Which of the following shows an accurate combustion reaction?
. 2ch4 + o2 → 2ch3oh
. cu + o2 → cuo2
.mg + h2o → mgo + h2
. so + h2o → so2 + h2

B: Cu + O2 → CuO2

Explanation:

The person who aswered this question is wrong, It is not A. I took the test and got it wrong. It has to be B, Cu + O2 → CuO2 because I used all my three attempts on every single answer besides B because I was told it was wrong on here. A, C, and D all showed up incorrect on my three attempts. The other person who answered this must have had a different worded question. There is no other answer left so it had to have been B. Hope this helps.

if the temperature drops and becomes cool

then the atmosphere can be freezing as the water vapor in the air is at maximum (100%) and can be severely cold

also can be snowing lightly as the moisture in the air will start to solidify

and btw this is not chemistry but