BBC4 年
Chemistry calculations - Edexcel Finding the % of an element in a compound by mass
of~an~element} = \frac{mass~of~an~element~in~the~compound}{relative~formula~mass~M_r} \times 100\) There are six atoms of hydrogen in the compound, so the mass of hydrogen is 6 × 1 = 6.
Radio France Internationale11 天
Antoine Lavoisier: The Frenchman who transformed chemistry forever
Antoine Lavoisier didn’t just study chemistry—he transformed it  Known as the Father of Modern Chemistry, he shattered old ...
C&EN1 年
Lesson 3.1: What is Density?
Copper atoms are larger than aluminum atoms. There are fewer copper atoms than aluminum atoms in the cubes. Copper atoms are much more massive than aluminum atoms. The extra mass makes copper more ...
Dal8 年
Mass Spectrometry Techniques
Most modern techniques ionize compounds by chemical reactions and the results obtained need to be interpreted. Users unfamiliar with Mass Spectrometry are advised to consult with Xiao Feng about what ...
Dal8 年
Chemistry Mass Spectrometry Core Facility
high-resolution (accurate mass) services are available for ESI, APCI and APPI. Researchers within and outside the Department of Chemistry can access the mass spectrometry facilities through service ...