Which of the following aqueous solutions are good buffer systems? . 0.21 M hydrofluoric acid + 0.15 M sodium fluoride 0.34 M sodium iodide + 0.25 M sodium perchlorate 0.19 M sodium hydroxide + 0.26 M sodium bromide 0.30 M ammonia + 0.33 M ammonium nitrate 0.26 M perchloric acid + 0.16 M sodium perchlorate

What is the molarity of 60.0 grams of naoh dissolved in 750 milliliters of water? a) 1.1 m b) 2.0 m c) 12 m d) 75 m

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal. b. he is determining chemical properties that are sufficient to identify the metal. c. he is determining physical properties that are insufficient to identify the metal. d. he is determining chemical properties that are insufficient to identify the metal.

If 22.5 of nitrogen at 748 mm hg are compressed to 725 mm hg at constant temperature. what is the new volume?