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Questions in chemistry

[Terjawab] Which element would release the most energy while adding an electron to a neutral atom in the gas phase? A. Na B. Al

[Terjawab] What happens in a Lewis acid-base reaction? A. An acid donates an [tex]H^{+}[/tex], and a base donates electrons. B. An acid donates an [tex]H^{+}[/tex], and a base accepts an [tex]H^{+}[/tex]. C. An acid donates an [tex]H^{+}[/tex], and a base donates an [tex]OH^{-}[/tex]. D. An acid accepts an electron pair from a base.

[Terjawab] What kind of reaction is a neutralization reaction? A. An acid-base reaction in which the only product is a base B. An acid-base reaction that produces a salt and an acid C. An acid-base reaction that produces an acid and a base D. An acid-base reaction that leaves no excess H or OH

[Terjawab] Select the correct answer. What is the percent composition of carbon in glucose ($C_6H_{12}O_6$)? (The molar mass of $C = 12.01, H = 1.0079$ and $O = 16.00$.) A. $3.36 \%$ B. $6.71 \%$ C. $15.20 \%$ D. $40 \%$ E. $53.29 \%$

[Terjawab] Which energy change occurs during boiling? A. Some heat energy of the substance is lost. B. Heat energy of the substance remains the same. C. Most heat energy of the substance is lost. D. Heat energy is absorbed by the substance.

[Terjawab] What happens in an acid-base reaction according to the Arrhenius definition? A. An acid accepts an electron pair from a base. B. An acid donates an H, and a base donates an OH. C. An acid donates an H, and a base accepts an H. D. An acid donates an H, and a base donates electrons.

[Terjawab] Select all the correct answers. The electron configurations of some elements are given. Based on the electron configurations, which elements can likely form ions with multiple charges? zinc $[ Ar ] 3 d^{10} 4 s^2$ Iron $[ Ar ] 3 d^6 4 s^2$ sodium [ Ne ] $3 s^1$ cobalt $[A r] 3 d^7 4 s^2$ silver $[ Kr ] 4 d^{10} 5 s^1$

[Terjawab] What is assumed to be constant when using the combined gas law? A. pressure B. number of moles C. volume and moles of gas D. pressure and temperature

[Terjawab] Which chemical symbol is properly written? a) CA b) Cu c) co d) CL

[Terjawab] Which of the following is an example of an Arrhenius acid? A. [tex]$BF _3$[/tex] B. [tex]$NH _3$[/tex] C. D. NaOH