?

what is the ionic equation for:

1. the dissolution of lead iodide in water?

2. the precipitation of lead iodide in water ?

I know that the ions are completely surrounded by water molecules when they dissociate but not sure about the forces that develop between the ions and water molecules

There are a few questions that i am not sure the information needed to answer them.

I'd appreciate help and assistance to the answers of the following questions:

1) The definition of the mole involves both a mass and a number. Justify this statement.

2) Identify the mass of one mole of water and calculate the total number of atoms in this mass.

3) All compounds can have an empirical formula but only molecular compounds can have a molecular formula. Justify the statement.

4) The empirical formula of a compound is CH2, while the molecular mass is 56. Calculate the molecular formula of the compound.

5) Identify a compound which has the same empirical formula and molecular formula.

6) The compound ethanol is made of molecules containing 2 carbon atoms, 6 hydrogen atoms and 1 oxygen atoms. Identify the molecular formula of ethanol.

7) Identify the empirical formula of ethanol.

Thanks in advance

"Use the example of the radioactive tracer iodine-131 to explain the role of the circulatory system in humans"

I understand what radioisotopes are and the circulatory system, but I don't know how the radioactive substance is used and linked to the role of the system. Any help ? Thank you.

Two separate experiments were conducted.

First experiment:

- one dialysis bag contains starch solution and was immersed in a beaker that has water and iodine solution. The other dialysis bag contains glucose and was immersed in water.

So, what process (osmosis or diffusion) in each beaker was taking place? And what is actually happening ?

Second experiment:

- one dialysis bag contains glucose solution and was immersed in water. The other dialysis bag contains water and was also immersed in a beaker containing water.

What is happening in each beaker? Processes occurring in each ?i.e. diffusion or osmosis

responsibilities of each of the three governments (local, state and federal) in immigration...?

im aware that the federal government is heavily involved with immigration but i dont know exactly what they each do.

im in my teenage years and my hair started to fall dramatically from the ROOTS! it has continued to fall. I eat protein and calcium stuff, drink milk,eat fish etc.. but still i only loose hair from the roots and its so much! i find it everywhere.. even if i dont touch my hair they fall by themselves. I can see and feel it getting thinner..and some areas wheres theres not much hair.

I have a very loooooong hair and really curly.. what seems to be the problem?

the advantages of growing cotton naturally without the use of chemicals

also what does the use of chemicals on cotton do to the environment?

*If you have an ipad or a tablet*

i would like to know anything from the following:

1. specific details on the brand

2. warranty

3. what happens when the product if faulty, broken, damaged etc..

4. price

5. whats good about it

Thank you!

the book is called " Mahtab's Story" and its about a family in Afghanistan that couldn't take in the Taliban taking over so they left their home to go to Australia. But they had to be at the detention centre before they could stay in Australia.

I need a SIMILAR story of it. It can be a book, news paper article ( etc..)

please :)

the book is called " Mahtab's Story" and its about a family in Afghanistan that couldn't take in the Taliban taking over so they left their home to go to Australia. But they had to be at the detention centre before they could stay in Australia.

I need something that is SIMILAR to the book, it can be a news paper article, book (etc..)

How do you put on labret piercing?

Never tried it before and concerned that it may damage my cartillage piercing since it doesnt look like you would put it in a piercing like the normal earrings

I've got my cartillage piercing with a gun a bit more than a year ago.. didnt know i wasnt supposed to get it that way but anyway..

at the back of my cartillage piercing theres a bump which is slightly red with a little tint of purple and is sore.. is this really bad? how to treat it?

I've got my cartilage pierced with a gun, i didnt know i wasnt supposed to at that time but anyway..

i was wondering if it will ever heal like i want to keep it but when i touch it it hurts a bit and the area goes red..sometimes theres crusts too.

Also how should i take care of it?

Btw ive had it for about months.

I got it done with a gun ( i didnt know that i shouldnt do it with a gun at that time..)

Is there a chance of it healing if i continue to clean it and take care of it?

whats the evolution of ipad 1( how it changed) ?

dont copy and paste please!

please help !