In the combustion of octane, 2 C3H18 +25 O2 --> 16 CO2 + 18 H20,
if 376.0 liters of carbon dioxide formed at STP, then the mass of octane, CgH18, that burned was

Matter- occupies space and possesses rest massno matter is the opposite

Polyethylene is a strong synthetic polymer that can be used to make toys and bottles. this makes plastics which are important also to people but sometimes it lead to harmful environmental effects such as global warming if these plastics are burned.

Can i get a picture of the passage

The fraction of an original sample of tritium that remains unchanged after 24.62 years is 1/4. if you need the percentage it is 25%