Which of the following is not true regarding a properly written chemical equation?
a it must contain proper chemical formulas.
b it must be balanced.
c it should represent known data.
d it must show the formation of a precipitate or a gas.

In what way do investigations build scientific knowledge? the results of investigations lead to questions that cannot be tested. they reflect the opinions and social values of scientists, ensuring valid information. the results of investigations lead to new questions, which lead to new investigations. they are not influenced by the research of earlier scientists, so they are able to address gaps in understanding.i