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Natalija [7]
3 years ago
14

Which statement about enzymes is true?

Chemistry
2 answers:
Lelechka [254]3 years ago
7 0

statement about enzymes that is correct is

b. they are large molecules that increase the rate of biologically important reactions

Enzymes are proteins that catalyse, in other words increase the rate of the biological reactions.

Biological functions that are vital for the bodies to survive, have large activation energy barriers. For this reason enzymes are used that reduce the activation energy required for the reaction to initiate. this enables the reactions to proceed.

Substrates bind to the enzyme, reaction occurs and substrate converts to products, that are released from the enzyme, leaving the enzyme unchanged.

so the correct answer is B.

Dimas [21]3 years ago
6 0
Enzymes are body (natural) catalysts – they increase the rate and actually are made out of aminoacids – like proteins, so large molecules. B) is the answer.
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A sample of hydrogen gas at 1.50 atm and constant volume is heated from 0∘C to 150∘C. What will be the final pressure of the gas
Julli [10]

Answer:

2.32

Explanation:

For the resolution of the problem one of the laws of Charles - Gay Lussac must be used, in which it is stated that if a<em> certain amount of gas is kept at a constant volume (as in this case), its pressure will be directly proportional to its absolute temperature.</em> Mathematically, it can be written as follows:

\frac{P}{T} = Constant ⇒to constant V

In the case of the statement, that we have an initial system (P₁ and T₁) and an final system (P₂ and T₂), the equation can be written:

\frac{P1}{T1} = \frac{P2}{T2}

It can be rearranged to clear P₂ which is what needs to be calculated, then:

P2=\frac{P1 . T2}{T1}

It would only be necessary to <em>convert the temperature units from ° C to K</em>, to have the absolute temperature values. If T (K) = t (° C) + 273.15, then:

T₁ = 0 + 273.15 = 273.15 K

T₂ = 150 + 273.15 = 423.15 K

Now, you can replace the values ​​to the equation and calculate P₂

P2 = \frac{1.50 atm . 423.15K}{273.15 K} = 2.3237atm ≅ 2.32 atm

As the statement requests the result with three significant figures and no units, the answer is that<em> the final pressure is 2.32</em>

7 0
3 years ago
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Answer:

H2O

Explanation:

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Explanation:

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