yield = 52.23 %
Explanation:
We have the following chemical reaction:
2 Al (s) + 2 KOH (aq) + 4 H₂SO₄ (aq) + 10 H₂O → 2 KAl(SO₄)₂·12 (H₂O) (s) + 3 H₂ (g)
mass of aluminium = mass of bottle with aluminium pieces - bottle mass
mass of aluminium = 10.8955 - 9.8981 = 0.9974 g
mass of alum = mass of bottle with final product - bottle mass
mass of alum = 19.0414 - 9.8981 = 9.1433 g
number of moles = mass / molecular weight
number of moles of aluminium = 0.9974 / 27 = 0.03694 moles
number of moles of alum (practical) = 9.1433 / 474 = 0.01929 moles
To calculate the theoretical quantity of alum that should be obtained from 0.03694 moles of aluminium we devise the following reasoning:
if 2 moles of aluminium produce 2 moles of alum
then 0.03694 moles of aluminium produce X moles of alum
X = (0.03694 × 2) / 2 = 0.03694 moles of alum (theoretical)
yield = (practical quantity / theoretical quantity) × 100
yield = (0.01929 / 0.03694) × 100
yield = 52.23 %
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We all struggle in some subjects, you do badly when you don't try, and sometimes we try and can't get the answer, I'll help with that. :)
The first answer is CO2(g), CO2 is a gas, and all gas have... 4) No definite shape, no definite volume.
A piece of ice, a block of wood, and a ceramic cup are solids. They have shapes that do not change and volumes that can be measured. Any matter that is a solid has a definite shape and a definite volume.
A liquid takes the shape of what holds it, besides a flat surface, which will just evidently, take the shape of a flat surface. A liquid has a definite volume, because the volume of a liquid is constant because forces of attraction keep the particles loosely together.
Gases attempt to fill a container of any shape or size. Therefore, it has no definite shape.
There are forces of attraction among the particles in all matter, therefore, it has no definite volume.
The second question might become easier with the explanation above. A liquid has a definite volume because the forces of attraction are loosely together! Therefore, it has a definite volume, but it will take the shape of it's container.
This means... Yes! 2) It retains its original volume but changes shape.
This one is easy. To convert one gram of a solid at its normal heating point to a liquid at the same temperature, is the 1) Heat of Vaporization.
Heat of Vaporization is the amount of heat energy required to convert one gram of a substance from a liquid to a gas.
The third question, the molecules for H20, in a solid phase are always in an geometric and arranged pattern.
Most solids are arranged in geometric and arranged patterns, and since H20 is not in its indefinitely shaped liquid phase, it has a definite shape and thus, retains a repeating (geometric) pattern.
(Note- Some solids like wax or rubber do not have an arranged or geometric pattern.)
The “average of a kinetic energy” is defined as the vitality of movement of particles of a framework.
Or in simpler terms, “energy motion”.
So when temperature increases, the average kinetic energy of a molecule(s) 1) increases.
Cause of imagination
저 하늘의 오렌지빛 마법이 끝이 나기 전에
'Cause of imagination 그 찰나에
Can you feel the rush? Can you feel the rush?
시간아 멈춰줘
I wanna stay, hey (Can you feel the rush? Can you feel the rush?)
두 세계의 경계선 그 틈에 너와 나를 남기고파 (Come on, let's do it)
I wanna stay, hey (Can you feel the rush? Can you feel the rush?)
개와 늑대의 그 시간엔 마법 속에 갇히고파 (Blue hour!)
Answer:
the singler dots know as neutrons so the 4 singler dots
Explanation:
