Is crushing a rock a chemical or physical change?

For a chemical system at equilibrium, what is the concentration of both the reactants and the products

What is the formula for gunpowder

Most substances can exist as a gas, a liquid or a solid. These are called different ___ of matter.

How much heat is absorbed when 447 g of water, Cp = 4.184 J/goC, goes from 25.0 oC to 35.0 oC?

Which process would require the least amount of energy? a) the process for the first ionization energy b) the process for the second ionization energy c) the process fro the third ionization energy

In a closed system, the total heat given off by warmer substances equals the total heat energy gained by cooler substances (qwater = - qliquid).

What compound will not give oxygen on heating

Choose one property of water that makes it unique. Describe the property and explain the chemical or physical?

An object is dropped onto the moon (g m = 5 ft/s 2). how long does it take to fall from an elevation of 250 ft.?

Which type of luster gives the mineral the appearance of metal?