Brainliestttme : )

which of the following shows an accurate combustion reaction?

2ch4 + o2 → 2ch3oh
cu + o2 → cuo2
mg + h2o → mgo + h2
so + h2o → so2 + h2

2CH4+O2 to 2CH3OH

Explanation:

In combustion it:

is fueled by hydrocarbons

is similar to synthesis reactions

and is a combination of oxygen and fuel.

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