Can Hydrogen hydrogen bond with itself?

Example:
Is H-H a hydrogen bond?

Which real-world scenarios below represent physical and chemical changes? -running a car -exploding fireworks -mixing water and powdered drink mix -combining oil and vinegar to make salad dressing -taking aspirin for a headache -diluting bleach with water-digesting dinner-spreading peanut butter on bread

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Answer asap need by wednesday morning calculate the ph of 0.036m naoh best answer will be brainliest