Convert to moles: show work

1. 6.6g (NH4) 2SO4

2. 4.5kg Ca (OH) 2

3. 25g CaO

4. 25g Fe (NO3) 3. 6H2O

5. 25g K2CrO4

What did J. J. Thomson discover about the atom that changed the atomic model previously used?

How many electrons can the innermost shell of an atom have? a. 0 b. 2 c. 4 d. 6 e. 8?

What layer of the atmosphere contains almost 80% of the atmosphere total mass

Write balanced formula for, sodium chloride is mixed with silver nitrate

What is the most common reason for matter changing its state?

Select all that apply to diffusion. A solid cannot diffuse in to another solid. Solids can diffuse in liquids. Liquids can diffuse in liquids. It is the process of intermingling atoms from one substance into another.

We are all familiar with the general principles of operation of an internal combustion engine: the combustion of fuel drives out the piston.

A first order reaction has a rate constant of 0.816 at 25 oC. Given that the activation energy is 22.7 kJ/mol, calculate the rate constant at 34 oC. (enter answer to 3 decimal places)

Part b select the ester that is formed when propanoic acid reacts with isopropyl alcohol in the presence of heat and an acid catalyst.

Do metals form anions or cations