Big question for physicists out there:How can we be sure dark matter actually exists in our universe?

A student places a 12-gram cube of ice inside a container. After six hours, the student returns to observe the contents of the container. Which mtence suggests that the container is an open system? O A.

Using John daltons method, what's the ratio of the chemical compound of Salt - NaC1

Why do particles move faster in a gas than a solid?

What will happen to the gas pressure as the temperature increases, if the amount and volume of the gas are kept constant?

Which group period does neon belong to?

Compared to the radius of a chlorine atom, the radius of a chloride ion is (1) larger because chlorine loses an electron (2) larger because chlorine gains an electron (3) smaller because chlorine loses an electron (4) smaller because chlorine gains

What do you think made the blizzard so dangerous?

If 6 moles of a compound produce 84 J of energy, what is the a Hreaction in J/mol?

If you were traveling through space and landed on a different planet, how might your mass and weight compare to their values on Earth? Why?

Which principle explains why it is necessary to have safety belts in cars?