Which is the most stable resonance structure of HCN?

Which of the following statements is FALSE about the following molecule?  

If we pour liquid nitrogen (which is at 77 K) onto a balloon, it shrivels upas the air within it cools and occupies less volume at the same externalpressure. Which gas law explains this behavior?

The Maclaurin series for the arctangent function is:   \[ \tan^{-1}x = \displaystyle \sum_{n=0}^\infty \frac{(-1)^n}{2n+1}x^{2n+1} \]   Use this series to compute \( \displaystyle \lim_{x \to 0} \frac{\tan^{-1}(x^2)-x^2}{x^6+2x^7} \).   For Canvas, round your answer after calculating it to two decimal places if necessary. If the limit is infinite or DNE, type 9999.

 Find the sum of the series \( \displaystyle \sum_{n=0}^\infty \frac{2(-1)^n\pi^{2n+1}}{3^{2n}(2n)!}  \).   For Canvas, round your answer after calculating it to two decimal places if necessary. If the series diverges, type 9999.

The following is a Maclaurin series for \( f(x) \) .   \( f(x)=\displaystyle 1+x+\frac{1}{2}x^2+\frac{1}{6}x^3+\frac{1}{12}x^4+\frac{1}{20}x^5+\frac{1}{30}x^6+\frac{1}{42}x^7+\cdots \)   Which of the following is \( f^{(6)}(0) \)?

Let \( f(x) = \displaystyle \sum_{n=1}^\infty \frac{3^n}{n^3}(x-2)^n \). What is the fourth derivative of \( f \) at \( x=2 \)?

Dr. P. is a radiologist at a busy urban hospital. The hospital recently implemented an AI-powered triage system that analyzes incoming imaging scans and flags those with potentially severe findings. These flagged cases are automatically moved to the top of Dr. P.’s review list. While the AI system does not make final diagnoses, it helps prioritize urgent cases. Question:What is the primary role of the AI system in this case?

You want to build a functional battery, Ni2+ +2e –> Ni(s)   Eo=-0.23 V Mn2+ + 2e –> Mn(s)  Eo=-1.18 V Eo for the cell is _______________  

Processes with _____ are always spontaneous