chemical measurements Flashcards
1
Q
why is mass conserved?
A
the new substances are composed of atoms that were present in the reactants
2
Q
what are the use of multipliers in equations?
A
it’s a more efficient methods for calculating a percentage increase or decrease
3
Q
what happens to the mass during chemical reactions in non closed systems?
A
if gas escapes the totale mass with look like it has decreased
4
Q
why is there uncertainty about a measurement made?
A
-limitation of measuring instrument
-skill of experimenter making the measurements
