How many moles of butane (C4H10) must be burned in an excess of O2 to produce 25 moles of CO2?2C4H10(g) + 13 O2(g) → 8 CO2(g) + 10 H2O(g) *

6,25 moles

Explanation: mark amount of butane x.

From equation you can calculate x in a following way:

2/x = 8/25. 8x = 50. And x = 6,25

2b2t

explanation:

2b2t

c-14 is carbon-14, or radiocarbon.   it is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons.