2.) You have just volunteered to decorate the gym for the winter dance with 300.0 Helium balloons. Their is a store in town that will rent a 25 L. helium tank with a
pressure of 30.0 atm. Each balloon, when filled, holds 2.5 L of helium gas at a pressure of
1.04 atm. Will one tank be enough to fill all 300.0 balloons? Assume that the gas
temperature does not change as the balloons are filled. If not, how many balloons can be
filled with the tank of gas?

why do the isotopes of a particular element behave differently in nuclear reactions but the same in chemical reactions? chemical reactions involve changes to electrons in an atom; isotopes do not differ in electrons, and so they react the same way during chemical changes.

just did the assignment and the answer was #1 +2 n

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).