Describe the three types of protein fibers common to the extracellular matrix of tissues.

Consider some weak acid HX (aq) → H+ (aq) + X- (aq) where Ka = 2.0 x 10-4. Calculate the pH of a 0.100 M solution.

Consider the reaction: 4 HCl(g) + O2(g) ↔2 H2O(g) + 2 Cl2(g), given the following equations and H values, determine ∆H° for the reaction using Hess’s law H2(g) + Cl2(g) ↔ 2 HCl(g) ∆H = -185 kJ 2 H2(g) + O2(g)  ↔2 H2O(g)      ∆H = -484 kJ

The rate constant for the beta decay of thorium-234 is 2.882 x 10–2 / day. What is the half-life of this nuclide?

Determine the equilibrium constant for the system N2O4   2NO2 at 25°C. Theconcentrations are shown here:  = 2.48× 10–2M,  = 1.41 × 10–2M.

What volume of CO2 gas at 645 torr and 800. K could be produced by the decomposition of 45.0 g of CaCO3? CaCO3(s) → CaO(s) + CO2(g) (R = 0.08206 L • atm/K • mol)

What is the working time of regulalr-set alginate impression material?

What can be used to  polish gold extraorally? 

Which of the following is an acceptable method for altering the setting time of alginate impression material?

14 karat gold contains ______% gold.