Calcium sulfide forms when calcium loses 2 valence electrons to sulfur. What type of a bond is formed?

Select one of the options below as your answer:

A) covalent

B) ionic

What two agents are the biggest proponents of chemical weathering?

Energy in a voltaic cell transfers from to

What are some isotopes used in Cancer treatment and Magnetic Resonance Imaging (MRI) and how is the isotope used to achieve its function?

Which statement is correct about molarity and volume? They are directly related. They are inversely related. They are different units of dilution. They are different units of concentration.

Temperature is inversely related to the average kinetic energy of a gas.

Which term best describes the type of bonding in magnesium chloride

This equation indicates that the reaction gives off heat. What is this type of reaction called? 2C4H10 + ? O2? 8CO2 + 10H2O + heat a. an exothermic reaction b. an endothermic reaction c. absorption reaction d. precipitation reaction

Given the balanced equation representing a reaction: C3H8 (g) + 5O2 (g) = = >3CO2 (g) + 4H2O (g) What is the total number of moles of O2 (g) required for the complete combustion of 1.5 moles of C3H8 (g) ? (1) 0.30 mol (3) 4.5 mol (2) 1.5 mol (4) 7.

What increases in equal steps of one from left to right in the Periodic Table for the elements lithium to neon?

The organisms living together in a community are interdependent upon one another. Look at the food web below. In which of the following ways is a puffin dependent upon salmon? A. Puffins have a commensalistic relationship with salmon. B.