50 19. What is the molarity of a solution that contains 17 g of NH3 in o L of so

Question

50 19. What is the molarity of a solution that contains 17 g of NH3 in o L of solution? A) 34 M B) 2.0 M C) 0.50M D) 0 029 M E) 1.0 M 20, what volume of 0.10 NaOH can be prepared from 250. mL of 0.30 M NaOH A) 0.075 L 8) 0.25 L C) 0.75 L D) 0,083 L E) 750 L A solution with the same osmotic pressure as the blood is A) isotonic to the blood B) hypotonic to the blood. C) hypertonic to the blood. 21. D) nontonic to the blood. E) molar to the blood. The conjugate base of HCIO3 is A) HCIO2 B) Clo3 C) CI(OH)2 D) CIO3 E) HcIO. What is the [H30*] in a solution with [OH-] 1x10-12 M2 A)1 x 10-12 M B) 1 x 102 M C) 1 x 10-7 M D) 1 x 10-8 AM E) 1 x 10-2 M

Explanation / Answer

molecular weight of NH3 = 17g. Therefore, we have 1 mole in 0.5L solution. So, molarity = 1/0.5 = 2. option B) 250ml of 0.3 molar solution contains 250*0.3/1000 = 0.075 moles. Required molarity = 0.1. Therefore, no. of millitres = 1000*0.075/0.1 = 750ml. option B) option A) isotonic After removing the H+ ion, we are left with ClO3-. That is the conjugate base. option B) The solubility product of [H3O+[[OH-[ should be 10-14. Therefore, H3O+ conc. = 1*10-2. opyion E)

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