kaostogel - User contributions [en]

Characteristic, Makes Use Of,

2026-07-13T04:34:16Z

BrainDerry:

Hydrogen is clear to visible light, to infrared light, and to ultraviolet light to wavelengths below 1800 Å. Since its molecular weight is less than that of any various other gas, its particles have a speed higher than those of any kind of other gas at a given temperature and it diffuses faster than any various other gas. The partnership of spin positionings figures out the magnetic residential properties of the atoms Typically, transformations of one kind into the various other (i.e., conversions in between ortho and para molecules) do not happen and ortho-hydrogen and para-hydrogen can be considered as two unique adjustments of hydrogen. As part of countless carbon compounds, hydrogen exists in all pet and veggie cells and in petroleum. The Table lists the important residential or commercial properties of molecular hydrogen, [https://www.tumblr.com/josewhitlock243/820555463259242497/88tuition-login h2 chemical name and uses]. The incredibly reduced melting and steaming factors arise from weak pressures of destination between the particles. The normal oxidation number or state of hydrogen in chemical substances is +1 however very electropositive metals (alkaline and alkaline planet), reveal a − 1 oxidation state. Electrolysis of water is a conceptually simple technique of generating hydrogen. According to thermodynamic principles, this implies that undesirable forces go beyond eye-catching forces in between hydrogen particles at room temperature-- or else, the development would cool the hydrogen. It makes use of as a different resource of power in the future (fuel cells) due to the big supply of H2 in the planet's surface water particles. Taking into consideration other realities, the digital configuration of hydrogen is one electron except the next noble gas helium (He). Elementary hydrogen discovers its major commercial application in the manufacture of ammonia (a substance of hydrogen and nitrogen, NH3) and in the hydrogenation of carbon monoxide and organic compounds. The cooling effect becomes so pronounced at temperatures listed below that of fluid nitrogen (− 196 ° C) that the impact is made use of to attain the liquefaction temperature of hydrogen gas itself. Nearly all hydrogen manufacturing is done by changing nonrenewable fuel sources, particularly steam reforming of natural gas It can likewise be produced from water or saline by electrolysis, however this procedure is much more pricey.

Hydrogen (H).

2026-07-13T04:34:11Z

BrainDerry:

Hydrogen is clear to visible light, to infrared light, and to ultraviolet light to wavelengths below 1800 Å. Because its molecular weight is lower than that of any type of other gas, its molecules have a velocity greater than those of any type of other gas at an offered temperature level and it diffuses faster than any various other gas. H +3) is located in the interstellar medium, where it is produced by ionization of molecular hydrogen from cosmic rays This ion has actually likewise been observed in the top environment of Jupiter The ion is long-lived in celestial spaces as a result of the low temperature and thickness. Even though it is commonly claimed that there are much more recognized compounds of carbon than of any other aspect, the fact is that, given that hydrogen is included in nearly all carbon substances and likewise forms a plethora of substances with all other elements (other than some of the honorable gases), it is possible that hydrogen substances are much more numerous. The normal oxidation number or state of hydrogen in chemical substances is +1 yet extremely electropositive steels (alkaline and alkaline planet), reveal a − 1 oxidation state. Electrolysis of water is a conceptually straightforward technique of creating hydrogen. Its primary commercial usages include fossil fuel processing and ammonia production for plant food. Like atomic hydrogen, the assemblage can exist in a variety of power degrees. In the early world, neutral hydrogen atoms created about 370,000 years after the Big Bang as the universe expanded and plasma had actually cooled down sufficient for electrons to stay bound to protons. Hydrogen, icon H, molecular formula [https://www.tumblr.com/josewhitlock243/820555463259242497/88tuition-login h2 chemistry notes reddit] is an anemic, odor free, unsavory, combustible aeriform chemical material in the table of elements. The most essential chemical compound water (WATER) is gotten by shedding it with oxygen molecules. Under regular conditions, hydrogen gas consists of a set of atoms or a diatomic particle with a wide variety of bonding. In chemistry or chemical scientific research, the hydrogen atom is the only participant of the chemical element in which the valence electron is under the direct influence of the core. Once stars formed the majority of the atoms in the intergalactic tool re-ionized.

Dummies Guide To Hydrogen.

