Write the molecular formula of nitrate using criss cross method

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Motivation cannot be developed with practice; a person either possesses it or they do not.

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

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer