In class, an instructor pours liquid nitrogen on an inflated balloon and the balloon collapsed on itself. Why does the ballon deflate although no gas is lost from the balloon?

Are pigs as smart as dogs? or are they smarter?

For the following reaction, 22.0 mol of H2 reacts with an excess of O2. 2 H2 (g) + O2 (g) → 2 H2O (l)

When an electron is displaced in a semiconductor, the hole that's left behind is A. attracted to the negative terminal of the voltage source. B. attracted to the anode of the voltage source. C. considered an impurity in the crystal. D.

Which is the most important factor in determining the state of a substance? A. the size of the atoms in a substance B. the number of molecules in a substance C. the position of the electrons on the outer valence shells D.

When an electron moves from a lower to a higher energy level does the electron gain or lose Quantum of energy

A diatomic gas has the molar mass of 38.00g/mol. what is the possible formula?

Which of the following is the final concentration of KCl if 500 ml of 0.25 M KCl is diluted to a final volume of 5 L? 0.025 L 0.0025 L 25 L 2.5 L

What do you use to measure mass

A salt shaker filled with 17.0g sodium chloride contain how many moles?

When a radioactive decay occurs what is released? A. Only protons and neutrons B. Only electrons C. Protons/Neutrons, beta particle, gamma ray D. Only gamma rays