How many valence electrons are available for bonding in silicon? four
five
eight
fourteen

What provides structure to the human body?

When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.

You exhale co2 which is produced during cellular respiration.  co2 combines with the water in your blood's plasma to make up one half of the body's most important buffer pair, carbonic acid.  the more physical activity you engage in, the more co2 your body is producing.  you can see this by putting some of the cabbage indicator in a glass and then blowing bubbles into it through a straw.  can you see a change in the color of the indicator?