Chemistry, 23.07.2019 03:30 Lovebamagirl12

For each of the following pairs of elements, predict whether they will form a bond that is primarily ionic or one that is primarily covalent. explain your answers. lithium (li) and oxygen (o) chlorine (cl) and fluorine (f) calcium (ca) and sulfur (s)

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Answer from: amcd2002

Types of Bonds can be predicted by calculating the difference in electronegativity.
If, Electronegativity difference is,

Less than 0.4 then it is Non Polar Covalent

Between 0.4 and 1.7 then it is Polar Covalent

   Greater than 1.7 then it is Ionic

For Li and O,

E.N of Oxygen   = 3.44

E.N of Lithium     = 0.98

E.N Difference 2.46 (Ionic Bond)

For Cl and F,
E.N of Fluorine   = 3.98

E.N of Chlorine     = 3.16

E.N Difference 0.82 (Mildly Polar Covalent Bond)

For Ca and S,
E.N of Sulfur    = 2.58

E.N of Calcium = 1.00

E.N Difference 1.58 (Polar Covalent Bond)

Answer from: Quest

a pan containing water is placed in a positio n where it is exposed to a 10 mile per hour wind. the pan contains a uniform depth of 1.27 cm of water, is quite wide, and has a length of 2.44 m in the wind direction. the water in the pan is at a constant temperature of 15.5 °c.

Answer from: Quest

Density= mass/volume so 5.1 divided by 4.7 is 5.1 / 4.7 =1.08510638298round to the correct number of sig figs

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