In class, an instructor pours liquid nitrogen on an inflated balloon and the balloon collapsed on itself. why does the ballon deflate although no gas is lost from the balloon?

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

Use this information to determine the number of calends electrons in the atoms. which of the following correctly compares the stability of the two atoms? a) both are unreactive b) both are highly reactive c) a is unreactive and d is reactive d) a is reactive and d is unreactive

Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.