The physical and chemical properties of a molecule depend on its structure. Here are two ball-and-stick models for two compounds that have the same molecular formula but different structures and different chemical properties. Ethanol Dimethyl ether

For each row in the table below, decide whether the pair of elements will form a molecular compound held together by covalent chemical bonds. If the elements will form a molecular compound, check the box and enter the chemical formula and name of the compound. (If the elements will form more than one molecular compound, use the compound with the fewest total number of atoms.) You may assume all chemical bonds are single bonds, not double or triple bonds. element #1 element #2 hydrogen magnesium fluorine fluorine nitrogen bromine 44°F Explanation Cloudy element pair will form a molecular compound Check 0 0 molecular compound chemical formula 0 0 name 000 O Search 00 3 Ⓒ2022 McGraw Hill LLC. All Rights Reserved. Terms of Use | Privacy Center | Accessibility 99+ ⠀

Why do most atoms present in nature are found to be compounds joined together rather than individual atoms?

For each compound in the table below, decide whether there would be any hydrogen-bonding force between molecules of the compound, or between molecules of the compound and molecules of water. compound hydrogen-bonding force Between molecules of the compound and molecules of water? Between formula or Lewis name molecules of the structure compound? H :0: ö- H yes O yes acetic acid Н— С O no O no H O yes O yes methanol Н - С — H O no O no O yes O no O yes hydrogen chloride HC1 O no

For each substance include its state of matter (using words, not symbols). Your sentences should include verbs (remember your telling a story). 1.) 2Ca(NO3)2(s) -> 2 CaO(s) + 4 NO2(g)+O2(g) 2.) ZnCl2(aq)+ 2 NaOH(aq) -> Zn(OH)2(s) + 2 NaCl(aq) 3.) Mg(s) + 2HCl(aq) -> MgCl(aq) +H2(g)

Explain how an experiment involving a mixture of KCl and KClO3 heated together, illustrates the law of conservation of mass.

Decide whether each molecule or polyatomic ion is polar or nonpolar. If the molecule or polyatomic ion is polar, write the chemical symbol of the atom closest to the negative side. For example, if the molecule were HCI and you decided the hydrogen atom was closest to the negative side of the molecule, you'd enter "H" in the last column of the table. molecule or polyatomic ion HCI CO₂ CH₂Cl polar or nonpolar? O polar O nonpolar O polar O nonpolar O polar O nonpolar atom closest to negative side X 0 0

Part A Based on the structure, how many electron domains surround the C atom in this molecule? Express your answer as an integer. 195| ΑΣΦ ? electron domains

Water has many exceptional and useful properties. Which is the rarest property among compounds? Water has a high heat capacity. Solid water is less dense than liquid water. Water is a solvent. Water has surface tension.

7. Identify as true (T) or false (F): All chemical particles exist in a constant state of random motion. In exothermic reactions, bonds in chemical particles generally become weaker. Matter can change its physical state with pressure alone, at a constant temperature. Dispersion forces work on only some chemical particles.