21. Which of the equations is balanced?

A) 2Li2O + H2O ⇒ 2LiOH

B) 3Fe + 3O2 ⇒ 2Fe2O3

C) 2N2 + O2 ⇒ 3N2O

D) 3Mg + N2 ⇒ Mg3N2

What morbid structure traditionally has thirteen steps?

if an object is moving at a constant speed, the forces acting on it must be ___. Another way to say this is that the net force = __.

5. A 2 N and 6 N force pull a 0.5 kg object to the right, and a 4 N force pulls the object to the left. What is the net force on the object? a. 12 N to the right b. 8 N to the right C. 4 N to the right d. 2 N to the right

A hand crank generator produces electricity when the handle is turned. The generator is hooked up to a light bulb. When the handle is turned, the light bulb lights up.

A capacitor with C = 6.00 μF is fully charged by connecting it to a battery that has emf 50.0 V. The capacitor is disconnected from the battery.

Why is it useful for pairs of DNA to be held together by men bonds and not covalent bonds?

World class speed skaters can skate a 3,000-m course in about 4 minutes. What is their average speed for this course? A. 12.5 m/s B. 1.33 m/s C. 1.25 m/s D. 13.3 m/s

A building that is 105.50 ft. feet tall is casting a shadow that is 37.50 ft. feet. If the building next to it, is casting a shadow of 41.00 ft. feet, how tall is that building?

What is the technical name for super glue type adhesives

On his fishing trip Justin takes the boat 25 km south. The fish aren't biting so he goes 10 km west. He follows a school of fish 15 km north. What distance did he cover? What was his displacement?