Write the formulas of the following compounds:

(a) rubidium bromide

(b) magnesium-selenide

(c) sodium oxide

(d) calcium chloride

(e) hydrogen fluoride

(f) gallium phosphide

(g) aluminum bromide

(h) ammonium sulfate

In an endothermic reaction would energy be considered a reactant or a product?

Volume of a cone is 200.96 what is the height of the cone

Choose the Brønsted-Lowry acids and bases in the following equation: HCN + OH=H2O + CNC A) acids HCN, CNº bases OH, H20 B) acids CN, OH bases HCN, H2O C) acids HCN, H20 bases OH", CN D) acids OH", H20 bases CN", HCN E) acids HCN, OH bases H20, CN

The number of valence electrons for 1s22s22p4 is:

French priest who explored the Mississippi River

Molecules move most slowly in: solids liquids gases compounds

When limestone (solid) is heated, it decomposes into lime (solid) and carbon dioxide gas. This is an extremely useful industrial process of great antiquity, because powdered lime mixed with water is the basis for mortar and concrete - the lime

Identify each enthalpy change by name and classify each change as exothermic or endothermic. 1. 1 mol NaCl (s) à 1 mol NaCl (l) 2. C4H10 O (l) à C4H10O (g) 3. H2O (g) à H2O (l) 4. 1 mol NaCl (s) + 3.

Calculate the number of atoms in a 1.26*103 g sample of silicon.

A region that has a large number of atoms whose magnetic fields are lined up parallel to a magnet's field is A. the magnetosphere. B. the magnetic declination. C. a magnetic domain. D. a ferromagnetic region.