Acetylene gas is 92.3% carbon and 7.7% hydrogen (by mass), and its molar mass is 26 g/mol. What is its molecular formula?
a. C4H4
b. CH
c. CH2
d. CH4
e. none of these

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Some animals that try to adapt to climate changes eventually die due to starvation, as climate change alters the web.

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false