What type of reaction is CuO + NH3 = N2 + Cu + H2O?

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

If two atoms are bonded to a central atom with no lone pairs,how will they be arranged

How do you lengthen a pattern piece? (family and consumer science, sewing)