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Y_Kistochka [10]
3 years ago
15

Allena and Charissa were discussing whether Cl2 is an element or a compound. Allena said that it is an element because it has on

ly one type of atom. Charissa said that it is a compound because it has more than one atom. Who is correct?
Allena is correct. It is an element because it is only one atom.


Charissa is correct. It is a compound because it has a two.


Charissa is correct. It is a compound because it is made of more than one atom.


Allena is correct. It is an element because it is only made of chlorine atoms.
Chemistry
1 answer:
kobusy [5.1K]3 years ago
8 0
Answer is: Allena is correct. It is an element because it is only made of chlorine atoms.
A chemical element bonded to an identical chemical element is not a chemical compound since it is made from only one element and not from two different elements. Chlorine is molecule, but not compound.
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For which of the following reactions is S° > 0. Choose all that apply. N2(g) + 3H2(g) 2NH3(g) 2C2H6(g) + 7O2(g) 4CO2(g) + 6H2
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Answer: 2C_2H_6(g)+7O_2(g)\rightarrow 4CO_2(g)+6H_2O(g)

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Explanation:

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As 4 moles of gaseous reactants are changing to 2 moles of gaseous products,  the randomness is decreasing and the entropy is negative

2. 2C_2H_6(g)+7O_2(g)\rightarrow 4CO_2(g)+6H_2O(g)

As 9 moles of gaseous reactants are changing to 10 moles of gaseous products,  the randomness is increasing and the entropy is positive.

3. NH_4I(s)\rightarrow NH_3(g)+HI(g)

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5. 2NO(g)+2H_2(g)\rightarrow N_2(g)+2H_2O(l)

As 4 moles of gaseous reactants is changing to 1 moles of gaseous products, the randomness is decreasing and the entropy is negative.

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