The liquid air undergoes a process called fractional distillation. Fractional distillation uses the different boiling points of the main elements of air. As the liquid air is heated, the elements change from liquid to gas and separate from one another. Pump air through a filter to remove dust and other contaminants.

Water splitting is the chemical reaction in which water is broken down into oxygen and hydrogen: 2 H2O → 2 H2 + O. Efficient and economical water splitting would be a technological breakthrough that could underpin a hydrogen economy, based on green hydrogen.

Electrolysis is a promising option for hydrogen production from renewable resources. Electrolysis is the process of using electricity to split water into hydrogen and oxygen. This reaction takes place in a unit called an electrolyzer.

CO2 can be separated from other gases by cooling and condensation. Cryogenic separation is widely used commercially for streams that already have high CO2 concentrations (typically >90%) but it is not used for more dilute CO2 streams.

How to make oxygen in Little Alchemy 2?

1. algae + carbon dioxide.
2. algae + sun.
3. carbon dioxide + grass.
4. carbon dioxide + plant.
5. carbon dioxide + tree.
6. grass + sun.
7. plant + sun.
8. sun + tree.

Walkthrough for oxygen in Little Alchemy

1. fire + water = steam.
2. air + water = rain.
3. earth + rain = plant.
4. air + steam = cloud.
5. air + cloud = sky.
6. fire + sky = Sun.
7. plant + Sun = oxygen.

How to make bacteria in Little Alchemy 2?

1. life + mud.
2. life + primordial soup.
3. life + small.

How to make lightning in Little Alchemy 2?

1. cloud + electricity.
2. cloud + energy.
3. electricity + rain.
4. electricity + storm.
5. energy + rain.
6. energy + storm.
7. land + storm.

Godzilla walkthrough

1. earth + water = mud.
2. air + water = rain.
3. rain + earth = plant.
4. plant + mud = swamp.
5. fire + air = energy.
6. swamp + energy = life.
7. air + life = bird.
8. 2x bird = egg.

How to make animal in Little Alchemy 2?

1. beach + life.
2. desert + life.
3. forest + life.
4. land + life.
5. life + mountain range.
6. life + mountain.

Lightning walkthrough

1. air + water = cloud.
2. 2x cloud = lightning.

Yoda walkthrough

1. earth + water = mud.
2. air + water = rain.
3. rain + earth = plant.
4. plant + mud = swamp.
5. fire + air = energy.
6. swamp + energy = life.
7. earth + life = human.
8. earth + fire = lava.

Chocolate combinations in Little Alchemy

1. + coconut = Mounds.
2. + caramel = Caramelo.
3. + egg = Cadbury Eggs.
4. + milk = chocolate milk.

Walkthrough for planet in Little Alchemy

1. fire + water = steam.
2. earth + fire = lava.
3. air + steam = cloud.
4. air + lava = stone.
5. air + cloud = sky.
6. sky + stone = Moon.
7. Moon + sky = night.
8. night + sky = star.

Planet walkthrough

1. fire + water = steam.
2. steam + air = cloud.
3. cloud + air = sky.
4. earth + fire = lava.
5. lava + air = stone.
6. sky + stone = Moon.
7. sky + Moon = night.
8. sky + night = star.

How to make space in Little Alchemy?

1. Moon + star.
2. sky + star.
3. star + Sun.

How to make carbon dioxide in Little Alchemy?

1. human + oxygen.
2. night + plant.
3. night + tree.

Carbon dioxide combinations in Little Alchemy

• + plant = oxygen.
• + cold = dry ice.
• + ice = dry ice.
• + water = soda.
• + juice = soda.
• + fire = fire extinguisher.
• + pressure = fire extinguisher.
• + metal = fire extinguisher.

Carbon dioxide is produced whenever an acid reacts with a carbonate. This makes carbon dioxide easy to make in the laboratory. Calcium carbonate and hydrochloric acid are usually used because they are cheap and easy to obtain. Carbon dioxide can be collected over water, as shown in the diagram.

Walkthrough for gold in Little Alchemy

1. earth + fire = lava.
2. fire + water = steam.
3. air + lava = stone.
4. air + steam = cloud.
5. fire + stone = metal.
6. air + cloud = sky.
7. fire + sky = Sun.
8. metal + Sun = gold.

Walkthrough for gun in Little Alchemy

1. earth + fire = lava.
2. air + earth = dust.
3. dust + fire = gunpowder.
4. air + lava = stone.
5. fire + stone = metal.
6. gunpowder + metal = bullet.
7. bullet + metal = gun.

Walkthrough for pyramid in Little Alchemy

1. earth + fire = lava.
2. air + lava = stone.
3. air + stone = sand.
4. sand + sand = desert.
5. desert + stone = pyramid.

How to make snow in Little Alchemy?

1. cold + rain.
2. cold + steam.