What happens to the particles of substances when a chemical change occurs.

When the Moon is between the Earth and the Sun, how is the Moon most likely seen

Which of the following is a nonrenewable resource? A. Tree B. River C. Gold D. Carbon

1.9 mol HCl and 3.9 mol NaOH react according to the equation HCl + NaOH - → NaCl + H2O. If the limiting reactant is HCl, calculate the amount of NaCl formed.

What volume of water, in mL, is needed to dissolve 1.3*103 mg of carbon dioxide gas when the partial pressure of carbon dioxide above the water is 3.7 atm at 25 °C? The Henry's constant for carbon dioxide gas in water at 25 °C is 0.034 M/atm.

CuCl2 + Al - - - > AlCl3 + Cu Balance the single replacement chemical reaction. A) CuCl2 + Al - - - > AlCl3 + Cu B) 3CuCl2 + 2Al - - - > 2AlCl3 + 3Cu C) 2CuCl2 + 3Al - - - > 3AlCl3 + 2Cu D) 3CuCl2 + 3Al - - - > 3AlCl3 + 3Cu

What is the mass of 2N at 0.2829 atm 1.35 L and 25°C

If an ice cube melts at 0ºC but water also freezes at 0ºC, what is the difference between melting and freezing in terms of ... 8. The energy involved in the phase changes and 9. The motion of the particles of the substances during the phase changes?

What is the element Ar classified as in the periodic table?

Using the clausius clapeyron equation determines the heat of vaporization from experimental measurements of vapor pressure. the vapor pressure of dichloromethane is measured as a function of temperature and the results are tabulated.

Why is it important for people to understand how to properly dispose of waste in a watershed?