Notice that "so4" appears in two different places in this chemical equation. so 2−4 is a polyatomic ion called "sulfate." what number should be placed in front of caso4 to give the same total number of sulfate ions on each side of the equation? ? caso4+alcl3→cacl2+al2(so4)3

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