Which of these best describes a physical change?

a) fireworks explode
b) rust forms on your bicycle
c) a log in the campfire turns into ashes
d) the amount of water in a pan decreases

Which term refers to a property that depends only on the amount of a substance? ©@

1) in saturated limewater, [h+ ]=3.98x10-13 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 2) in butter, [h+ ]=6.0x10-7 m. a) find [oh]-/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 3) in peaches, [oh]=3.16x10-11 m a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? / 4) during the course of the day, human saliva varies between being acidic and basic. if [oh]=3.16x10-8 m, a) find [h+ ]/ b) what is the ph? / c) is the solution acidic, basic, or neutral? /

The molar mass of nickel(ni) is 58.7 g/mol. how many moles are in an 88 gram sample of nickel?