Chief cells secrete _______________________________.

Predict what happens to air movement when atmospheric pressure is 760 mm Hg, intrapulmonary pressure is 758 mm Hg, and intrapleural pressure is 754 mm Hg

The portion of the tooth that is visible above the gum line is known as the ___________________________.

The Ka for ethylbenzoic acid is 5.6*10-5. What is the pH of a buffer that is 0.72 M ethylbenzoic acid and 0.86 M potassium ethylbenzoate (ethylbenzoate is the conjugate base of ethylbenzoic acid)? Do not type units. Do not use scientific notation.

Question 3 of 3 questions about the titration of 10.00 mL of 0.2400 M lutidine (C7H13N, pKa = 6.72) with 0.1000 M HCl. What best describes the pH at the end point of the titration?

Cumulative How many moles are in 47.3 g C4H9NO? Exact sig figs required. Use the periodic table provided: periodic table for tests.pdf Answer in mol. Do not type units, Do not use scientific notation.

How much energy is required to dissociate all the bonds in methylamine (H3CNH2)? Remember the formula is written to give you a hint on how the molecule is connected.   Table of Bond Dissociation Energies Bond Bond Dissociation Energy (kJ/mol) C-H 415 C-N 331 N-H 390. Answer in kJ/mol. Do not type units. Do not use scientific notation.

Use the dropdown menu to name each substance: NH4NO2 is [NH4NO2]. NaOCl is [NaOCl]. CoCl3 is [CoCl3].

48 g methane (CH4) is dissolved in liquid hexane to make 6.0 dm3 solution. (1dm3 = 1L) What is the molarity of CH4?  Answer in M. Do not use scientific notation. Do not type units. 

0.82 g of an unknown gas is placed in a 0.461 dm3 container at 319 K. The pressure is measured to be 2.81 atm. What is the molecular mass of the gas?  Answer in g/mol. Do not type units. Do not use scientific notation.