In the chemistry laboratory why do scientists use a mortal and pestle

When aluminum oxidizes in air it forms aluminum oxide (al2o3) if a 51 sheet?

Identify the main source of energy used by most organisms

Which pair of molecules is not a polar bond? A) N-O B) C-O C) O-H D) O-o

Perform the following mathematical operation, and report the answer to the appropriate number of significant figures. 0.00325136 - 1.76527 =

The alkali metals all have A - 4 electrons in their outer energy level B - 3 electrons in their outer energy level C - 2 electrons in their outer energy level D - 1 electron in their outer energy level

What kind of group 1 atoms are the most reactive? a. Small atoms c. Atoms with the most electrons in the valence level b. Large atoms d. Atoms at the top of the periodic table

What does it mean when there are 2.3 x 10-4 moles?

Electric force is an A. attraction and repulsion between protons and electrons . B. attraction and repulsion between protons and neutrons. C. attraction and repulsion between neutrons and electrons.

A salt crystal has a mass of 0.18 mg. how many nacl formula units does it contain?

Which of the following is easist to accelerate? A. bowling ball B. tennis ball C. golf ball D. ping pong ball