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Tcecarenko [31]
2 years ago
5

Greg classified some substances as shown in the table. Greg's Table Soluble in Water Insoluble in Water Dishwashing detergent Cl

oth Drink mix Plastic Sand Copper Why is Greg's table incorrect? Plastic is soluble in water. Copper is soluble in water. Sand is insoluble in water. Drink mix is insoluble in water.
Chemistry
2 answers:
Lisa [10]2 years ago
7 0

Answer: Option (c) is the correct answer.

Explanation:

If a substance completely dissolves in water and results in the formation of a clear solution then it means the substance is soluble in water.

For example, dish washing detergent, and drink mix are both soluble in water.

Whereas if a substance at all does not dissolve in water then we are able to see particles of the substance into the water. This substance is known as water insoluble substance.

For example, cloth, plastic, sand, and copper are all insoluble in water.

Thus, we can conclude that Greg's table is incorrect because sand is insoluble in water.

densk [106]2 years ago
6 0

Greg’s table is incorrect because sand is insoluble in water.

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3 years ago
The average bond energy (enthalpy) for a C=C double bond is 614 kJ/mol and that of a C−C single bond is 348 kJ/mol. Estimate the
AysviL [449]

Answer:

4.42x10⁻¹⁹ J/molecule

Explanation:

At a double bond, there's sigma and a pi bond, and at a single bond, there's only a sigma bond. Thus, if the energy to break both sigma and pi is 614 kJ/mol, and the energy to break only the sigma bond is 348 kJ/mol, the energy to break only the pi bond is:

E = 614 - 348 = 266 kJ/mol

Knowing that 1 kJ = 1000 J, E = 266,000 J/mol

By Avogadro's number, 1 mol = 6.02x10²³ molecules, thus:

E = 266,000 J/mol * 1mol/6.02x10²³ molecules

E = 4.42x10⁻¹⁹ J/molecule

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3 years ago
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GaryK [48]

Answer:

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Explanation:

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2 years ago
How many Earths will we need to have enough resources if the whole world lived like Americans?
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Answer:

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