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azamat
2 years ago
5

explain, in therms of intermolecular forces, why greasy engine parts are better cleaned using petrol or kerosene as the solvent

than water.
Chemistry
1 answer:
coldgirl [10]2 years ago
6 0

Answer:

Grease is insoluble in water but soluble in kerosene

Explanation:

The molecules in grease are non polar molecules and so can not react with water which is polar to generate enough solvation energy. On the other hand kerosine is non polar so reacts with grease to generate enough solvation energy to dissolve it.

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The reason an increase in substrate concentration does not increase the reaction rate indefinitely is because
scoundrel [369]

Answer:

Increasing substrate concentration also increases the rate of reaction to a certain point. Once all of the enzymes have bound, any substrate increase will have no effect on the rate of reaction, as the available enzymes will be saturated and working at their maximum rate.

3 0
3 years ago
All of the following are true concerning enzymes, except that they:
suter [353]

Answer:

D (or E If properly listed to include the active site option)

Explanation:

A. Is true

Enzymes are organically biochemical catalyst and thus they can speed up the rate of chemical reaction in the body

B is true

They are catalysts as said earlier

C is true

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D. Enzymes are proteins

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8 0
3 years ago
How many atoms are there in 23g of Na? How would I attempt this question. Thanks
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Avodagros number i.e. 6.023 ×10^23
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3 years ago
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Which best evaluates the following statement: It's greener to wash dishes by hand than to use a dishwasher?
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<span>It is true that energy efficient dishwasher is a water and energy saver than washing dishes by hand. A star-rated dishwasher uses 4 gallons of water in each cycle compare to a kitchen faucets who pumps out 2.5 gallons of water per minute. To conserve water, the accumulated dishes and cookware must be stack properly in a dishwasher before running a cycle. As to conservation of energy, people tend to use warm water to wash the dishes by hand and heating of water cost much, while in a dishwasher, energy-saving tips such as running a light cycle and turning off heating drying option will mark down your energy consumption. Therefore, the use of dishwasher is a much greener idea. </span>

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Which of the following describes a boiling point?
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Answer:

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Explanation:

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