Which material is used for making the central rod in an electric cell?

a. Copper b. Carbon c. Aluminium d. Iron

What category can all substance be classified

The number of galaxies in the universe

Which of the following is not an appropriate unit for power? A. horsepower B. watt C. joule/sec D. newton/sec

Which is the correct rate law for the overall reaction

If a planet rotates 360 degrees during a 24 hour time period, what does that tell us about the planet? A. The middle of the planet is in darkness B. The seasons on the planet vary every day. C. The planet runs on a 12-hour time clock. D.

7. If you fill a balloon with 5.2 moles of gas and it creates a balloon with a volume of 23.5 liters, how many moles are in a balloon at the same temperature and pressure that has a volume of 14.9 liters

Which compound is formed from its elements by an exothermic reaction at 298 K and 101.3 kPa?

State one major difference between having a nitrogen atom in a ring structure and having an oxygen atom in that structure

Can dowels be chopsticks, since both of them are wood?

Which electron configuration represents the electrons in an atom of Ga in an excited state?