How much heat is released by the combustion of 2 mol of methane?
a.-80.3 kj
b.-802.5 kj
c.-1,605.1 kj
d.-6,420.3 kj

A100-watt light bulb radiates energy at a rate of 100 j/s. (the watt, a unit of power or energy over time, is defined as 1 j/s.) if all of the light emitted has a wavelength of 525 nm , how many photons are emitted per second?

What happens to the concentration of hydronium ions as the ph of a solution increases? a. hydronium ion concentration stays the same b. hydronium ion concentration decreases c. hydronium ion concentration increases

What is the volume of 2.5 moles of nitrogen gas (n2)at standard temperature and pressure (stp)?