The answer is B. have a good day! :)
It would be C, because Ionic bonds have to deal with valence electrons ( the outer shell ones)
<span>2 NH</span>₃<span> + 3 O</span>₂<span> + 2 CH</span>₄<span> </span>⇒<span> 2 HCN + 6 H</span>₂<span>O
2mol : 2mol
34g : 54g
25,1g : x
x = (25,1g * 54g) / 34g </span>≈ 39,9g<span>
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Group 1 was more careful in choosing the person, whereas Group 2 might have been more careless.