Physical change: a change in which no new substances are formed. the form of the substance is changed but not it's chemical composition (ice melting, bread toasting)
chemical change: any change that results in the formation of new chemical substances. this type of change modifies molecules and atoms by making and breaking the bonds between atoms! (iron rusting, gas burning)
so basically a physical change just changes the appearance of a substance, but a chemical change changes the makeup on a molecular level. i hope this helps you out!
The purpose is that it shows you all the elements we know and it arranges them in groups that are also the same kind like Chemistry.
The answer is B. Acid turns blue litmus paper to red
Photosynthesis produces glucose and oxygen.... Respiration on the other hand would produce the other options.
Answer:
30 moles of solute
Explanation:
15 M = moles/2 liters
moles = Molarity * Liters
moles = 15 M * 2 Liters
moles = 30
