Methane gas burns in the presence of oxygen according to the equation below. How much heat is released when 12.0 g of methane are burned in excess oxygen assuming the pressure is constant

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

2b2t

explanation:

2b2t

i dont know the answe

gasoline is a mixture. it contains several different kinds of compounds that can be present in a variety of ratios.