Answer:
1.51 x 10²⁴ things
Explanation:
According to Avogadro's Constant.
1 mole of any substance, constains 6.02×10²³ particles of that subtance.
From the question,
If we have 2.50 moles of anything,
1 mole of anything ⇒ 6.02×10²³ things
2.50 moles of anything ⇒ y things
solving for y
y = (2.50× 6.02×10²³)/1
y = 15.05×10²³
y = 1.505×10²⁴
y ≈ 1.51×10²⁴
The Plum Pudding model of the atom was like a modernchocolate chip cookie it had subatomic particles embedded inside it in no particular arrangement
the gold foil experiment proved that there was a lot of empty space in an atom Because of the launched Particles.mostly deflected but some went through the foil
A. actinides do not occur in nature.
Answer: The correct option is (c). The total pressure doubles.
Solution:
Initially, only 4 moles of oxygen gas were present in the flask.
(
) ( according to Dalton's law of partial pressure)
....(1)
= Total pressure when only oxygen gas was present.
Final total pressure when 4 moles of helium gas were added:
partial pressure of oxygen in the mixture :
Since, the number of moles of oxygen remains the same, the partial pressure of oxygen will also remain the same in the mixture.
= Total pressure of the mixture.
from (1)
On rearranging, we get:
The new total pressure will be twice of initial total pressure.
Answer:
2cm^3
Explanation:
Use the density triangle: D=MxV
Switch for variables, V=M/D
Plug in numbers, 15.8g/7.9g/cm^3=2cm^3
