The elements of which group are nonreactive?

halogens

alkaline

earth metals

noble gasses

alkali metals

If 50g of calcium carbonate is heated, what mass of calcium oxide is formed

What evidence first supported the theory of seafloor spreading?

Sodium hydroxide (NaOH) and elemental sodium (Na) acetic acid (CH3CO2H) and hydrochloric acid (HCl) acetic acid (CH3CO2H) and ammonia (NH3) ammonia (NH3) and ammonium chloride (NH4Cl)

2. In the following reaction, identify the precipitate, write down the ionic, net ionic reactions. Name the spectator ions 2KCl (aq) + Pb (NO3) 2 (aq) - 2KNO3 (aq) + PbCl2 (5)

Which of the following elements is an alkali metal? potassium (K) calcium (Ca) chromium (Cr) germanium (Ge)

Which of the following statements is true? A. Particles of a solid have a very orderly, three dimensional arrangement and do not move B. Particles of a liquid change shape and volume C.

How does hess's law use intermediate reactions to calculate the enthalpy of a desired reaction?

Which atomic particle dtermines the chemical behaviour of an atom?

If you could travel to the Sun and back, about how far would you travel? A. 1 AU B. 2 AU C. 5 AU D. 10 AU

A scientist is conducting a descriptive experiment where she is monitoring sea level along coastal towns in California. What is a major benefit of this experiment? The relationship shows cause and effect. It is repeatable.