What family of elements in the periodic table contains the most reactive metals?

Iron forms rust, expressed as: Fe2O3. Using information from the Periodic Table, what is the mass of one mole of Fe2O3? A. 71.85 g B. 143.70 g C. 159.70 g D. 319.40 g

Suppose 2.2 g of hydrochloric acid is mixed with 1.61 g of sodium hydroxide. Calculate the maximum mass of sodium chloride that could be produced by the chemical reaction. Be sure your answer has the correct number of significant digits.

Given example of the model used in science that is larger than the real object and an example of a model that is smaller than the real object

What happens to carbon compounds in air when heated sufficiently?

When elements with four electrons in the outermost shell react chemically, they A. Always gain 4 electrons B. Always lose 4 electrons C. May lose, gain, or share 4 electrons D. May lose or gain 4 electrons

1.4 Explain why it is important to support individuals to challenge information about services that may present a barrier to participation

Which describes energy changes during nuclear fission? A very large amount of energy is produced from a tremendous mass. EEUU A very large amount of energy is produced from a very small mass. G .

A 0.75mol calcium carbonate (CaCO3) pellet has what mass?

The pH of the acid in the stomach is 2. When a person has heartburn, the acid in their stomach is coming up the esophagus (lower throat) and burning the lining of the esophagus. Why would a person take an Alka Seltzer tablet for heartburn?

Calculate the photon energy (in joules) for the light emitted from the hydrogen atom if ninitial = 4 and nfinal = 2.