an ionic equation and c. a net ionic equation for the reaction not involving the spectator ions. 4. [tex]HNO _3+ NH _4 OH \longrightarrow[/tex]

[Terjawab] Constants for water \begin{tabular}{|l|l|} \hline$\Delta H_{\text {vap }}$ & $40.65 kJ / mol$ \\ \hline$\Delta H_{\text {f }}$ & $-285.83 kJ / mol$ \\ \hline$\Delta H_{\text {fuslon }}$ & $6.03 kJ / mol$ \\ \hline specific heat & $4.186 J / g ^{\circ} C$ \\ \hline molar mass & 18.02 g \\ \hline \end{tabular} How much energy is released when 6.0 g of water is condensed from water vapor? A. $6.0 g \times 1 mol / 18.02 g \times 6.03 kJ / mol$ B. $6.0 g \times 1 mol / 18.02 g \times 40.65 kJ / mol$ C. $6.0 g \times 1 mol / 18.02 g \times 4.186 kJ / mol$ D. $6.0 g \times 1 mol / 18.02 g \times(-285.83 kJ / mol )$

[Terjawab] T1.15 Which ONE of the following statements is TRUE for an oxidising agent? A) It gains electrons. B) It causes another species in the reaction to be reduced. C) Its oxidation number does not change during a chemical reaction. D) Its oxidation number increases during a chemical reaction. edu1.6 Which ONE of the following metals will reduce Cd2+(aq) to Cd(s), but will NOT reduce Mn2+(aq) to Mn(s)? A) Zn B) Ag C) Ni D) Mg