What is different about pure and mixtures

Which of the following processes would you predict to have an increase in entropy? condensation of water freezing water melting ice deposition of CO2 (changing from a gas to solid)

Make inferences about what you think would happen to other living things, such as plants and animals, in an area exposed to nuclear radiation.

When a substance changes into a different substance what change has occured

The highest principal enegy level of period 2 elements is 2. Period 3 elements all have six 3p electrons. Period 4 elements have an inner electron configuration of [Ar]. The valence electrons of group 5A elements are in the 6s subshell.

If one mole of a substance has a mass of 56.0 g, what is the mass of 11 nanomoles of the substance? Express your answer in nanograms using the correct number of significant figures. Do not enter your answer using scientific notation.

How does decreasing the temperature of a solid affect the motion of the particles in the solid?

How has earth change during our current era?

What are the phase transitions in which heat energy is gained?

A cylinder contains 4.0 g of nitrogen gas. A piston compresses the gas to half its initial volume. Afterward, by what factor has the mass density of the gas increased?

The balanced equation below represents the reaction between magnesium metal and hydrochloric acid to produce aqueous magnesium chloride and hydrogen gas. Mg (s) + 2HCl (aq) = = > MgCl2 (aq) + H2 (g) A piece of Mg (s) has a volume of 0.