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) ...
The atomic mass of hydrogen is1.00794and that of oxygen is15.9994. 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 is18.01528 g. ...
Water (H2O) is made from 2atomsof hydrogen and 1 atom of oxygen. A mole of water molecules would be 2 moles of hydrogen atoms plus 1mole of oxygenatoms. From theperiodic tablewe see theatomic weightofhydrogenis 1.0079 and the atomic weight ofoxygenis 15.9994. Atomic massis thenumber of ...
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)...
翻译:含有2 mol H原子 的 (NH4)2HPO4 是多少 mol 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
because a hydrogen peroxide molecule contains two oxygen atoms, as opposed to the water molecule, which has only one, the two substances exhibit very different properties. Today, we possess sophisticated instruments that allow the direct measurement of these defining microscopic traits; however, the ...
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)...
Mole (unit) facts. Mole is the SI unit used to measure how many molecules or atoms there are. One mole is around 600 sextillion molecules. Scientists use this number because 1 gram of hydrogen is around 1 mole of atoms.
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. ...
If a sample of C7H8 has 2.3 moles of hydrogen atoms, how many moles of carbon atoms does it have? How many moles of atoms are present in 154 grams of HCI? How many atoms are in one mole of methane (CH4)? How many atoms are in 9.77 moles of Ne?