2026-07-13T04:33:56Z

BrainDerry:

Hydrogen is clear to visible light, to infrared light, and to ultraviolet light to wavelengths listed below 1800 Å. Because its molecular weight is lower than that of any other gas, its particles have a velocity higher than those of any various other gas at a provided temperature and it diffuses faster than any other gas. The relationship of spin positionings establishes the magnetic residential properties of the atoms Generally, changes of one type into the other (i.e., conversions in between ortho and para molecules) do not take place and ortho-hydrogen and para-hydrogen can be considered as 2 unique adjustments of hydrogen. As component of innumerable carbon substances, hydrogen exists in all animal and veggie tissue and in oil. The Table provides the important buildings of molecular hydrogen, H2. The incredibly low melting and steaming factors arise from weak pressures of attraction in between the particles. The typical oxidation number or state of hydrogen in chemical substances is +1 but extremely electropositive metals (alkaline and alkaline earth), reveal a − 1 oxidation state. Electrolysis of water is a conceptually simple technique of creating hydrogen. Its major industrial usages consist of fossil fuel processing and ammonia manufacturing for plant food. Like atomic hydrogen, the assemblage can exist in a number of power levels. In the very early universe, neutral hydrogen atoms created concerning 370,000 years after the Big Bang as the universe increased and plasma had cooled enough for electrons to continue to be bound to protons. Hydrogen, symbol H, molecular formula [https://www.tumblr.com/josewhitlock243/820555463259242497/88tuition-login h2 chemistry paper] is an anemic, odor-free, unappetizing, combustible aeriform chemical compound in the table of elements. The most crucial chemical compound water (WATER) is gotten by shedding it with oxygen molecules. Under regular problems, hydrogen gas includes a pair of atoms or a diatomic particle with a wide variety of bonding. In chemistry or chemical scientific research, the hydrogen atom is the only member of the chemical component in which the valence electron is under the direct impact of the nucleus. Once stars created the majority of the atoms in the intergalactic tool re-ionized.

Hydrogen (H).

2026-07-13T04:33:20Z

BrainDerry:

Hydrogen is transparent to noticeable light, to infrared light, and to ultraviolet light to wavelengths below 1800 Å. Due to the fact that its molecular weight is less than that of any kind of other gas, its molecules have a velocity more than those of any kind of other gas at an offered temperature and it diffuses faster than any type of other gas. The connection of spin placements figures out the magnetic residential properties of the atoms Generally, makeovers of one kind into the various other (i.e., conversions in between ortho and para particles) do not occur and ortho-hydrogen and para-hydrogen can be considered 2 unique modifications of hydrogen. As part of numerous carbon compounds, hydrogen is present in all animal and vegetable tissue and in petroleum. The Table provides the crucial homes of molecular hydrogen, H2. The very reduced melting and boiling factors result from weak pressures of tourist attraction in between the particles. Among atomic forms, it creates different unsteady ionized types like a proton (H+), a hydride ion (H −), and a molecular ion (H2+). Essentially pure para-hydrogen can be produced by bringing the mixture right into call with charcoal at the temperature level of fluid hydrogen; this transforms all the ortho-hydrogen right into para-hydrogen. According to thermodynamic principles, this implies that undesirable forces go beyond eye-catching pressures between hydrogen molecules at room temperature-- otherwise, the expansion would certainly cool down the hydrogen. It utilizes as a different resource of energy in the future (gas cells) due to the significant supply of [https://www.tumblr.com/josewhitlock243/820555463259242497/88tuition-login h2 chemistry topics] in the earth's surface area water particles. Taking into consideration various other facts, the digital configuration of hydrogen is one electron except the following honorable gas helium (He). Elementary hydrogen finds its principal commercial application in the manufacture of ammonia (a substance of hydrogen and nitrogen, NH3) and in the hydrogenation of carbon monoxide gas and natural compounds. The cooling impact comes to be so obvious at temperatures listed below that of fluid nitrogen (− 196 ° C) that the result is made use of to attain the liquefaction temperature level of hydrogen gas itself. Nearly all hydrogen production is done by changing fossil fuels, particularly steam changing of gas It can additionally be created from water or saline by electrolysis, however this procedure is a lot more pricey.

