Ann is studying acid base neutralization reactions and mixes sodium hydroxide and hydrochloric acid. The reactants were clear, colorless solution and mixing them produces a clear, colorless final solution and the beaker becomes warm. She knows this reaction forms liquid water and an aqueous salt based on the neutralization rules as shown by the chemical equationWhat physical evidence indicates that there has been a chemical reaction NaOH (2q) +HCl (2q) NaCl \ 2Q) +H 2 O (l) A) The solution changes color. B ) Precipitate formation occurs. The beaker changes temperature . D) Gas bubbles form during the reaction.

the role of the microscope world in creating new materials .

answers: to make sure that all of the broken pieces of tablet were added to the water, to allow for fair comparison of all three trials, with different particle sizes to avoid experimental error

c is having 4 valence electrons and is bonded to three hydrogens and one sulphur atom, therefore, the number of bond pair is equal to four. as all the valence electrons are used in forming the bonds so, there is no lone pair left on carbon.

s is having 6 valence electrons and is bonded to one other sulfur atom and one carbon atom, therefore, the number of bond pair is equal to 2. as only two valence electrons are used in forming the bonds so, four electrons are left. therefore, two lone pairs are present on s.