If an atom contains 13 protons, then it has <u>13 electrons.</u>
Answer:
P₂ = 1.22 kPa
Explanation:
This problem can be solved using the equation of state:

where,
P₁ = initial pressure = 1 KPa
P₂ = final pressure = ?
V₁ = initial Volume = 1 liter
V₂ = final volume = 1.1 liter
T₁ = initial temperature = 290 k
T₂ = final temperature = 390 k
Therefore,

<u>P₂ = 1.22 kPa</u>
as the surface area increases the rate of reaction also increases.
Explanation:
F=ma therefore 25kg*1.0m/s^2=25N force on the mass