One light-hour is the distance that light travels in an hour. how far is this, in kilometers? (recall that the speed of light is 300,000 km/s)

Given the equation representing a reversible reaction:NH3 (g) + H2O (l) NH4 + (aq) + OH - (aq) According to one acid-base theory, the reactant that donates an H + ion in the forward reaction is (1) NH3 (g) (2) H2O (l) (3) NH4 + (aq) (4) OH - (aq)

Hydrochloric acid and sodium hydroxide can be combined to form sodium chloride and water. Which best explains the reaction? The mass of sodium hydroxide will result in the same mass of sodium chloride.

How long must $542 be invested at a rate of 7% to earn $303.52 in interest

Which statement about crystal lattice energy is best supported by the information in the table

Rank these ions according to ionic radius. Rb+ Sr2+ As3- Se2- Br-

The atomic mass of fluorine in 19.0 amu, so the molar mass is?

A rod shaped organism with no nucleus commonly found in Garbage will most likely belong to which kingdom

Alka-Seltzer is a solid mixture of two substances, sodium bicarbonate (NaHCO3) and citric acid (H3C6H5O7). The substances react to form water, carbon dioxide (CO2), and Na3C6H5O7.

Four properties of water are listed. 1. It is colorless and odorless in its pure form. 2. It reacts with metals to form metal hydroxide and hydrogen gas. 3. When heated to 100 °C, water evaporates. 4. It decomposes to form hydrogen and oxygen.

Water is A. Acidic B. Basic C. Neutral