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Questions in chemistry

[Answered] [tex]K_a[/tex], the acid dissociation constant, for an acid is [tex]9 \times 10^{-4}[/tex] at room temperature. At this temperature, what is the approximate percent dissociation of the acid in a 1.0 M solution? A. 0.03% B. 0.09% C. 3% D. 5% E. 9% Can you please explain with some details?

[Answered] How many pi bonds are in the molecule 2-butyne, CH₃C≡CCH₃? a. 1 b. 2 c. 4 d. 6 e. 10

[Answered] This element is used to improve the conductivity of germanium. A. K B. Ga C. Fe D. Mg E. Al

[Answered] Chlorine: A. Purple solution B. Brown-orange liquid C. Green gas D. Silver-gray liquid E. Yellow-orange when burned in a flame

[Answered] How much water, in liters, must be added to 0.5 L of 6 M HCl to make it 2 M? A. 0.33 B. 0.5 C. 1 D. 1.5 E. 2

[Answered] What is the volume of a 3.00 M (mol/L) solution made with 122 g of LiF?

[Answered] How many mole ratios can be written for a chemical reaction involving 3 substances?

[Answered] Which instrument is used to measure the gain or loss of heat? A. Manometer B. Hydrometer C. Calorimeter D. Barometer E. Voltmeter

[Answered] Which bond is most polar? A) N-H B) C-H C) O-H D) H-H

[Answered] How many milliliters of [tex] \text{Cl}_2 [/tex] gas must you have to obtain 0.20 g at STP?