Chemistry Help - Please only answer if truly know the answer. See image - Thank

Question

Chemistry Help - Please only answer if truly know the answer. See image - Thank You

What is the name of a chemical substance that can be dangerous in low amounts? How are most poisons transported through the body? What is a chemical equilibrium? What is the symbol for an equilibrium reaction? What does LD50 stand for? Why do common compounds, such as sodium chloride, not have an LD50? What occurs in a dynamic equilibrium, even though there is no apparent change in the system? What does a value of 1.50 x 104 for an equilibrium constant indicate about the reaction? In the reaction HC1 H+ + Cl-, what is the value of K if [HC1] = 0.00100 M and [Cl-] = [H+] = 0.200M? What is [HA] in the reaction HA rightarrow H+ + A-, when [H+] = 0.23 M and K = 1.8?

Explanation / Answer

20. c - Toxic compound

21. d - circulatory system

22. C - one reaction being countered by reverse reaction

23. D

24. B - Lethal Dose 50%

25. D

26. C

27 C

28. A

29. C

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