At 1.0 atm, terell heats a sample of soild caffeine at 178c the soild converts directly into gas. what is the name of this phase change?

What is the only element in group 1 on the periodic table that forms covalent bonds?

What's a physical property that describes how something feels

When calcium and magnesium metal are first purchased they are extremely shiny with metallic luster. The metal samples you received today however were not very shiny.

Rank the nonmetals in each set from most reactive (1) to least reactive (3). Neon: Selenium: Fluorine

The density of an unknown crystal is 2.65 g/mol. What will the volume read if a 4.46 g sample is added to a graduated cylinder containing 25.0 ml of water?

The partial negative charge in a molecule of water occurs because the electrons shared between the oxygen and hydrogen stoms spend more time around the oxygen atom nucleus than around the hydrogen atom nucleus?

An electron moved from a higher energy level to a lower energy level. What most likely happened during the transition?

As the average kinetic energy of the particles in a gas increases, which of the following occurs? The temperature of the gas increases. The temperature of the gas decreases. The number of particles increases. The number of particles decreases.

What is the type of strong chemical bond between carbon, hydrogen, and oxygen atoms in a single organic molecule?

0.100 mol of CaCO3 and 0.100 mol CaO are placed in an 10.0 L evacuated container and heated to 385 K. When equilibrium is reached the pressure of CO2 is 0.220 atm. 0.