Does aluminum conduct electricity?

A hospital buys a compound that contains an unstable isotope of barium. Several months later, most of the barium has changed to the element lanthanum. Which of the following is responsible for this change? A. Exposure to air B.

The particles that are found in the nucleus of an atom are a. neutrons and electrons c. protons and neutrons b. electrons only d. protons and electrons

If the molar enthalpy for the formation of a compound is - 192 kJ, why is the molar enthalpy of the decomposition of that compound 192 kJ?

What is the pH of blood, given the hydrogen ion concentration is 4.0 * 10-8M?

One difference between mixtures and pure subtances is that

Should a bartender use ice and scoop directly from ice machine or use an ice holding device and scoop to make drinks and refill drinks from

What classification should this reaction have? 4Al + 3O2 → 2Al2O3

If you start with 100 grams of a radionuclide, how much will you have after two half-lives have passed?

Identify the spectator ions in the following complete ionic equation. 2k (aq) s2 - (aq) pb2 (aq) 2no-3 (aq) →pbs (s) 2k (aq) 2no-3 (aq) express your answers as ions separated by a comma.

4. A bird left its post and flew in a triangular path. It flew 21 yards south, 72 yards east and 75 yards diagonally to end back at the post. Is it a right triangle?