Answer:
1. 389 kJ; 2. 7.5 µg; 3. 6.25 days
Explanation:
1. Energy required
The water is converted directly from a solid to a gas (sublimation).
They don't give us the enthalpy of sublimation, but
The equation for the process is then
Mᵣ: 18.02
46.69 kJ + H₂O(s) ⟶ H₂O(g)
m/g: 150
(a) Moles of water
(b) Heat removed
46.69 kJ will remove 1 mol of ice.
2. Mass of water vapour in the freezer
For this calculation, we can use the Ideal Gas Law — pV = nRT
(a) Moles of water
Data:
V = 5 L
T = (-80 + 273.15) K = 193.15 K
Calculation:
(b) Mass of water
3. Time for removal
You must remove 150 mL of water.
It takes 1 h to remove 1 mL of water.
When an atom forms chemical bonds, its arrangement of outermost electrons becomes more stable. An atom is form by a nucleus, made by protons and neutrons, and by a different number of rings that contains electrones. The outermost ring is the one that bonds with other atoms to form chemical bonds, so it is the one that could become more stable.
Answer:
Calcium Hydroxide Ca(OH)2
Answer:
<h3>The answer is 10.67 m/s²</h3>
Explanation:
The acceleration of gravity of an object given it's mass and the force acting on it can be found by using the formula
f is the force
m is the mass
From the question we have
We have the final answer as
<h3>10.67 m/s²</h3>
Hope this helps you