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

Which of the following is a groove in the land that carries runoff after a storm? Coastline Gully Oxbow lake Stream

Elements have three or fewer electrons on the outer energy level are classified as what?

What is the name of the compound? Sn (CO3) 2

Write the condensed electron configurations for the following atoms, using the appropriate noble-gas core abbreviations. Se Express your answer in condensed form in order of increasing orbital energy as a string without blank space between orbitals.

A sample of a radioactive substance decayed to 91.5% of its original amount after a year. (Round your answers to two decimal places.) (a) What is the half-life of the substance

Which was the limiting reactant: the zinc or the hydrochloric acid? Remember that the limiting reactant is completely consumed in a reaction and no new product is formed unless more of the limiting reactant is added.

How many moles are in 4,55 X 10^23 molecules of CO2 (rounded)

In standardization of NaOH solution, a student found that 25.55cm3 of base neutralized exactly 21.35cm3 of 0.12M HCl. Find the molarity of the NaOH.

Which is a base unit in SI? A. centimeter B. kilogram C. gram D. grams/milliliter

The primary mechanism for converting atmospheric carbon into usable forms for life on earth is achieved by