Mass = mr x moles
Mr of CuCl2 = ( 63.5) + ( 35.5 x 2) = 134.5
2.5 = 134.5 x moles
2.5 / 134.5 = moles
Moles = 0.019 (2DP)
0.25g of Al
Mr of Al = 27
0.25 = 27 x moles
0.25/ 27 = 0.0093 moles (2sf)
Hope this helps :)
Answer: (D) environmental chemistry
Explanation:
•boiling and freezing point
•surface tension
•vapor pressure
• solid state
•liquid state
•gaseous state
Answer:
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom
