Final answer:
The question asks to identify the number of elements in the formulas NH and CO. NH is not a standard chemical formula and likely a typo; it should probably be NH3, which has two elements (nitrogen and hydrogen). CO contains two elements (carbon and oxygen). Therefore, options A) or C) could be correct depending on the interpretation of NH.
Step-by-step explanation:
The question is asking to identify the number of elements in the chemical formulas NH and CO. In the chemical formula NH (which seems to be a typo as the common molecule is NH3), there would typically be two elements - nitrogen (N) and hydrogen (H). However, for NH, without a subscript suggesting how many hydrogen atoms there are, this formula is incomplete and not typically recognized. The molecular formula for ammonia shown in your references as NH3, with one atom of nitrogen and three atoms of hydrogen, is an accurate representation of a molecule. Meanwhile, for the chemical formula CO, it consists of two elements - carbon (C) and oxygen (O) with one atom of each, therefore it has two elements. As per the options provided, the correct answer should identify NH and CO as having two elements each. However, given that NH is not typically a standard chemical formula, there might be some misunderstanding in the question. If we strictly interpret NH as presented, the option would be C) NH: 1 element, CO: 2 elements, but this is based on the assumption that the typo made the molecule incorrect. For typical chemical nomenclature and assuming an understanding for molecules in the question, it would be A) NH: 2 elements, CO: 2 elements if NH is assumed to be NH3