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Nitella [24]
3 years ago
5

Science Questions

Chemistry
2 answers:
dimulka [17.4K]3 years ago
7 0

1)
E.) microwaves
2)
B.) Gamma rays
3)
E.) space

4)
B.) crest

5)
A.) trough

6)
D.) frequency


7)
C.) wavelength


8) 21/3= 7Hz

9)
True

10)
True

11)
True
navik [9.2K]3 years ago
4 0
9. Is true
Sorry I'm not really learning that right now but I'll try googling the answers
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Which increases the likelihood that a dead organisms will be fossilized
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When an organism is buried quickly there is less decay and better the chance for it to be persevere. The hard parts of the organism such as bones, shells, and teeth have a better chance of becoming fossils that softer parts of the organism. HARD BONES.
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The standard free energy of formation, ΔG∘f, of a substance is the free energy change for the formation of one mole of the subst
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Answer:

B. 2 Na(s) + O₂(g) → Na₂O₂(s); ΔG∘f=−451.0 kJ/mol

D. 2 SO(g) + O₂(g) → 2 SO₂(g); ΔG°f=−600.4 kJ/mol

Explanation:

The spontaneity of a reaction  is given by the value of the standard Gibbs free energy of the reaction (ΔG°rxn). The more negative is the ΔG°rxn, the more spontaneous is a reaction.

The ΔG°rxn can be calculated using the following expression:

ΔG°rxn = ∑np × ΔG°f(products) − ∑nr × ΔG°f(reactants)

By definition, the standard Gibbs free energy of formation of simple substances in their most stable state is zero. That is why, in the reaction of formation of a compound ΔG°rxn = ΔG°f(product).

<em>Based on the standard free energies of formation, which of the following reactions represent a feasible way to synthesize the product? </em>

<em>     A. N₂(g) + H₂(g) → N₂H₄(g); ΔG°f=159.3 kJ/mol. </em>

<em>     </em>Not feasible. ΔG°rxn = ΔG°f(product) > 0.

    <em>B. 2 Na(s) + O₂(g) → Na₂O₂(s); ΔG°f=−451.0 kJ/mol</em>

    Feasible. ΔG°rxn = ΔG°f(product) < 0.

    <em>C. 2 C(s) + 2 H₂(g) → C₂H₄(g); ΔG°f=68.20 kJ/mol</em>

    Not feasible. ΔG°rxn = ΔG°f(product) > 0.

    <em>D. 2 SO(g) + O₂(g) → 2 SO₂(g); ΔG°f=−600.4 kJ/mol</em>

    Feasible. ΔG°rxn = ΔG°f(product) < 0.

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A roller coaster track is 3,000 meters long. It takes 100 seconds totravel once around the roller coaster. What is the average s
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What is the molar mass of Pb(Cr2O7)2
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The molar mass of Pb(Cr2O7)2 is 639.2 g/mol.

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A fusion reaction releases energy because the binding energy of the resulting nucleus:______.
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a. is released in the process

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