What is the number of moles in 500L of He gas at STP

Select the correct answer. Which of these is an example of an oxygen compound? A. glucose B. amino acid C. water D. diamond

Tidal power plants work best in small estuaries or intels that border the ocean. True or false?

A welding torch produces a flame by burning acetylene fuel in the presence of oxygen. This flame is used to melt a metal.

Where are the protons in an atom located? a. Outside the nucleus b. As far away from the neutrons as possible c. We can't know since the protons are in constant motion d. In the very center of the atom, on the average e. Near the electrons

Ill upvote What is the speed of a rocket that travels 8000 meters in 12 seconds? Question 2 options: 667 m 667 m/s 96,000 m 96,000 m/s

A balance chemical reaction obeys the law of

Calculate how many kilograms are in 4 moles of Na2CO3?

210.0 °C a gas has a volume of 8.00 L. What is the volume of this gas at - 23.0°C?

What is atomic mass, atomic number, isotopes and how are all these terms related to each other?

Choose all of the statements that correctly describe the movement of particles when thermal energy is added or removed. A) The addition of thermal energy to a gas will increase the chance the particles will collide.