A student observes a blood sample with a compound microscope that has a 10x ocular month and a 40 X objective lens how much larger do the blood cells appear under the microscope

Determine the value of Ka for a 0.550 M solution of Acetic Acid if the pH of the solution is 2.25

Matter is - A. destroyed by a black hole. B. transformed but never destroyed. C. created by the sun. D. destroyed but never created.

The gas used for artificial ripening of green fruit is A. ethylene B. ethane C. carbon dioxide D. acetylene

The nucleus of an atom contains which subatomic particles? A) neutrons only B) protons and neutrons C) neutrons and electrons D) protons and electrons

Which reactions are endothermic? (Select all that apply.) A. H2 (g) + ½O2 (g) H2O (aq), H = - 57.83 kcal/mole B. ½ N2 (g) + ½O2 (g) NO (g), H = + 21.6 kcal/mole C. ½N2 (g) + O2 (g) + 8.1 kcal NO2 (g) D. ½N2 (g) + 3/2 H2 (g) NH3 (g) + 11.

Oxygen and copper are examples of what? Two substances with identical atoms. Two different molecules. Two different elements. Atoms that can't combine to form compounds.

In this group, which percentage does the green seed represent? 25% 50% 75% 100%

When working on a project, a scientist discovers that some of the data she was basing her research on was not accurate. In this situation, what should the scientist do?

What happens to a neutral atom when an electron leaves

How is the kinetic energy of the particles of a substance affected during a phase change?