Draw the Lewis structure for ammonia, NH3. Include lone pairs. In the Lewis structure:. 1) Nitrogen has a lone pair of electrons.
2) Nitrogen has three bonding pairs of electrons.
3) Each hydrogen has a bonding pair of electrons.
4) All of the above.

Achemist has dissolved a certain substance in water. the chemist knows that more of the substance could be dissolved into the water before it stops dissolving. therefore

37.0 °c = °f (human body normal temperature)

Sandy is building a small toy car. he wants to use a balloon to power the toy car. he fills a balloon with air and then attaches a straw to the balloon. he tapes the balloon-straw combination to the car and then releases the end of the balloon. the toy moves forward as the air from the balloon comes out the back of the straw. what can sandy do to make the toy car move faster? a) use less air in the balloon. b) blow up the balloon more. c) use a longer straw. d) use larger tires.