The correct answer is: False.
_______________________________________________________
Water expands (gets larger/ is less dense in solid form than in liquid form) when it freezes).
_______________________________________________________

6 0

3 years ago

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You will analyze four substances in this lab. Based on their chemical formulas and what you already know about covalent and ioni

Phoenix [80]

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 $NaHCO_3$ is formed by transfer of electrons from sodium to $HCO_3$ .Ionic compounds are soluble in water.

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3 years ago

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Unknown compounds can usually be identified based solely on their _____.

34kurt

Hysical proprerties i think

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2 years ago

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What is the empirical formula for a compound that contains 1.18 mol na, 1.18 mol n, and 3.53 mol o?

nikitadnepr [17]

Answer is: NaNO₃.
n(Na) = 1,18mol.
n(N) = 1,18mol.
n(O) = 3,53mol.
n(Na) : n(N) : n(O) = 1,18mol : 1,18mol : 3,53mol / ÷1,18
n(Na) : n(N) : n(O) = 1 : 1 : 3.
Empirical formula is NaNO₃ (sodium-nitrate).
Empirical formula of compound is the simplest ratio of atoms present in a compound.

6 0

3 years ago