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kramer
3 years ago
11

Which statement is false?

Chemistry
1 answer:
emmasim [6.3K]3 years ago
5 0

Answer:

  • <u><em>The first statement is false:  a.At equilibrium, equal amounts of products and reactants are present. ΔG° is a function of Keq.</em></u>

Explanation:

When one part of a statement is false, the whole statement is false.

At <em>equilibrium,</em> the amounts of products and reactants does not have to be equal.

At equlibrium the rates of the forward reaction and the reverse reaction must be equal.

An equilibrium reaction may be represented by:

  • A + B ⇄ C + D

That represents two reactions:

  • Direct reaction: A + B → C + D (A and B yield C and D)

  • Reverse reaction: A + B ← C + D (C and D yield A and B: note that the arrow goes from right to left)

So, it is when the direct and the forward rates are equal that there is not net change in the amounts of all the species and so the reaction is is equilibrium).

As per the other statement, both parts are true:

  • When reactants become products, they do so through an intermediate transitrion state: when the reactants approach each other and collide with enough energy and appropiate position, the bonds start to break and the bonds of the products start to form. This is the transition state.

  • Most biocatalysts are proteins: enzymes are simply proteins, with specific structures, that may accelerate or even deceralate biochemical reactions.
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Answer:

D. These elements have properties of both metals and nonmetals.

Explanation:

It can be concluded that the elements have properties of both metals and non-metals.

The elements that borders the ones described are both metals and non-metals. Most of these elements can be classified as metalloids.

On the periodic table, the elements around this region have properties of both metals and non-metals at certain temperature and pressure conditions.

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3 years ago
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Answer : The crown is not made of pure (100%) gold.

Explanation :

Formula used :

\frac{W_{apparent}}{W_{actual}}=1-\frac{\rho_w}{\rho_c}

where,

W_{apparent} = apparent weight of the crown in water = 4.50 N

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\rho_w = density of water = 1.00g/cm^3

\rho_c = density of crown = ?

Now put all the given values in the above formula, we get:

\frac{4.50N}{5.00N}=1-\frac{1.00g/cm^3}{\rho_c}

\rho_c=10g/cm^3

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Answer:

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Explanation:

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b

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