Answer: [H3O+] = 1.58x10-6 M
Explanation:
The pressure that will be exerted if four sample of gas are placed in a single 3.5 container is calculated as below
if each gas occupies 675 mmhg
what about 4 gases in the sample
by cross multiplication
= 675 mm hg x 4/1 = 2.7 x10^3mmhg (answer D)
Answer:
1.67 moles of N2 produce 2.5moles of NaN3
Explanation:
Equation of reaction:
2Na + 3N₂ → 2NaN₃
From the equation of reaction, 3 moles of N₂ produces 2 moles of NaN₃
How much is gotten from 2.5moles of 2NaN₃?
2 moles of N₂ = 3 moles of NaN₃
X moles of N₂ = 2.5 moles of NaN₃
X = (2.5 × 2) / 3
X = 1.67moles of N₂
1.67 moles of N₂ produces 2.5moles of NaN₃
You can find the volume of an irregular object by immersing it in water in a beaker or other container with volume markings, and by seeing how much the level goes up.
Answer : The correct option is, (A) Aluminum foil
Explanation :
Penetration power : It is the movement of particles or the ray through an object. As we know that the more the energy of a particle, the more will be the penetrating power.
The ascending order of the penetration power of alpha rays, beta rays, and gamma rays are:
Alpha rays < Beta rays < Gamma rays
The penetrating power of the alpha, beta and gamma rays varies greatly. That means,
- The alpha particles are restricted by paper.
- The beta particles can pass through the paper but it can not pass through the aluminum foil.
- The restriction of gamma rays is very difficult. It can be restrict or blocked only by concrete, lead, or other heavy shielding.
Hence, Aluminium foil will stop beta particles.