8. A text book has a mass of 22 lbs, The book is 8 inches by 15 inches by 11.77 inches. What is

the density of the textbook using the values given?

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A buffer contains 0.020 mol of lactic acid (pKa = 3.86) and 0.100 mol sodium lactate per liter of aqueous solution. a. Calculate the pH of this buffer. b. Calculate the pH after 8.0 mL of 1.

When the following equation is balanced, what is the coefficient for HCl? Mg (s) + HCl (aq) → MgCl2 (aq) + H2 (g) 2 1 3 6

Which of these illustrates how ocean and land ecosystems are connected? A. Marine turtles eat mats of floating algae and are eaten by sharks. B. Krill consume phytoplankton that capture energy by photosynthesis. C.

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Tsunami waves are formed differently than traditional ocean waves. True False

Why does pumping more air into a basketball increase the pressure inside the ball?

For each of these equations, determine the change in the number of moles of gas, δngas.? A.) (NH4) 2 CO3 (s) = 2NH3 (g) + CO2 (g) + H2O (g) B.) H2 (g) + Cl2 (g) = 2HCl (g) C.) 2H2 (g) + O2 (g) = 2H2O (l) D.) 2Na (s) + Cl2 (g) = 2NaCl (s)

How does the moon move?

Which noble gas has the same electron configuration as the oxygen in a water molecule?

If an increase in tematute accompanies a reaction, what occurred?