Answer:
The calcium sulphate is insoluble in dilute sulphuric acid and so you end up with calcium carbonate coated in a layer of calcium sulphate, which stops the acid from getting at the carbonate and so stops the reaction. so you would not get any completion .
The greater the difference in electronegativity (ΔEN) between two atoms, the greater the degree in ionic character in the bond.
If you have a bond between atoms A and B (A-B),
ΔEN = |EN_A - EN_B|
The rules for the type of bond are:
• If ΔEN < 0.5, the bond is nonpolar covalent
• If 0.5 ≤ΔEN < 1.7, the bond is polar covalent
• If ΔEN ≥ 1.7, the bond is ionic
<em>Examples:
</em>
<em>C-H</em>: ΔEN = |2.55 – 2.20| = 0.35; <em>nonpolar covalent
</em>
<em>C-F</em>: ΔEN = |2.55 – 3.98| = 1.43; <em>polar covalent</em>
<em>Na-F</em>: ΔEN = |0.93 – 3.98| = 3.05; <em>ionic
</em>
Answer:
32
Explanation:
0.56dm of gas has 0.8g
22.4dm of gas Z has a mass of 22.4/0.56X0.8
the relative molecular mass of gas Z is 32
