10 points ❗️❗️❗️

consider the combustion reaction of acetylene
(c2h2):
2c2h2 +502 + 4co2 + 2h20
use the periodic table to determine how many
grams of oxygen would be required to react
completely with 859.0 g c2h2?
423.0 g 02
832.0 g 02
1,750.0 g 02
2,640.0 g 02

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

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

Why does earth rotate? because earth is formed from cold gases collapsing due to gravity because the matter in the nebula that formed earth was spinning because earth forms more than 99% of the mass of the solar system because the hydrogen atoms inside the nebula fused to form helium