By John T Moore;Richard H. Langley
Banish bafflement during this tricky topic! From formulation and lab recommendations to the periodic desk, Chemistry for the definitely burdened makes a speciality of the parts of utmost confusion and breaks down the main tricky chemistry issues into easy-to-understand ideas. This beneficial advisor additionally teaches problem-solving abilities you must grasp this enforcing topic. no matter if you are in highschool, in collage, or just brushing up on chemistry wisdom, this enjoyable, simply available ebook will make realizing chemistry a breeze.
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Additional info for Chemistry for the Utterly Confused (Utterly Confused Series)
We call ionic compounds such as this salts. Don’t Forget! In an ionic compound there must be the same number of positive and negative charges. All compounds are neutral. 21 Atoms, Ions, and Molecules If a nonmetal reacts with another nonmetal no electrons are lost or gained, but are shared. We call such compounds covalent (molecular) compounds. These compounds contain small units we call molecules. Ammonia, NH3, water, H2O, and methane, CH4, are examples of covalent compounds. In the next section, we will show you how to name both salts and molecules.
H2O is a formula representing water, a compound composed of two atoms of hydrogen and one atom of oxygen. An empirical formula shows the atoms found in the compound and the lowest whole number ratio of those atoms. The empirical formula of water would be H2O. However, suppose another compound of hydrogen and oxygen had an empirical formula of HO. This empirical formula tells us that there is only hydrogen and oxygen in the compound and the two atoms are in a 1:1 ratio. The molecular or true formula shows what atoms we ﬁnd in the compound and the actual number of each atom.
5280 ft ϭ ? 8 ϫ 104 ft) 1 mi Unit Conversion problems can appear to be more complicated than this one. However, they are not. They just involve more simple steps. 5 mi and apply the relationship “12 in ϭ 1 ft” to do one more conversion: 18,000 ft a 12 in b ϭ ? in 1 ft This step is just like the original conversion of miles to feet. 2 ϫ 105 in) 1 ft In problems such as the mile to inch conversion, it is simpler to combine the two calculations into one. 5 mi a 5280 ft b ϭ ? 2 ϫ 105 in) 1 mi 1 ft This method allows us to get the answer without calculating an intermediate value.