What is the most common reason for matter changing its state?

How many liters of oxygen are needed to burn 10 liters of carbon monoxide?

The major argument of opponents of the 1919 Treaty of Versailles was that the treaty would require the United States to (1) become involved in future international conflicts (2) pay for war damages (3) adopt a policy of military alliances (4) keep

One parsec equals 3.26 light years, where a light year is the distance light travels in one year. if the speed of light is 186000 mi/s, how many parsecs does it take for light to reach Mars from Earth, which is 60 million kilometers away? (1 km = 0.

The length of a spring when it's at rest is measured to be 0.56 centimeter. How many significant figures are there in this measurement?

Which of the elements has the highest first ionization energy C Si Ge Sn Pb

What do a Am radio, Fm radio, television and cell phones have in common. A.) they were all invented in the same year B.) they were all invented by the same scientist C.

Consider the reaction: 2 NO (g) + 5 H2 (g) → 2 NH3 (g) + 2 H2O (g) A reaction mixture initially contains 5 moles of NO and 10 moles of H2. Which set of amounts best represents the mixture after the reactants have reacted as completely as possible?

True or False: If you have 2 moles of water and 2 moles of carbon, you have the same number of molecules.

Balancing chemistry equations

How much energy, in joules, is released when 17 kilograms of granite is cooled from 45 C to 21 C?