The series of metals shown above is what we call the activity series. This is a guide for us to know what products are formed during a metal displacement reaction. A metal must be above the other metallic compound for displacement to occur.
1. Ag is way below the series compared to Na. No reaction occurs.
2. Al is above Fe, no reaction occurs.
3. Na is above Ni, no reaction will occur.
4. Fe is a more active metal than copper. A displacement reaction will occur.
Answer:
C
Explanation:
The number of particles of any kind in 1 mol is 6.02*10^23.
How you modify that depends on the units.
The number of molecules in 1 mole of hydrogen is 6.02*10^23 molecules.
Each molecule consists of 2 atoms. Pure hydrogen at STP will have a multiplier of 2.
So the number of atoms is 2*6.02 * 10^23 = 1.20 * 10^24 atoms.
Answer：
It is a neutral atom and does not carry a charge
Answer:
Δ
O
Explanation:
a) 1st picture for homogenous mixture
b) 2nd picture represents atomic view of compound AB in liquids
c) 3rd one represents when the compound undergoes evaporation
d) 4th one is an atomic view of compound AB when it goes through decomposition
same as a
