What does the law of conservation of mass say?

a) the mass of the products in a chemical reaction is unrelated to the mass of the
reactants.

b) the mass of the reactants is greater than the mass of the products in a chemical
reaction.

c) the mass of the products in a chemical reaction is equal to the mass of the
reactants.

d) the mass of the reactants is less than the mass of the products in a chemical
reaction.

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? /

Express the following number in scientific notation. 0.026890 =

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons