chemical formula

化学式

1. 化学式：1.定义:用元素符号表示物质组成的式子叫做化学式(chemical formula) 如水的化学式是H2O,氧气的化学式为O2 ,二氧化碳的化学式为CO2. ①任何物质都有化学式吗?②同种物质可以有不同的化学式吗?2.只有纯净物才能用化学式表示其组成, 一种物质只能用一个化学式来表示③化学

2. 化學分子式：molecule分子 | chemical formula化學分子式 | atomic theory原子理論

3. 分子式：5. Specific heat 比热 | 6. Chemical formula 分子式 | 7. tetrahedral site 四面体位置

4. 化学方程式：chemical etching 化学蚀刻,化学侵蚀 | chemical formula 化学方程式 | chemical heterogeneity 化学不均一性

1. This has also protected the company from the recent melamine chemical scandal that began with infant formula and later spread to eggs.

2. The chemical has been found in infant formula and other milk products from more than 20 Chinese dairy companies in the past weeks.

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3. Sanlu ceased production in mid September after it was discovered it's baby formula was tainted with the chemical melamine.

4. chemical formula是什么意思

4. Many were found to be selling baby formula tainted with the industrial chemical melamine.

5. It involved the addition of the industrial chemical melamine to infant formula.

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