2 nombres del elemento helio

What ion will be formed by the selenium atom shown below when it has a stable set of valence electrons? Selenium atom A. Se6 + B. Se2 + C. Se6 - D. Se2-

When the hydrogen chloride concentration doubles, the number of collisions between the reactants (1. Decreases 2. Increases 3. Remains constant), which causes the rate of the forward reaction to (1. Decrease 2. Increase 3. Remain constant)

Do two compounds form a mixture or a pure substance when you put them together mechanically, such as by stirring?

Some distilled water is added to an empty beaker. a gram of copper (ii) nitrate is added to the beaker and while the water is being stirred. after a few minutes, what is in the beaker?

What is the volume of silver metal will weigh exactly 2500.0g. The density of silver is 10.5g/cm3 - centimeters cubed-

Can anyone tell me how to balance chemical equations

Nomadic people received income from where

How many milliliters of 0.755 m h2so4 solution is needed to react with 55.0 ml of 2.50 m koh solution? given: 2 koh (aq) + h2so4 (aq) → 2 h2o (l) + k2so4 (aq) ?

Ammonia is among the top ten synthesized compounds. Its many uses include the manufacture of ammonium nitrate and other fertilizers. Ammonia decomposes at high temperatures. In an experiment to explore this behavior, 2.

How to seperate sand and water