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Questions in chemistry

πŸ“ Answered - (a) Acetylation of one of the following compounds: phenols (Ξ²-naphthol, vanillin, salicylic acid) by any one method: Using conventional method or using green approach.

πŸ“ Answered - Type the correct answer in the box. Round your answer to the nearest hundredth. A solution has a hydronium concentration of [tex]$4.7 \times 10^{-11}$[/tex]. What is the pH of the solution? The pH of the solution is $\square$

πŸ“ Answered - Consider the following reversible reaction. [tex]2 H_2 O(g) \leftrightarrow 2 H_2(g)+O_2(g)[/tex] What is the equilibrium constant expression for the given system? A. [tex]K _{ eq }=\frac{\left[ H _2 O \right]}{\left[ H _2\right]\left[ O _2\right]}[/tex] B. [tex]K _{ eq }=\frac{\left[ H _2 O \right]^2}{\left[ H _2\right]^2\left[ O _2\right]}[/tex] C. [tex]K _{ eq }=\frac{\left[ H _2\right]^2\left[ O _2\right]}{\left[ H _2 O \right]}[/tex] D. [tex]K _{ eq }=\frac{\left[ H _2\right]^2\left[ O _2\right]}{\left[ H _2 O \right]^2}[/tex]

πŸ“ Answered - What is the correct formula of dinitrogen hexoxide? A. [tex]$NO _3$[/tex] B. [tex]$N _6 O _2$[/tex] C. [tex]$N _2 O _6$[/tex] D. [tex]$N _2 O _4$[/tex]

πŸ“ Answered - What does a positive Ξ”H look like on a potential energy diagram? A. The potential energy of the products is equal to the potential energy of the reactants. B. The potential energy of the reactants is greater than the potential energy of the products. C. The activation energy of the reactants is less than the activation energy of the products. D. The potential energy of the products is greater than the potential energy of the reactants.

πŸ“ Answered - Which is the electron configuration for boron? A. $1 s^2 2 s^3$ B. $1 s^2 2 s^2 3 s^1$ C. $1 s^1 2 s^2 2 p^2$ D. $1 s^2 2 s^2 2 p^1$

πŸ“ Answered - Select from the response list the compound or ion that best fits the description: conjugate acid of $HPO _4{ }^{2-}$. $PO _4{ }^{3-}$ $H _2 PO _4^{-}$ $H _3 PO _4$ $HPO _4{ }^{2-}$

πŸ“ Answered - What would happen if [tex]$N _2$[/tex] were added to [tex]$N _2(g)+ O _2(g)=2 NO (g)$[/tex] at equilibrium? A. More [tex]$O _2$[/tex] and NO would form. B. [tex]$K$[/tex]eq would decrease. C. More [tex]$N _2$[/tex] and [tex]$O _2$[/tex] would form. D. More NO would form.

πŸ“ Answered - Which is responsible for the formation of ozone in the upper atmosphere? A. gamma radiation B. volatile organic compounds C. ultraviolet radiation D. infrared radiation E. chlorofluorocarbons

πŸ“ Answered - Decide whether the molecules represented by the following formulas are polar or nonpolar. (You may need to draw Lewis structures and geometric sketches to do so.) 1. OFβ‚‚ 2. CHβ‚‚Clβ‚‚ 3. HCN 4. SOβ‚‚ 5. CHβ‚„