Residence, Uses,

2026-07-13T02:32:07Z

BrainDerry:

Hydrogen is transparent to visible light, to infrared light, and to ultraviolet light to wavelengths listed below 1800 Å. Because its molecular weight is lower than that of any other gas, its molecules have a rate more than those of any type of other gas at a provided temperature level and it diffuses faster than any kind of various other gas. H +3) is discovered in the interstellar medium, where it is created by ionization of molecular hydrogen from planetary rays This ion has actually also been observed in the upper ambience of Jupiter The ion is long-lived in deep space due to the low temperature level and thickness. As component of countless carbon compounds, hydrogen is present in all pet and vegetable cells and in oil. The Table details the vital residential or commercial properties of molecular hydrogen, H2. The very reduced melting and boiling points result from weak pressures of destination in between the particles. The typical oxidation number or state of hydrogen in chemical substances is +1 yet extremely electropositive steels (alkaline and alkaline planet), show a − 1 oxidation state. Electrolysis of water is a conceptually basic technique of creating hydrogen. According to thermodynamic concepts, this indicates that repulsive pressures surpass eye-catching forces in between hydrogen particles at area temperature-- otherwise, the growth would certainly cool down the hydrogen. It uses as a different resource of energy in the future (gas cells) as a result of the huge stock of H2 in the planet's surface water molecules. Hydrogen, icon H, molecular formula [https://www.tumblr.com/josewhitlock243/820555463259242497/88tuition-login h2 chemistry syllabus 2025] is an anemic, unsmelling, unappetizing, combustible gaseous chemical material in the table of elements. The most essential chemical substance water (WATER) is gotten by shedding it with oxygen particles. Under regular conditions, hydrogen gas contains a pair of atoms or a diatomic particle with a wide variety of bonding. The cooling result becomes so noticable at temperatures listed below that of fluid nitrogen (− 196 ° C) that the result is made use of to attain the liquefaction temperature of hydrogen gas itself. Nearly all hydrogen manufacturing is done by transforming fossil fuels, particularly vapor changing of gas It can likewise be produced from water or saline by electrolysis, but this process is extra costly.

Dummies Guide To Hydrogen.

2026-07-13T00:33:57Z

BrainDerry:

The existence of these weak intermolecular pressures is additionally disclosed by the truth that, when hydrogen gas increases from high to reduced pressure at space temperature, its temperature level increases, whereas the temperature level of many various other gases drops. H +3) is found in the interstellar tool, where it is created by ionization of molecular hydrogen from cosmic rays This ion has likewise been observed in the upper ambience of Jupiter The ion is long-lived in celestial spaces due to the reduced temperature level and thickness. Even though it is frequently claimed that there are extra well-known compounds of carbon than of any kind of other aspect, the fact is that, given that hydrogen is contained in nearly all carbon substances and additionally creates a plethora of compounds with all various other aspects (except some of the noble gases), it is feasible that hydrogen compounds are extra various. Amongst atomic types, it forms numerous unpredictable ionized varieties like a proton (H+), a hydride ion (H −), and a molecular ion ([https://www.tumblr.com/josewhitlock243/820555463259242497/88tuition-login h2 chemistry tuition]+). Essentially pure para-hydrogen can be generated by bringing the mix into contact with charcoal at the temperature level of fluid hydrogen; this transforms all the ortho-hydrogen into para-hydrogen. According to thermodynamic concepts, this implies that repulsive forces exceed appealing pressures in between hydrogen particles at space temperature-- or else, the growth would cool down the hydrogen. It utilizes as an alternative source of power in the near future (gas cells) as a result of the huge stock of H2 in the planet's surface water particles. Thinking about other truths, the digital setup of hydrogen is one electron short of the following noble gas helium (He). Primary hydrogen locates its major commercial application in the manufacture of ammonia (a substance of hydrogen and nitrogen, NH3) and in the hydrogenation of carbon monoxide and organic substances. In chemistry or chemical science, the hydrogen atom is the only participant of the chemical element in which the valence electron is under the direct influence of the center. As soon as stars created a lot of the atoms in the intergalactic tool re-ionized.

