Give an example of a model used in science that is larger then the real object and an example of a model that is smaller than the real object

A balloon contains 0.76 mol n2, 0.18 mol o2, 0.031 mol he and 0.026 mol h2 at 749 mm hg. what is the partial pressure (in mm hg) of o2? give a numeric answer only, no units.

The use of logic making empirical observations and preforming dissections were all part of the scientific studies by

A polymer coating of 6:0 mm thickness is cast onto a nonporous flat surface. The coating contains a residual amount of casting solvent, which is uniform at 1.0 wt% within the coating.

Which metal is more active than tin but less active than zinc? Base your answer off the choices

metals are malleable because the free flowing blank act as a lubricant and allow the blank to blank over each other

Normal cellular pH has a hydrogen concentration of 3.98 x 10-8 M. what is the pH of a cell

What is evaporation? Describe what happens at the molecular level during evaporation.

Write is the chemical formula for calcium and chlorine

Using EDTA as the titrant and a free metal in solution is called a direct titration. This can be measured using an indicator that changes color when the metal is no longer in solution.

What is the relative formula mass for ammonium sulphate