Classify the following compounds as ionic or covalent: a. MgCl2 b. Na2S c. H2O d. H2S

Which of the folowing is true about radio waves? ☹They have short wavelenghts ☹They can penetrate dust clouds ☹They reveal hot gases ☹They have high energies

9. If we start with 12 moles of diesel (C16H34), how many moles of water and carbon dioxide will be produced in a complete combustion reaction?

Does atmospheric carbon dioxide levels fluctuate daily?

Some atoms are exceptions to the octet rule by having an expanded octet. which characteristic of needed for an atom to have an extended octet

What is one of the functions of the sweet a glands

The transfer of from one molecule to another is an oxidation-reduction reaction, or redox reaction.

Banded iron formations were caused by the production of which atmospheric gas? A) Carbon Dioxide B) Water Vapor C) Oxygen D) Nitrogen

3. Which net ionic equation describes this reaction? 3Ca (OH) 2 (aq) + 2FeCl3 (aq) → 3CaCl2 (aq) + 2Fe (OH) 3 (s) 3Ca2 + (aq) + 3OH - (aq) + Fe3 + (aq) → Fe (OH) 3 (s) + CaCl2 (aq) Fe3 + (aq) + 3OH - (aq) + 3Ca2 + (aq) → Fe (OH) 3 (s) + 3Ca2 + (aq)

How many moles of methane are produced when 25.1 moles of carbon dioxide gas react with excess hydrogen gas?

Which reaction releases the greatest amount of energy per kilogram of reactants? A) neutron + uranium-235 ➡️ barium-141 + krypton-92 + 3 neutrons B) 2C + H2 ➡️ C2H2 C) C3H8 (g) + 5O2 (g) ➡️ 3CO2 (g) + 4H2O (l) D) NaOH (aq) + HCl (aq) ➡️ NaCl (aq) +