Can something be both a mixture and a pure substance? Explain using examples.

2 elements don't take part in covalent bonding

Elements have a series of ionization energies for removing the first and additional electrons from the atom. Each ionization energy increases for successive electrons being removed.

A thermometer is in a beaker of water. Which statement best explains why the thermometer reading initially increases when LiBr (s) is dissolved in the water? (1) The entropy of the LiBr (aq) is greater than the entropy of the water.

What volume of 0.160 m li2s solution is required to completely react with 130 ml of 0.160 m co no3 2?

Is it true dalton inferred that all atoms of an element are identical?

What does LeChatelier's principal mean

How many milliliters of a 0.7% stock solution are required to make 2 l of 0.2% solution? how many ml of solvent will be required to carry out the dilution?

What percentage of the naphthalene molecules emitted a photon?

In an endothermic reaction, heat is absorbed from the surroundings. How does this affect entropy? A. The particles in the surroundings move slower and have decreased entropy. B.

The temperature of a sample of liquid water changes from 50°C to 30°C. Which statement best explains the change that must happen at the molecular level? A. The molecules move more quickly and their average kinetic energy increases. B.