To calculate the number ofmoleculesand atoms in a water drop, you need to know the chemical formula of water. There are two atoms of hydrogen and one atom of oxygen in each water molecule, making the formula H2O. So, each molecule of water contains 3 atoms. Molar Mass of Water Determine...
Water is made up of two elements, hydrogen and oxygen. How many hydrogen atoms are there in one molecule of water? A. One B. Two C. Three D. Four 相关知识点: 试题来源: 解析 B。解析:一个水分子的化学式是H₂O,这表示一个水分子由两个氢原子和一个氧原子组成,所以答案是B。A选项一...
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For many years, scientists couldn’t figure out how atoms and molecules combined to make living things. Plants, fish, dinosaurs, and people are made of atoms and molecules, but they are put together in a more complicated way than the molecules in the primitive ocean. What’s more, living ...
How many moles are in 11.3 grams of {eq}H_2 {/eq}? Molecular Compounds: Water is an example of a molecular compound that exists in terms of discrete molecules. A water molecule contains non-metal atoms known as H and O. These elements are combined by covalent bonds. ...
Can atoms be destroyed? No atoms are destroyed or created. The bottom line is: Matter cycles through the universe in many different forms. In any physical or chemical change, matter doesn't appear or disappear. Atoms created in the stars (a very, very long time ago) make up every living...
How many moles of atoms are in 4.63 x 10^21 Ca atoms?Question:How many moles of atoms are in 4.63 x 10^21 Ca atoms?The Mole:In chemistry, the mole is used for working with large numbers of atoms. Specifically, 1 mole of a substance contains 6.022×1023 atoms of the substance. This...
How many electrons are needed to form a charge of -8.30 NC? Quantization of charge: Quantization of charge means that charge on a body is in multiples of the charge on an electron. An electron carries the smallest unit of charge and it equals: {eq}e = -1.6 \times 10^{-19}...
For many years, scientists couldn't figure out how atoms and molecules on the Earth combined to make living things. Plants, fish, dinosaurs, and people are made of atoms and molecules, but they are put together in a more complicated way than the molecule
aIn Germany,students as young as 13and 14are expected to do internships.German companies work with schools to make sure that young people get the education they need for future employment 在德国,作为学生年轻人象14are期望的13and做实习。德国公司与学校一起使用确信,他们为未来就业需要的青年人得到教...