Which is the balanced chemical equation representing the synthesis of hydrogen gas and oxygen gas? h2 o2 h2o
a. h2 o2 h2o
b. h2 o2 2h2o
c. 2h2 o2 2h2o
d. 2h2 2o2 2h2o

The fact that the total amount of energy in a system remains constant is a(n)

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

Give a real-world example of an energy transformation that uses two of the following forms of energy: chemical, mechanical, nuclear, gravitational, radiant, electrical, thermal (heat), and/or sound.