Substance A is ionic because in molten and aqueous solution conduct electricity and dissolves in water. This is because it dissociate in ions and ion conduct electicity and dissolve in polar molecules (water). Ionic bond is very strong (high melting point).
Substance B non polar covalent, because it is not dissolve in polar molecules and has weak intermolecular forces (low melting point).
Substance C is polar covalent because polar molecules have stronger intermolecular forces than non-polar and higher melting points.
Answer:
Iron slowly reacts with oxygen and forms rust. In this case, the reactants are iron and oxygen. The product is rust, or iron oxide. The chemical equation looks like this:
Explanation:
iron + oxygen → iron oxide
Diamond is not a rock it is a mineral.
Answer:
3.98 mol
Solution:
Moles and mass is related to each other as follow,
Moles = Mass / M.mass ------ (1)
Data Given:
Mole = ?
Mass = 80 g
M.mass = 20.07 g/mol ∴ (H = 1.08 g/mol) + (F = 18.99 g/mol)
Putting values in equation 1,
Mole = 80 g ÷ 20.07 g.mol⁻¹
Mole = 3.98 mol
