Which one of the following ions would be negatively charged with a charge of - 2?

10 electrons, 8 protons

18 electrons, 16 neutrons

0 electrons, 2 protons

6 electrons, 8 protons

Which gas tank will empty first? acetylene (C2H2) oxygen (O2)

A river current has a velocity of 10 km/h related to the shore and a boat moves in the same direction as a current of 10 km/h related to the River how can the velocity of the boat related to the shore fee calculated

When electricity is produced from coal, the chemical energy in coal is first changed to thermal energy. True or False (i need this answer like now cuz i have to have this test done by 5:00 and its 8:30 -.-)

Specific heat of Fe=0.473 J/g degree C; specific hear of Pb = 0.0305 J/g degree Celcius. To raise the temperature of 1.

What is the balanced equation to, CH4+O2=C02+H2O?

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