Which set expresses the following numbers in scientific notation?: seven hundred-millionths, seven hundred million, and seven ten-thousandths.

NaOH + HCl → NaCl + H2O What mass of water forms when 2.75 * 10-4 mol NaOH reacts completely?

Make a prediction about the effect of the following stresses on the 2NO2 = N204 equilibrium. Indicate if the spontaneity for the forward reaction will increase or decrease: a. Addition of NO2 (g) to the mixture b. Removal of N2O g

A lithium atom that has lost an electron comes near a chlorine atom that has gained an electron. What happens? A. They form a peptide bond? B. They form a covalent compound C. They form an ionic compound D. They form a hydrogen bond

A neutral atom with the electron configuration 2-8-6 would most likely form a bond with an atom having the configuration

Which two elements have the same number of valence electrons? Na and Sr Zr and H O and S Mg and P

How has earth change during our current era?

What are the phase transitions in which heat energy is gained?

A cylinder contains 4.0 g of nitrogen gas. A piston compresses the gas to half its initial volume. Afterward, by what factor has the mass density of the gas increased?

The balanced equation below represents the reaction between magnesium metal and hydrochloric acid to produce aqueous magnesium chloride and hydrogen gas. Mg (s) + 2HCl (aq) = = > MgCl2 (aq) + H2 (g) A piece of Mg (s) has a volume of 0.

What is the molarity of a solution prepared by dissolving 33.4 g of sodium chloride in some water and then diluting the solution to a volume of 300.00 mL?