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.

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answer: e.   sour taste

explanation: acids are those substances which dissociates in water to give ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. acids are sour in taste. example: hcl

bases are those substances which dissociates in water to give ions or accepts ions. as they dissociate to give ions, they act as electrolytes and thus are electrically conductive. bases are bitter in taste. bases are slippery in nature.