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lisov135 [29]
3 years ago
5

ATP is a source of free energy that drives unfavorable reactions. Which of the processes are coupled to the dephosphorylation of

ATP? a. de novo (from scratch) anabolism of nucleotides b. the exergonic hydrolysis of creatine phosphate c. reversible isomerization of glucose‑6‑phosphate to fructose‑6‑phosphate during glucose catabolism d. myosin action during muscle contraction e. membrane transport that maintains levels in cells One reason that ATP is a source of energy is that the products of ATP hydrolysis have less free energy than the reactants. Why? formation of ion pairs involving ATP resonance stabilization of free phosphate electrostatic repulsion in ATP hydrogen bonding between free phosphate and water.
Chemistry
1 answer:
EleoNora [17]3 years ago
3 0

Answer:

The correct statements are a denovo anabolism of nucleotides d myosin action during muscle contraction e membrane transport that maintain levels in the cell.

Explanation:

ATP or adenosine tri phosphate is an high energy compound.The hydrolysis of ATP helps to drive many thermo dynamically unfavorable reaction.The processes which are coupled to the de phosphorylation of ATP are given below.

1 De novo synthesis of nucleotides that requires energy in form of ATP.

2 During muscle contraction the sliding of thick filaments or myosin over thin filament or actin requires energy derived from the hydrolysis of ATP.

3  Membrane transport basically active transport helps in the uphill transport of ions that requires free energy in form of ATP.

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The answer to this is C. 
3 0
3 years ago
A 1.44-g sample of an unknown pure gas occupies a volume of 0.335 L at a pressure of and a temperature of 100.0°C. The unknown g
Zepler [3.9K]

Answer:

Xenon

Explanation:

Step 1: Given data

  • Mass (m): 1.44 g
  • Volume (V): 0.335 L
  • Pressure (P): 1.00 atm (I looked it up)
  • Temperature (T): 100.0°C

Step 2: Convert the temperature to Kelvin

K = °C + 273.15 = 100.0°C + 273.15 = 373.2 K

Step 3: Calculate the number of moles (n)

We will use the ideal gas equation.

P × V = n × R × T

n = P × V / R × T

n = 1.00 atm × 0.335 L / (0.0821 atm.L/mol.K) × 373.2 K

n = 0.0109 mol

Step 4: Calculate the molar mass of the gas

M = 1.44 g / 0.0109 mol = 132 g/mol

Step 5: Identify the gas

The gas with a molar mass of about 132 g/mol is xenon.

8 0
4 years ago
How many significant figures are in this number? : 2.7 x 10^-3
Lady_Fox [76]

Answer:

2 significant figures i.e. 2 and 7.

Explanation:

We need to find the number of significant figures in the given number i.e. 2.7\cdot10^{-3}.

It has 2 significant figures i.e. 2 and 7.

It means the power of 10 doesn't count in the significant figures.

Hence, there are 2 significant figures.

6 0
3 years ago
1. How is the atom count for each element on the reactant side of a balanced chemical equation related to the atom count for eac
lbvjy [14]

Answer: The atom count for each element on the reactant side of a balanced chemical equation is equal to the atom count for each element on the product side of the same equation

Explanation:

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products formed must be equal to the mass of reactants taken.

In order to get the same mass on both sides, the atoms of each element must be balanced on both sides of the chemical equation.

2H_2+O_2\rightarrow 2H_2O

Thus there are 4 atoms of hydrogen on reactant as well as product side.

Also there are 2 atoms of oxygen on reactant as well as product side.

5 0
3 years ago
How many moles of nitrogen dioxide gas will be produced if 25.0 ml of 2M nitric acid react?
Evgen [1.6K]

Answer:

0.025 moles of NO₂  will produced

Explanation:

Given data:

Moles of NO₂ formed = ?

Volume of HNO₃ = 25.0 mL

Molarity of HNO₃ = 2 M

Solution:

Chemical equation:

Cu + 4HNO₃   →        Cu(NO₃)₂ + 2NO₂ + 2H₂O

Number of moles of HNO₃:

Molarity = number of moles /  volume in L

2M = number of moles / 0.025 L

Number of moles = 2 M × 0.025 L

Number of moles = 0.05 mol

Now we will compare the moles of HNO₃  with NO₂  from balance chemical equation.

                                  HNO₃            :          NO₂

                                      4                :            2

                                 0.05               :         2/4×0.05 =0.025

0.025 moles of NO₂  will produced.

                                     

6 0
3 years ago
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