Feature, Utilizes,

2026-07-12T21:11:30Z

BrainDerry:

The presence of these weak intermolecular forces is additionally disclosed by the reality that, when hydrogen gas broadens from high to reduced pressure at area temperature level, its temperature increases, whereas the temperature level of a lot of various other gases falls. The connection of spin placements figures out the magnetic properties of the atoms Generally, transformations of one type right into the various other (i.e., conversions in between ortho and para particles) do not take place and ortho-hydrogen and para-hydrogen can be regarded as 2 distinctive adjustments of hydrogen. As part of innumerable carbon substances, hydrogen is present in all pet and veggie tissue and in oil. The Table provides the vital residential properties of molecular hydrogen, H2. The extremely low melting and boiling factors result from weak pressures of destination in between the molecules. Among atomic types, it creates different unstable ionized species like [https://www.tumblr.com/josewhitlock243/820555463259242497/88tuition-login a level h2 chemistry syllabus 2025] proton (H+), a hydride ion (H −), and a molecular ion (H2+). Essentially pure para-hydrogen can be created by bringing the mix right into contact with charcoal at the temperature level of liquid hydrogen; this transforms all the ortho-hydrogen right into para-hydrogen. Its main industrial uses include fossil fuel handling and ammonia manufacturing for plant food. Like atomic hydrogen, the assemblage can exist in a variety of power levels. In the very early cosmos, neutral hydrogen atoms formed concerning 370,000 years after the Big Bang as the universe increased and plasma had actually cooled sufficient for electrons to continue to be bound to protons. Hydrogen, sign H, molecular formula H2 is an anemic, odor free, tasteless, flammable gaseous chemical compound in the periodic table. One of the most crucial chemical compound water (H2O) is acquired by melting it with oxygen molecules. Under average conditions, hydrogen gas includes a pair of atoms or a diatomic molecule with a wide range of bonding. The cooling impact ends up being so obvious at temperatures listed below that of fluid nitrogen (− 196 ° C) that the impact is made use of to accomplish the liquefaction temperature of hydrogen gas itself. Nearly all hydrogen manufacturing is done by transforming nonrenewable fuel sources, particularly heavy steam reforming of natural gas It can additionally be generated from water or saline by electrolysis, but this procedure is more costly.

Hydrogen

2026-07-12T18:31:07Z

BrainDerry:

The presence of these weak intermolecular pressures is likewise disclosed by the truth that, when hydrogen gas increases from high to low stress at area temperature, its temperature climbs, whereas the temperature of many other gases drops. The relationship of spin alignments figures out the magnetic homes of the atoms Typically, makeovers of one kind right into the other (i.e., conversions between ortho and para molecules) do not take place and ortho-hydrogen and para-hydrogen can be regarded as two distinct modifications of hydrogen. Even though it is commonly claimed that there are extra well-known compounds of carbon than of any other component, the truth is that, given that hydrogen is consisted of in nearly all carbon substances and likewise creates a wide variety of substances with all other components (other than several of the honorable gases), it is feasible that hydrogen compounds are a lot more many. The typical oxidation number or state of hydrogen in chemical substances is +1 but very electropositive metals (alkaline and alkaline planet), reveal a − 1 oxidation state. Electrolysis of water is a conceptually straightforward technique of producing hydrogen. According to thermodynamic concepts, this implies that undesirable forces exceed attractive pressures between hydrogen molecules at room temperature-- otherwise, the development would certainly cool the hydrogen. It makes use of as a different resource of energy in the future (fuel cells) as a result of the significant supply of H2 in the earth's surface area water molecules. Hydrogen, symbol H, molecular formula [https://www.tumblr.com/josewhitlock243/820555463259242497/88tuition-login h2 chemistry syllabus 2025] is a colorless, unsmelling, tasteless, flammable aeriform chemical compound in the table of elements. The most vital chemical compound water (WATER) is gotten by melting it with oxygen particles. Under normal problems, hydrogen gas consists of a set of atoms or a diatomic molecule with a variety of bonding. In chemistry or chemical scientific research, the hydrogen atom is the only participant of the chemical aspect in which the valence electron is under the direct impact of the nucleus. As soon as stars created most of the atoms in the intergalactic tool re-ionized.

Dummies Overview To Hydrogen.

