Question

what information is represented in the charts?
propane
c₃h₈(g)
1 molecule
3 atoms c
8 atoms h
1 mol
+ oxygen
5 o₂(g)
5 molecules
10 atoms o
5 mol
→ carbon dioxide
3 co₂(g)
3 molecules
3 atoms c
6 atoms o
3 mol
+ water
4 h₂o(g)
4 molecules
8 atoms h
4 atoms o
4 mol
the number of moles of each substance.
track of which elements are balanced in a chemical equation.
the unbalanced equation.
the number of atoms of each element which are not involved in the reaction.
the number of grams of each of the chemical species in the reaction.
the number and types of atoms on the each side of a chemical equation.

Explanation:

• For the first option: Each chart has a value for moles (e.g., propane has 1 mol, oxygen has 5 mol etc.), so it shows the number of moles of each substance.
• For the second option: By looking at the atoms of each element (e.g., C: 3 atoms in propane and 3 in carbon - dioxide; H: 8 in propane and 8 in water (4 molecules of water with 2 H each: \(4\times2 = 8\)); O: \(5\times2=10\) in oxygen, \(3\times2 + 4\times1=6 + 4=10\) in products), we can track which elements are balanced.
• For the sixth option: The charts list the number of atoms of each element (e.g., propane: 3 C, 8 H; oxygen: 10 O (5 molecules of \(O_2\) with 2 O each: \(5\times2\)); carbon - dioxide: 3 C, 6 O; water: 8 H (4 molecules of \(H_2O\) with 2 H each), 4 O). So it shows the number and types of atoms on each side of the chemical equation.

The third option is incorrect because the equation \(C_3H_8(g)+5O_2(g)\to3CO_2(g) + 4H_2O(g)\) is balanced. The fourth option is wrong as the atoms shown are involved in the reaction. The fifth option is incorrect because there are no gram - values shown in the charts.

Answer:

• The number of moles of each substance.
• Track of which elements are balanced in a chemical equation.
• The number and types of atoms on the each side of a chemical equation.