Explanation:
the correct match can as follows:
1. helium ⇒ discrete atoms (helium is an inert gas)
2. oxygen ⇒ molecules (oxygen exists in molecular form as O2)
3 Magnesium ⇒ matalic lattice ( Magnesium is a metal FCC crystal Structure :) )
4 Aluminum⇒ covalent network (since it is situated in the middle of the group and posses amphoteric properties too)
Answer:
The correct answer is B) both are made up of monomers that are linked by covalent bonds
Explanation:
The polymers consist of a set of monomers by covalent bonds. There are those that are natural (DNA formed by nucleotide units, proteins by amino acids, starch by glucose) and synthetics made by human hands (polyethylene formed by ethylene monomers).
Answer:
m(O₂) = 3.666 g
Explanation:
The rusting of iron is due to its reaction with oxygen. The balanced equation is:
4 Fe + 3 O₂ → 2 Fe₂O₃
According to Lavoisier's law of conservation of mass, the sum of the masses of the reactants is equal to the sum of the masses of the products.
m(reactants) = m(products)
m(Fe) + m(O₂) = m(Fe₂O₃)
8.531 g + m(O₂) = 12.197 g
m(O₂) = 3.666 g
