How is a physical change different from a chemical change?

A.)In a physical change, bonds break and new bonds form, forming new substances.

B.)In a physical change, the properties of the substances change entirely.

C.)A chemical change cannot be reversed, but a physical change can.

D.)A chemical change creates new kinds of atoms and molecules than were present before the change.

Ascientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. which term most likely describes what she is measuring?

What is the equation fort the alkaline zinc/manganese dioxide cell. a) anode b)cathode c)overall equations.

The table below shows a comparison of the different gas laws. some cells have been left blank. name variables constants equation boyle's law pressure, volume ? pv = k charles’s law volume, temperature ? v = kt ? temperature, pressure volume, moles of gas p = kt ? pressure, temperature, volume ? which are assumed to be constant while using the combined gas law? 1. pressure 2. number of moles 3. volume and moles of gas 4. pressure and temperature