2026-07-12T17:47:49Z

BrainDerry:

The existence of these weak intermolecular pressures is additionally revealed by the fact that, when hydrogen gas increases from high to reduced stress at space temperature level, its temperature level climbs, whereas the temperature of most other gases falls. The partnership of spin positionings figures out the magnetic properties of the atoms Typically, transformations of one type right into the other (i.e., conversions in between ortho and para particles) do not happen and ortho-hydrogen and para-hydrogen can be regarded as two distinctive adjustments of hydrogen. As part of numerous carbon compounds, hydrogen is present in all pet and veggie cells and in oil. The Table lists the essential residential or commercial properties of molecular hydrogen, H2. The extremely low melting and steaming factors arise from weak forces of attraction between the particles. Among atomic kinds, it creates various unstable ionized types like a proton (H+), a hydride ion (H −), and a molecular ion (H2+). Essentially pure para-hydrogen can be produced by bringing the mix right into contact with charcoal at the temperature level of fluid hydrogen; this transforms all the ortho-hydrogen into para-hydrogen. According to thermodynamic principles, this suggests that undesirable forces go beyond attractive pressures between hydrogen particles at room temperature level-- otherwise, the development would cool the hydrogen. It utilizes as a different source of energy in the near future (fuel cells) as a result of the massive stock of [https://www.tumblr.com/josewhitlock243/820555463259242497/88tuition-login H2 Chemistry Practical Notes] in the planet's surface area water molecules. Taking into consideration other facts, the digital arrangement of hydrogen is one electron except the next worthy gas helium (He). Primary hydrogen discovers its primary industrial application in the manufacture of ammonia (a compound of hydrogen and nitrogen, NH3) and in the hydrogenation of carbon monoxide and organic compounds. In chemistry or chemical science, the hydrogen atom is the only member of the chemical aspect in which the valence electron is under the direct influence of the core. Once stars formed a lot of the atoms in the intergalactic tool re-ionized.

Quality, Makes Use Of,

2026-07-12T15:47:38Z

BrainDerry:

The presence of these weak intermolecular forces is also disclosed by the truth that, when hydrogen gas increases from high to reduced pressure at space temperature, its temperature rises, whereas the temperature of the majority of various other gases falls. H +3) is discovered in the interstellar tool, where it is created by ionization of molecular hydrogen from planetary rays This ion has also been observed in the top environment of Jupiter The ion is long-lived in outer space because of the reduced temperature and thickness. As component of many carbon substances, hydrogen exists in all pet and veggie cells and in oil. The Table provides the important residential properties of molecular hydrogen, H2. The very reduced melting and boiling factors result from weak forces of attraction in between the molecules. Among atomic types, it creates different unpredictable ionized species like a proton (H+), a hydride ion (H −), and a molecular ion ([https://www.tumblr.com/josewhitlock243/820555463259242497/88tuition-login h2 chemistry topics]+). Essentially pure para-hydrogen can be generated by bringing the mix into contact with charcoal at the temperature level of liquid hydrogen; this converts all the ortho-hydrogen right into para-hydrogen. Its primary commercial uses consist of fossil fuel handling and ammonia manufacturing for plant food. Like atomic hydrogen, the assemblage can exist in a number of energy levels. In the early universe, neutral hydrogen atoms created concerning 370,000 years after the Big Bang as the universe increased and plasma had actually cooled sufficient for electrons to stay bound to protons. Taking into consideration various other truths, the electronic arrangement of hydrogen is one electron short of the next worthy gas helium (He). Elementary hydrogen discovers its primary industrial application in the manufacture of ammonia (a compound of hydrogen and nitrogen, NH3) and in the hydrogenation of carbon monoxide and organic substances. In chemistry or chemical science, the hydrogen atom is the only member of the chemical aspect in which the valence electron is under the straight impact of the core. Once stars formed the majority of the atoms in the intergalactic medium re-ionized.

Dummies Overview To Hydrogen.

2026-07-12T14:29:37Z

BrainDerry:

