Which statement accurately describes the origin and expansion of the universe

Two identical 1.0 L containers are filled with equimolar amounts of helium gas and argon gas, respectively. The containers are both held at 25 degrees C and a small identically sized pinhole is poked in each.

What atom has 5 neutrons 4 protons and 2 electrons

Hexane and heptane are miscible with each other in all proportions. In making a solution of them, is the entropy of the system increased, decreased, or close to zero, compared to the separate pure liquids? a. The entropy of the system is increased.

What happens to the water molecules when heat is added?

A scientist formed a theory based on an experiment he conducted. Many years later, researchers studied his experiment to see if there were any possible sources of error. Should the researchers do this?

3.011 x 10^23 atoms F in grams

What would you use if you needed to determine the density of an object? balance and graduated cylinder balance and scale scale and spectroscope

What are two forms of friction that oppose the motion of a moving car

How are models related to theories and hypotheses

What similarities do nuclear energy and chemical energy share?