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Svetradugi [14.3K]
3 years ago
11

Choose all the answers that apply.

Chemistry
1 answer:
Minchanka [31]3 years ago
7 0

Answer:

All of the above. The CV system transports blood and plasma the do all 4.

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An ion with an atomic number of 34 and 36 electrons has a __________ charge
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<span>negative charge. The atomic number of 34 tells you immediately that the ion has 34 protons. Since it also has 36 electrons, it has 2 more electrons than needed to be neutral. So the ion will have a negative charge since electrons have a negative charge.</span>
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Why is the arm often described as a sort of lever?
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Melting of ice is a spontaneous reaction at room temperature and pressure because melting is accompanied by _____.
ki77a [65]

Answer:

An increase in entropy

Explanation:

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Just think about this rationally. Melting ice (or anything) will require heat put in (this is called the latent heat of fusion), so you automatically know that the change in enthalpy is going to be positive. In order to make the reaction spontaneous, delta G, the Gibbs free energy has to be negative. So now look at the formula Delta(G) = Delta(H) - T*Delta*(S). If you know that g is negative, and H is positive, then it is only possible if -T*Delta(S) is negative. If that is positive, then Delta(S) has to be positive. So theres your answer :). An increase in entropy

4 0
3 years ago
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