Which equation demonstrates that mass is neither created or destroyed in a chemical reaction? H2 + O2 --> H20
® Li + S --> Li2S
© Zn + 2HCI --> ZnCl2 + H2
D CH4 + O2 --> CO2 + H2O
MM

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

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? /

What is the main reason why some developing countries fear the increase the free trade policies around the world?