A rock formed with 1,000 atoms of a radioactive parent element, but only contains 12.5% of its original radioactive parent atoms today. if the half-life is 1,000,000 years, how old is the rock? (ess 4.6)

How many molecules of H2O are there in 1.0 g of H2O?

Describe the possible components of a buffer solution. (Select all that apply.) A. strong acid and its conjugate base B. strong base and its conjugate acid C. weak base only D. weak base and its conjugate acid F. weak acid only G.

What is collids and suspension

This chart shows characteristics of three different types of atoms. Which statement is best supported by the information in the chart? Atom X will donate electrons to Atom Y. Atom X will accept electrons from Atom Y.

What makes the color blue

Salt mixed in water is an example of a___ a. solution b. heterogeneous mixture c. colloid d. suspension e. pure substance

How are intermolecular forces different from the forces that bond atoms together into molecules? How are they similar?

Assuming a constant temperature which sample below would you expect to be at the highest pressure?

What is 16.7 cubic feet expressed in cubic centimeters

3. Using Equation 18-5 and the pKIn value you found, determine the ratio [In-]/[HIn] at the pH in the middle of the range you studied (i. e., pH = 6.0 for bromocresol purple, pH = 7.0 for bromothymol blue, and pH = 7.7 for phenol red).