As the first five elements in Group 15 are

considered in order of increasing atomic number,

first ionization energy

(1) decreases

(2) increases

(3) decreases, then increases

(4) increases, then decreases

2.15 g of an unknown gas at 71 degrees C and 1.10 atm is stored in a 1.75 L flask. Solve for the density and the molar mass of the gas.

Very important! True or false? Atoms with fewer than 4 outer electrons lend electrons?

The absorbance of a garbanzo bean solution that had been diluted by a factor of three was 0.528. what was the concentration of the iron in the original solution (before dilution) ?

What is the significance of the fact that the droplets carried different charges?

determine the molarity of a solution that has 0.267 mol of solute dissolved in 2.25 Liters of solution

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.