The number of particles in one mole of a substance is:

Avogadro's number

molecular weight

Avogadro's weight

molecular number

earth and its ecosystem are in a constant state of change. explain how a catastrophic environmental change, such as a wildfire in california, affects the local ecosystem. how does the ecosystem respond in this case

A 0.600-kg piece of metal x is heated to 100°c and placed in an aluminum can of mass 0.200-kg which contains 0.500 kg of water initially at 17.3°c. the final equilibrium temperature of the mixture is 20.

Explain what Newton believed about Christ and God.

What holds quarks together?

Why doesn't the mass number of an isotope match the atomic mass given on the periodic table?

Which of these is a chemical property? A. Mercury is a dense liquid. B. Iodine vapor has a purple color. C. Aluminum is a very conductive metal. D. Ice melts at 0°C. E. Iron rusts in wet weather.

Which of the following is not true about the importance of the carbon cycle to living things? a. Plants use carbon dioxide to make energy. b. Carbon is the second most abundant molecule in organisms. c.

Fruit flies can either have a brown body or a black body. The allele for a brown body (B) is dominant to the allele for a black body (b). A brown fruit fly was crossed with a black fruit fly as shown below.

A light-year measures the distance a light beam can travel in one year. One light-year is equal to 9 500 000 000 000 kilometers.

The first ionization energy, e, of a potassium atom is 0.696 aj. what is the wavelength of light, in nm, that is just sufficient to ionize a potassium atom? values for constants can be found here.