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brilliants [131]
3 years ago
12

Which statement about enzymes is true? They are large molecules that decrease the rate of reactions in the body. They are large

molecules that increase the rate of biologicallyimportant reactions. They slow the rate of chemical reactions. They are permanently changed in the course of a reaction.
Chemistry
2 answers:
shepuryov [24]3 years ago
7 0

Answer:

The correct answer is that they are large molecules that increase the rate of biologically important reactions.

Explanation:

The biological molecules made up of proteins, which substantially accelerate the rate of almost all the chemical reactions that occurs within the cells are known as enzymes. They play an essential role and are essential for life and function in a broad range of vital functions in the body, like facilitating metabolism and digestion.

iren [92.7K]3 years ago
5 0
They are large molecules that increase the rate of biologically important reactions.
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Part 1. A chemist reacted 12.0 liters of F2 gas with NaCl in the laboratory to form Cl2 gas and NaF. Use the ideal gas law equat
galben [10]

The mass of NaCl needed for the reaction is 91.61 g

We'll begin by calculating the number of mole of F₂ that reacted.

  • Volume (V) = 12 L
  • Temperature (T) = 280 K
  • Pressure (P) = 1.5 atm
  • Gas constant (R) = 0.0821 atm.L/Kmol
  • Number of mole (n) =?

PV = nRT

1.5 × 12 = n × 0.0821 × 280

18 = n × 22.988

Divide both side by 22.988

n = 18 / 22.988

n = 0.783 mole

Next, we shall determine the mole of NaCl needed for the reaction.

F₂ + 2NaCl —> Cl₂ + 2NaF

From the balanced equation above,

1 mole of F₂ reacted with 2 moles of NaCl.

Therefore,

0.783 mole F₂ will react with = 0.783 × 2 = 1.566 moles of NaCl.

Finally, we shall determine the mass of 1.566 moles of NaCl.

  • Mole = 1.566 moles
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Mass = mole × molar mass

Mass of NaCl = 1.566 × 58.5

Mass of NaCl = 91.61 g

Therefore, the mass of NaCl needed for the reaction is 91.61 g

Learn more about stiochoimetry: brainly.com/question/25830314

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