80.0 g of butane burns according to the chemical equation 2C4H10 + 13O2 → 8CO2 + 10H2O. What mass of oxygen reacts?

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.

Avariable that is not being directly tested during an experiment should be

Is a pencil falling to the floor anon contact force, a force, or a contact force