A 0.250 g sample of calcium metal is heated in a 38,500 g crucible in presence of excess of air. The resulting crucible and product weigh 38,850 g. What is the amount of oxygen interacted?
None of the above
0 0.250 g
O 0.350 g
O 0.100 g

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