1 个(NH4)2HPO4 有2*4+1 = 9 个 H 所以1 mol (NH4)2HPO4 含有 9 mol H 现在 含有2 mol H，所以 (NH4)2HPO4的物质的量 是 2/9 mol
Two atoms of hydrogen combine with one atom of___ (氧气) to form a molecule of water. 答案 答案是oxygen.本题考查语境中选用恰当的词或短语;oxygen n. 氧气;氧;不可数;one atom of oxygen一个氧原子;故答案是oxygen. 结果二 题目 【题目】Two atoms of hydrogen combine withone atom of_(氧气)...
One mole of hydrogen atoms weighs just over a gram. molen(breakwater)SCSimplified Chinese防浪堤fáng làng dī SCSimplified Chinese防浪墙 The marina was protected by a mole. molen(harbor)SCSimplified Chinese有防浪堤的海港 The ship pulled into the mole in the evening. ...
"One mole" is close to the number of atoms in a gram of hydrogen. It’s also, by chance, a decent ballpark guess for the number of grains of sand on Earth. A mole is also a type of burrowing mammal. There are a handful of types of moles, and some of them are truly horrifying...
Chemical equation showing the formation of water. The coefficients in front of the substances show the ratio in which the substances react. One mole of oxygen is needed to produce two moles of water so the mole ratio between hydrogen and water would be 1 mole of hydrogen/2 moles of water....
The atomic mass of hydrogen is 1.00794 and that of oxygen is 15.9994. Since there are two hydrogen atoms per molecule and one oxygen atom, the formula should look like this: molar mass (g) = 1.00794 g + 1.00794 g + 15.9994 g Therefore, the molar mass of H2O is 18.01528 g. Of...
The balanced equation is 2H2 + O2 –> 2 H2O. It takes two hydrogen atoms for every oxygen atom to produce this reaction, so the mole ratio between hydrogen and oxygen is 2:1. The reaction produces two water molecules, so the mole ratio between oxygen and water is 1:2, but the mole...
例如:锌原子(zinc atoms),水分子(water molecules),氯化钠分子(sodium chloride formula units)下列物质有多少摩尔原子?(mole of atoms)(三位小数)4.6克的锌(zinc),0.156克的钙(calcium),5.3克的氢(hydrogen)下列物质有多少摩尔分子(mole of molecules)(三位小数)...
The balanced equation is 2H2 + O2 –> 2 H2O. It takes two hydrogen atoms for every oxygen atom to produce this reaction, so the mole ratio between hydrogen and oxygen is 2:1. The reaction produces two water molecules, so the mole ratio between oxygen and water is 1:2, but the mole...
The number of moles of a molecule may not always be equal to the number of moles of its constituent elements. For example, a mole of water contains NA number of H2O molecules. However, each water molecule contains 2 hydrogen atoms and one oxygen atom. Therefore, one mole of H2O contains...