The weight of chemical B is 11.99 grams.
Let's denote the weight of chemical B as x grams. According to the given information, the weight of chemical A is 6.29 grams more than that of chemical B. Therefore, the weight of chemical A can be expressed as x + 6.29 grams.
The problem states that the weight of chemical A is 17.3 grams. So, we can set up the equation:
x + 6.29 = 17.3
Now, let's solve for x:
![\[ x = 17.3 - 6.29 \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/m08x2afa9zyr3f71js88v3sg71wkfw9to7.png)
![\[ x = 11.01 \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/12sp0ysmri2bkdk6iv5gmibnp4crome4ij.png)
Therefore, the weight of chemical B is 11.99 grams.
In summary, if chemical A weighs 17.3 grams and is 6.29 grams more than chemical B, then chemical B weighs 11.01 grams. So, the correct answer is not among the provided options. It seems there might be a mistake in the answer choices or the problem statement. Please double-check the options or the information provided.