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inn [45]
3 years ago
14

If your creating a machine that will clean up trash from the ocean is that adding or removing thermal energy?

Chemistry
1 answer:
bogdanovich [222]3 years ago
6 0

Answer: adding

Explanation:

Because it takes thermal energy to power it

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which of the following pairs of elements could react to form an ionic compound? A. potassium and calcium B. sulfur and oxygen C.
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The correct option is FLUORINE AND COPPER.
An ionic compound is usually formed by the combination of a metal and a non metal, the metal usually act as an electron donor while the non metal act as an electron acceptor. Thus, in ionic compounds, there is total transfer of electrons from the metal to the non metal. In the question given here, copper is the metal while the fluorine is the non metal.<span />
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3 years ago
Which of the following solvent pairs could be used in a solvent pair recrystallization (in general, not for this specific reacti
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Answer:

(a) Ethyl acetate and hexane, and (c) methanol and methylene chloride.

Explanation:

re-crystallization is a technique used to purify solid compound.   Ethyl acetate and hexane are good solvent pair for recrystallization because they are miscible with each other due to their good differences in polarity. ethyl acetate has polarity of 77 while hexane has 68.

water and diethyl ether are not good solvent pair for recrystallization because water and diethyl ether are immiscible. They have very far polarity values. water has 100 while diethyl ether has 35

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One molecule of glucose has 6 carbon atoms. So if you have three molecules of glucose, simply multiply 3 by 6 carbon atoms. The correct answer is C. 18 Carbon atoms. 

The correct answer for the second questions is C. Air. A homogenous mixture is a mixture in which its components are uniformly distributed throughout the mixture. It has a sigle phase.
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