The formula of Cobalt oxide is ZnO.
2Co(s) + O2(g) ----> 2CoO(s)
It is in solid state. It contains one atom of Cobalt and one atom of Oxygen.It is basic in nature because it is a metal oxide. It is black coloured powder. As we know that metal oxides are basic in nature.
CoO(s) + H2O (l) ---> Co(OH)2
It's solution turns red litmus paper into blue which proves that it is a base.
Because iron is a metallic solid and it takes longer to heat up because it is compounded more then other solids which takes longer because the atoms in the heat take longer to heat it up.
Answer:
1. False
2. False
3. True
4. False
Explanation:
1. CBr4 is more volatile than CCl4 False
The molecular weight of CBr4 is is greater than the CCl4, therefore it has less tendency to escape to the gas phase. Also, the CBr4 has greater London dispersion forces compared to CCl4 since bromine is a larger atom than chlorine.
2. CBr4 has a higher vapor pressure at the same temperature than CCl4 False
For the same reasons as above, the vapor pressure of CBr4 is smaller than the vapor pressure of CCl4
3. CBr4 has a higher boling point than CCl4 True
Again, CBr4 having a molecular weight greater than CCl4 ( 331 g/mol vs 158.2 g/mol) is heavier and less volatile with a higher boiling point than CCl4.
4. CBr4 has weaker intermolecular forces than CCl4 False
Both molecules are non-polar because the dipole moments in C-Cl and C-Br bonds cancel in the tetrahedron. The only possible molecular forces are of the London dispersion type which are temporary and greater for larger atoms.
B is the answer to your question.
C2H4 is not capable of hydrogen bonding because the H's are attached to the Carbon, and the charge is 0.
Although HCl cannot hydrogen bond, that aspect does not hinder it's ability to dissolve. Because HCl is polar and so is water, the positive side of H2O will be attracted to the negative side of HCl, thus "tearing" the molecule apart. (Like dissolves like - polar dissolves polar)
Based on the Solubility rule, KBr is soluble because it contains a group 1 metal.
