Question

9 Укажите, где о водороде говорится как о простом веществе, а где — как о химическом элементе:а) водород входит в состав большинства органических соединений;б) водород — самый легкий газ;в) водородом заполняют воздушные шары;г) молекула метана

Answer 1

А) Химический элемент
б) Простое вещество
в) Простое вещество
г) Химический элемент

Answer 2

Hydrogen as a Chemical Element and a Simple Substance

а) водород входит в состав большинства органических соединений: Hydrogen is a key component of organic compounds, forming covalent bonds with other elements such as carbon to create a wide variety of organic molecules.

б) водород — самый легкий газ: Hydrogen is indeed the lightest element and the lightest gas, with a molecular weight of 1.00794 g/mol, making it the lightest element on the periodic table.

в) водородом заполняют воздушные шары: Historically, hydrogen was used to fill airships and balloons due to its low density and buoyancy. However, due to its flammability, helium has largely replaced hydrogen for this purpose.

г) молекула метана: The molecule of methane consists of one carbon atom and four hydrogen atoms, represented by the chemical formula CH4.

In summary, hydrogen is both a chemical element and a simple substance, being the lightest element and the lightest gas, and is a key component of organic compounds. Additionally, it has been historically used to fill airships and balloons, and it is a constituent of the methane molecule.