Answer:
D. 4
Explanation:
Answer and Explanation: Carbon can form a maximum of four covalent bonds. Carbon can share up to four pairs of electrons, therefore, the carbon atom fills its outer energy level and achieves chemical stability.
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C2H2
Answer: Oxygen is the limiting reagent.
As can be seen from the given balanced equation:
3 moles of reacts with 1 mole of
1.52 moles of reacts with= of
Thus is the limiting reagent as it limits the formation of products. (0.91-0.51)= 0.40 moles of will remain as such and thus is an excess reagent.
Freezing
It changed from a liquid to a solid and that process is call freezing