Buildings are more dense than the surrounding air. This means that they have more _____ per volume than the air and will stay on
2 answers:
Answer: Option (a) is the correct answer.
Explanation:
Density is defined as the mass present in a substance in per unit volume.
Mathematically, Density =
Since, density is directly proportional to mass. Hence, more is the mass present per volume of a substance more will be its density. As a result, denser will be the object.
Therefore, we can conclude that buildings are more dense than the surrounding air. This means that they have more mass per volume than the air and will stay on the ground instead of floating up into the atmosphere.
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Answer: Oil: covalent
Cornstarch: Covalent
Sodium chloride: Ionic
Sodium bicarbonate: Ionic
Explanation: Covalent compounds are formed by sharing of electrons between non metals whereas ionic compounds are formed by transfer of electrons from metals to non metals.
1. Oil, which is built from the nonmetals hydrogen, carbon, and oxygen: forms a covalent compound by sharing of electrons between non metals hydrogen, carbon, and oxygen. Covalent compounds are insoluble in water.
2. Cornstarch, a carbohydrate consisting of hydrogen, carbon, and oxygen: forms a covalent compound by sharing of electrons between non metals hydrogen, carbon, and oxygen. Covalent compounds are insoluble in water.
3. Sodium chloride (table salt), whose formula is NaCl is formed by transfer of electrons from sodium to chlorine.Ionic compounds are soluble in water.
4. Sodium bicarbonate, whose formula is is formed by transfer of electrons from sodium to
.Ionic compounds are soluble in water.