Hydrogen is transparent to visible light, to infrared light, and to ultraviolet light to wavelengths below 1800 Å. Due to the fact that its molecular weight is lower than that of any other gas, its particles have a speed higher than those of any other gas at a given temperature level and it diffuses faster than any type of other gas. H +3) is found in the interstellar tool, where it is created by ionization of molecular hydrogen from planetary rays This ion has additionally been observed in the top environment of Jupiter The ion is long-lived in celestial spaces as a result of the reduced temperature and thickness. As part of many carbon substances, hydrogen exists in all pet and vegetable cells and in oil. The Table details the important buildings of molecular hydrogen, H2. The extremely low melting and steaming points result from weak forces of attraction in between the molecules. Amongst atomic kinds, it forms different unstable ionized species like a proton (H+), a hydride ion (H −), and a molecular ion (H2+). Basically pure para-hydrogen can be created by bringing the blend into call with charcoal at the temperature level of liquid hydrogen; this transforms all the ortho-hydrogen right into para-hydrogen. Its major commercial uses consist of fossil fuel processing and ammonia production for fertilizer. Like atomic hydrogen, the assemblage can exist in a variety of energy levels. In the early world, neutral hydrogen atoms developed concerning 370,000 years after the Big Bang as the universe increased and plasma had cooled sufficient for electrons to remain bound to protons. Hydrogen, sign H, molecular formula [https://www.tumblr.com/josewhitlock243/820555463259242497/88tuition-login h2 chemistry summary] is a colorless, unsmelling, unappetizing, combustible aeriform chemical substance in the table of elements. One of the most vital chemical substance water (WATER) is acquired by melting it with oxygen particles. Under common conditions, hydrogen gas includes a pair of atoms or a diatomic particle with a wide variety of bonding. The cooling result ends up being so obvious at temperatures below that of fluid nitrogen (− 196 ° C) that the effect is used to attain the liquefaction temperature level of hydrogen gas itself. Nearly all hydrogen manufacturing is done by transforming fossil fuels, especially vapor reforming of gas It can likewise be created from water or saline by electrolysis, yet this procedure is much more pricey.

Hydrogen (H).

2026-07-10T20:20:33Z

BrainDerry:

Hydrogen is transparent to noticeable light, to infrared light, and to ultraviolet light to wavelengths below 1800 Å. Because its molecular weight is less than that of any other gas, its particles have a speed greater than those of any various other gas at an offered temperature and it diffuses faster than any other gas. H +3) is located in the interstellar medium, where it is created by ionization of molecular hydrogen from planetary rays This ion has also been observed in the upper environment of Jupiter The ion is long-lived in celestial spaces as a result of the reduced temperature level and thickness. Even though it is frequently said that there are much more recognized compounds of carbon than of any type of other aspect, the fact is that, since hydrogen is had in almost all carbon substances and additionally forms a wide variety of substances with all other components (other than a few of the noble gases), it is possible that hydrogen substances are much more many. Among atomic types, it creates numerous unsteady ionized varieties like a proton (H+), a hydride ion (H −), and a molecular ion (H2+). Essentially pure para-hydrogen can be produced by bringing the combination right into contact with charcoal at the temperature level of fluid hydrogen; this transforms all the ortho-hydrogen into para-hydrogen. According to thermodynamic principles, this indicates that undesirable pressures exceed appealing pressures in between hydrogen molecules at space temperature-- otherwise, the development would cool down the hydrogen. It makes use of as an alternate source of energy in the future (gas cells) due to the massive stock of H2 in the planet's surface area water particles. Hydrogen, sign H, molecular formula [https://www.tumblr.com/josewhitlock243/820555463259242497/88tuition-login h2 chem qa notes] is a colorless, unsmelling, unappetizing, flammable aeriform chemical substance in the periodic table. The most vital chemical substance water (H2O) is gotten by burning it with oxygen molecules. Under ordinary conditions, hydrogen gas consists of a pair of atoms or a diatomic particle with a variety of bonding. The cooling effect becomes so noticable at temperature levels below that of liquid nitrogen (− 196 ° C) that the impact is used to achieve the liquefaction temperature level of hydrogen gas itself. Nearly all hydrogen manufacturing is done by changing fossil fuels, particularly vapor reforming of natural gas It can also be created from water or saline by electrolysis, yet this procedure is extra expensive.

User:BrainDerry

2026-07-10T20:20:26Z

BrainDerry: Created page with "33 year-old Equipment Retain Manager Leo Breyfogle from Brossard, really loves beatboxing, [https://www.tumblr.com/josewhitlock243/820555463259242497/88tuition-login h2 chem qa notes] chemistry and wine making. At all times enjoys visiting destinations for example Old Towns of Djenné."

33 year-old Equipment Retain Manager Leo Breyfogle from Brossard, really loves beatboxing, [https://www.tumblr.com/josewhitlock243/820555463259242497/88tuition-login h2 chem qa notes] chemistry and wine making. At all times enjoys visiting destinations for example Old Towns of Djenné.