Answer:
Option B - Density increases
Explanation:
Density is defined as:
δ = mass / volume
When T°2 is > T°1, volume has been increased
As the volume increased, density has decreased.
↓δ = mass / volume ↑
In the situation above, temperature decreased from 4° to 0°.
The volume has been reduced, so the density has been increased.
↑ δ = mass / volume ↓
Answer:
Mass =41.36 g
Explanation:
Given data:
Mass of CH₄ = 15 g
Mass of O₂ = 114 g
Mass of CO₂ produced = ?
Solution:
Chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
Number of moles of CH₄:
Number of moles = mass/ molar mass
Number of moles = 15 g /16 g/mol
Number of moles = 0.94 mol
Number of moles of O₂:
Number of moles = mass/ molar mass
Number of moles = 114 g /32 g/mol
Number of moles = 3.6 mol
Now we will compare the moles of CO₂ with both reactant.
O₂ : CO₂
2 : 1
3.6 : 1/2×3.6= 1.8 mol
CH₄ : CO₂
1 : 1
0.94 : 0.94
Number of moles of CO₂ produced by CH₄ are less so it will limiting reactant.
Mass of CO₂:
Mass = number of moles × molar mass
Mass = 0.94 mol × 44 g/mol
Mass =41.36 g
Answer:
4
Explanation:
If I remember correctly, the atomic # will always be the same as the # of electrons
I think the correct answer from the choices listed above is option A. The chemical property of a vinegar is that the <span>pH of vinegar is around 2.4. It tells something about the concentration of hydrogen ions in the solution. The other choices given only describe the physical properties of the substance.</span>