A chemist prepares a solution of aluminum chloride AlCl3 by measuring out 130.g of aluminum chloride into a 300.mL volumetric flask and filling the flask to the mark with water. Calculate the concentration in /molL of the chemist's aluminum chloride solution. Be sure your answer has the correct number of significant digits.

1. 1 mole of anything contains 6.022x10^23 pieces  

d  

2. a  

3. c, number  

5. 1.24x10^24atoms / 6.022x10^23atoms/mole = 2moles h2 atoms  

6. fe2br3 mass = 2moles x mass fe + 3 moles x mass br  

molar mass = grams / number of moles = g/mole  

to find moles = g / molar mass  

to find mass = g = molar mass / moles

he would use the colour black

bcde is the incorrect answer it is a