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What is the [H+] of a solution whose [OH-] = 2.75 X 10-7 ?

A gas exerts a pressure of 1.37 atm at a volume of 75 mL and a temperature of 25 ºC. If the gas’ volume is decreased to 25 mL and the temperature decreases to -25 ºC, what is the new pressure of the gas in torr?

A gas is at a temperature of 0 ºC and a pressure of 1.35 atm. If the pressure is changed to 1.97 atm what is the new temperature in Kelvin?

Which of the following is NOT among the four properties to describe gas?

What is the major function of the buffer solutions?

If a gas begins at a volume of 5 mL and a pressure of 1.125 atm and the pressure is increased to 2.75 atm, what is the new volume of the gas?

A solution has a pH of 4.46. Calculate the [H+].

Identificar Professions or Relationships Identify the people being described. Follow the model.  You will be providing the profession or the family relationship. Modelo  Es el esposo de mi tía. Es mi tío. Mi hermana enseña en la universidad.Es profesora.       Mi padre programa las computadoras. [1] Es el esposo de mi hermana. [2] Mi madre trabaja en un hospital. [3] Es la esposa de mi hijo. [4] Mi abuelo dibuja muy bien. [5]    

Read the statements.  Listen to Ana Isabel’s description of herself in her pesonal ad and indicate whether each statement is True or False. La madre de Ana Isabel es doctora.

Read the statements.  Listen to Ana Isabel’s description of herself in her pesonal ad and indicate whether each statement is True or False. El hermano de Ana Isabel no estudia.