How do i find the balanced net equation for each reaction? this is my homework, but when i began doing it i realized that i forgot a lot of what i learned in class. smh

First figure out what the products are for each equation, one of them is already give to you, so you just have to unlasso (figure out the charges) the ions. Once you figure out the products, make sure the same number of atoms is on the reactants side as the products side.

a) H2C2O4+2KOH⇒2H2O+K2C2O4

In this example C2O4 2- is one of the ions and K+ is the other ion, this yields K2C2O4. There have to be 2 K atoms on the products side, because there are 2 K atoms on the reactants side, so add a K to KOH. Then you have 2 extra Os and Hs on the reactants side, so you have to add a 2 in front of H2O.

b) CdBr2+Na2S⇒CdS+2NaBr

c) 3NaOH+Fe(NO3)3⇒Fe(OH)3+3NaNO3

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).