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Anonymous users2024-02-07Hydrogen is a colorless and odorless gas, and the standard gas density (kpa, 0) kg m3 is grams. Mass divided by density to calculate the volume as.
Hydrogen is a colorless gas and less dense than air (among all gases, hydrogen has the least density. Under standard conditions, the mass of 1 liter of hydrogen is grams, which is much lighter than air for the same volume). Because hydrogen is poorly soluble in water, it can be collected using the drain gas collection method.
In addition, at a pressure of 101 kPa, hydrogen can be converted into a colorless liquid at a temperature; , it becomes a snow-like solid. At room temperature, hydrogen is very stable and does not easily react with other substances. But when the conditions change (e.g., ignition, heating, use of catalysts, etc.), the situation is different.
For example, hydrogen has strong activity after being adsorbed by metals such as palladium or platinum (especially adsorbed by palladium). Palladium metal has the strongest adsorption effect on hydrogen. When the volume fraction in the air is 4%-75%, it can cause ** when it encounters an ignition source.
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Anonymous users2024-02-06It needs to be under standard conditions.
Because the molecular formula of hydrogen is H2, then the molecular weight is 2
is moles, and the volume per mole in the standard condition is , then the volume of moles h2 is therefore the volume is .
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Anonymous users2024-02-05In the standard state of Hydrogen molecular weight2 so.
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Anonymous users2024-02-04How much does hydrogen weigh in 1 cubic meter? 1 cubic meter of hydrogen is equal to a ton equal to a kilogram = kilogram. The process of solving the problem is as follows:
Solution: According to the formula mass = volume x density, it can be obtained that the mass of hydrogen = the volume of hydrogen and the density of hydrogen = 1 cubic meter gram liter.
1 cubic meter kilogram cubic meter.
Kilograms = tons.
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Anonymous users2024-02-03The volume of 6g of hydrogen is the mass of 2L of hydrogen is the volume of the calculation formula v=m, and the mass calculation formula m= v
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Anonymous users2024-02-0256 grams of hydrogen is 28mol.
According to the molar mass of hydrogen.
is 2g mol, and n = m m, then it is 56 2 = 28 mol.
Mole (mole), referred to as mole, formerly known as gram molecule, gram atom, symbol mol, is the amount of matter that is messed up.
is the International System of Units.
One of the 7 basic units. Every 1 mole of any substance (microscopic substance, such as molecules, atoms, etc.) contains the Avogadro constant (about one particle. When using moles, elementary particles should be specified and may be atoms, molecules, ions and other microscopic particles, or specific combinations of these microscopic particles.
About one atom is 1 mole, just like people often say that a dozen refers to 12, and "mole" is just a special unit like "dozen". g) c(carbon-12) contains 1 mole of atoms.
On November 16, 2018, the 26th International Conference on Weights and Measures adopted the resolution on "Revision of the International System of Units", officially updating the definition of four basic units, including the international standard unit of mass "kilogram". The new SI system of units uses physical constants to redefine the unit of mass "kilogram" and the unit of current "ampere".
The unit of temperature "Kelvin" and the unit of quantity of matter "mole".
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Anonymous users2024-02-01Summary. Oxygen is a colorless and odorless gas and is the most common elemental form of oxygen. Melting point, boiling point -183 .
Not easily soluble in water, about 30ml of oxygen is dissolved in 1L of water. In the air, oxygen accounts for about 21%. Liquid oxygen is sky blue.
Oxygenation is a blue crystal. Oxygen is the most widely distributed in nature, covering the mass of the crust, and is the most abundant element. Oxygen is needed for the oxidation of hydrocarbons, the treatment of wastewater, rocket propellants, and the respiration of animals and humans in aviation, aerospace and diving.
Hello dear, 16 grams of oxygen and grams of hydrogen occupy a volume of liters. Oxygen is a single dispersed substance formed by oxygen elements, with the chemical formula O2, its chemical properties are relatively active, and most elements can be recoiled with oxygen. It is not very active at room temperature, and it is not easy to interact with many substances.
However, it is very active at high temperatures and can be directly combined with a variety of elements, which is related to the electronegativity of oxygen, which is second only to fluorine.
Oxygen is a colorless and odorless gas and is the most common elemental form of oxygen. Melting point, boiling point -183 . Not easily soluble in water, about 30ml of oxygen is dissolved in 1L of water.
In the air, the residual air of the oxygen shirt accounts for about 21%. Liquid oxygen is sky blue. The solid oxygen is a blue crystal bridge comma.
Oxygen is the most widely distributed in nature, covering the mass of the crust, and is the most abundant element. Oxygen is needed for oxidation-sensitive hydrocarbons, wastewater treatment, rocket propellants, and respiration for animals and humans in aviation, aerospace and diving.
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Anonymous users2024-01-31Hydrogen is the least dense gas known in the world, and the density of hydrogen is only 1 14 of air, that is, at 0, at a standard atmospheric pressure, the density of hydrogen is.
At room temperature and pressure, hydrogen is a highly flammable, colorless, transparent, odorless and tasteless gas that is insoluble in water. Therefore, hydrogen can be used as a filling gas for airships and hydrogen balloons (because hydrogen is flammable and not safe, airships are now mostly filled with helium). Hydrogen is the substance with the smallest relative molecular mass and is mainly used as a reducing agent.
Industrially, hydrogen is generally produced from natural gas or water gas, rather than using the energy-intensive method of electrolysis of water. The hydrogen produced is used in large quantities for cracking reactions and ammonia production in the petrochemical industry.
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Anonymous users2024-01-30According to the standard gas per mole volume liters, hydrogen per mole 2g, density 2
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Anonymous users2024-01-29Standard condition: 4 g hydrogen.
The amount of sock quality that is slippery.
4 2 mol = 2 mol, body signal radical product simple pose = 2 = l
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