Extend

E1 Explain why the arrangement,

movement and energy of

particles change during

changes of state.

Convert 27 moles of O into atoms 4.5 x 10^ - 23 atoms 1.6 x 10^25 atoms 2.2 x 10^22 atoms 1.7 atoms

What is the chemical formula of lead (IV) oxide

A nuclear reaction only involves valence electrons. True or False?

Calculate the molarity of the two solutions. a). The first solution contains 0.550 mol of NaOH in 2.50 L of solution. b). The second solution contains 15.7 g of NaCl in 709 mL of solution.

The combination of the Adams of two or more elements is known as a/an?

Sodium potassium, chloride and phosphorous are all nutrients involved in hydration and neuromuscular function. List each nutrient and identify either its RDA or AI. Why do some have an AI while others have an RDA

Laura wonders why an object can ever accelerate if every force it exerts causes a reaction force. Which explanation best answers her question?

Phosphorus trichloride, PCl₃ is a liquid at room temperature. Explain this observation in terms of the particles, structure and bonding of PCl₃.

4. Thorium-234 has a half-life of 24.1 days. What percentage of the original thorium-234 in a sample will remain after 144.6 days?

Which statement (s) is/are true of acid-catalyzed alcohol dehydrations? A) Protonation of the alcohol is a fast step. B) Formation of a carbocation from the protonated alcohol is a slow step.