Potassium chloride will dissolve in water but not in oil. 1. true: because kcl is an ionic compound and water is nonpolar, whereas oil is polar. 2. true: because kcl is an ionic compound and water is polar; whereas oil is nonpolar. 3. false: because kcl is an ionic compound and water is nonpolar, whereas oil is polar. 4. false: because kcl is an ionic compound and water is polar; whereas oil is nonpolar.

Option (2) is the correct answer.

Explanation:

It is known that like dissolves like. This means that polar solvents are able to dissolve polar or ionic molecules where as non-polar solvents are able to dissolve non-polar molecules.

For example, potassium chloride (KCl) is an ionic compound and water is a polar solvent. Hence, when KCl is added in water then KCl readily dissolves as it will dissociate into ions.

Whereas oil is a non-polar solvent, therefore, when KCl is added to oil then KCl does not dissolve in oil.

Thus, we can conclude that the statement potassium chloride will dissolve in water but not in oil is true: because kCl is an ionic compound and water is polar; whereas oil is nonpolar.

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms

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.