Answer:
1 mole is equal to 1 moles Helium, or 4.002602 grams.
Explanation:
Answer:

Explanation:
Graham’s Law applies to the diffusion of gases:
The rate of diffusion (r) of a gas is inversely proportional to the square root of its molar mass (M).

If you have two gases, the ratio of their rates of diffusion is

The time for diffusion is inversely proportional to the rate.

Data:
t₂ = 222 s
t₁ = 175 s
M₁ = 28.01
Calculation
:

Answer:
0 kgm/s
Explanation:
The momentum of Bob while resting at the river is 0 kgm/s.
This is because the momentum of any object at rest is 0.
Momentum is the quantity of motion a body contains. It is mathematically expressed as;
Momentum = m x v
m is the mass
v is the velocity
So at rest, the velocity of a body is 0m/s and therefore, the momentum is O
It's chlorine, it's one of the few elements with 7 valence electrons
Answer:
C. Al
Explanation:
2Al+ 3H2SO4(l)------> Al2(SO4)3+ 3H2