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gogolik [260]
3 years ago
5

How many molecules of lactate can one molecule of lactate dehydrogenase act on in 21 minutes?

Chemistry
1 answer:
USPshnik [31]3 years ago
6 0
The turnover number (number of molecules the enzyme can act on per second) for lactase dehydrogenase is 1,000 lactate molecules per second.
In one minute, this becomes:

(1,000 molecules / second) * (60 seconds / minute)
= 60,000 molecules / minute

In 21 minutes, this will be:

60,000 * 21

= 1.26 x 10⁶ molecules of lactate
You might be interested in
Fill In The Blanks:
yawa3891 [41]

Answers : Fill in the blanks.


Answer 1) During a chemical reaction, the sum of the masses of the reactants and products remain unchanged.


In a reaction masses of the reactants and products always remains the same.


Answer 2) In a pure chemical compound, elements are always present in a definite proportion by mass.


It is observed that in a chemical reaction the elements are found in definite proportion by mass.


Answer 3) Clusters of atoms that act as an ion are called polyatomic ions.


Polyatomic ions are those ions which consits of atoms more than two in their molecule.


Answer 4) In ionic compounds, the charge on each ion is used to determine the chemical formula of the compound.


The charges on the molecule helps to determine the chemical formula of any compound.


Answer 5) The Avogadro constant 6.022 X 10^{23} is defined as the number of atoms in exactly 12 g of carbon-12


Avogadro used carbon-12 as the standard reference element fpr determining its molecules.


Answer 6) Mass of 1 mole of a substance is called its molar mass or molecular weight.


A molecular weight of an atom to define its number of moles.


Answer 7) The abbreviation used for length names of elements are termed as their Symbols.


The abbreviation used for the length of names of elements are called as symbols.


Answer 8) A chemical formula is also known as a true formula or molecular formula.


The term chemical formula determines the number of chemical components present in it.

Answer 9) Those ions which are formed from single atoms are called monoatomic ions.


The ions made up from single atoms are called as monoatomic ions.


Answer 10) Ionic compounds are formed by the combination between metal and nonmetal.


The ionic compounds are usually bonded by the ionic bonds in a compound.


Answer 11) The valency of an ion is equal to the charge on the ion.


Valency of any ion is always equal to the charge on that ion.


Answer 12) Mole is a link between the mass of a substance and number of formula units.


Usually the mole forms a link to define the mass of the substance and its formula.


Answer 13) The SI unit of amount of a substance is mole.


Mole is considered to be the SI unit for aount of substance of any chemical compound.

Answer : true or false.


Answer 1) Formula mass of Na_{2}O is 62 amu True


As we know there are 2 moles of Na and one mole of O so it will be (2 X 23) + 16 = 62 amu.


Answer 2) Those particles which have more or less electrons than the normal atoms are called ions True


We call ions to those atoms which hav more or less electrons in their normal atoms


Answer 3) Formula for sulphur dioxide is SO_{3}. False



The formula for sulphur dioxide  is SO_{2} as the name di suggests two molecules.


Answer 4) Molar mass of ethyne (C2H2) is 26 g/mol True.


As the ethyene molecule consists of 2 C atoms and 2 H atoms it will be (12 X 2) + (2 X 1) = 26


Answer 5) 22 gm of CO2 consists of 1 mole. False

 


The 1 mole of CO_{2} contains 1 C atom and 2  O atoms (12) + (16 X 2) = 44


Answer 6) Number of molecules in 32 gram of oxygen is 6.02 x 10^{23}. False


Only 1 moles of any substance will consist of 6.02 x 10^{23} molecules.


Answer 7) Water is an atom False.


Water is a molecule of 2 atoms namely hydrogen and oxygen.


Answer 8) Formula for sulphur dioxide is SO_{2} true.


As the name suggest sulphur along with two oxygen in it.


Answer 9) Clusters of atoms that act as an ion is called polyatomic ion. True


The clusters of ions from different atoms of the elements can be called as polyatomic ions.


Answer 10) Mass of 1 mole of a substance is called its formula mass. False.


As in formula mass we take the sum of the atomic weights of atoms in a molecule. And for 1 mole of a substance it is called as molar mass.


Answer 11) In a pure chemical compound, elements are always present in a definite proportion by mass. True


In any chemical reaction, the pure chemical compound is always found to have elements with definite proportion to their masses.


5 0
3 years ago
Fill in the coefficients that will balance the following reaction: a0NH4Cl + a1Ag3PO4 → a2AgCl + a3(NH4)3PO4
rosijanka [135]
The equation of the reaction before balancing is 
a0NH₄Cl + a1Ag₃PO₄ → a2AgCl + a3(NH₄)₃PO₄
PO₄³⁻ ion is balanced. 
on the left side, theres 1 (NH₄⁺) ion and right side 3 (NH₄⁺) ions. Therefore if we put the coefficient for NH₄Cl, we will obtain the following equation 
3 NH₄Cl + a1Ag₃PO₄ → a2AgCl + a3(NH₄)₃PO₄
3 Ag⁺ ions on the left side and 1 Ag⁺ ion on the right side, so if we put the coefficient of AgCl as 3, following equation obtained 
3 NH₄Cl + a1Ag₃PO₄ → 3 AgCl + a3(NH₄)₃PO₄
Cl⁻ ions are also balanced now, 3 on either side.
a1 and a3 are 1 as those compounds are as it is, so coefficient is 1 for both 


balanced equation is as follows 
3 NH₄Cl + Ag₃PO₄ → 3 AgCl + (NH₄)₃PO₄
coefficients are 
a0 - 3
a1 - 1
a2 - 3
a3 - 1
8 0
2 years ago
PLEASE HELP WILL MARK BRAINLIEST
Zielflug [23.3K]

Answer:

1. There are 7 categories:

Radio waves, microwaves, infrared heat waves, visible light spectrum, ultraviolet waves, x-rays, gamma rays

2. They are all electromagnetic radiation.

3. The amount of energy the photons within them have.

4. The longer the wavelength, the less energy. The shorter the wavelength, the more energy. They are inversely proportional.

5. As the wavelength increases, the smaller the frequency. The shorter the wavelength, the larger the frequency. They are inversely proportional. Also, wavelength is measured in meters and frequency is measured in hertz (cycles per second). They are two of the 3 ways EM radiation is expressed.

6/7 Reds have the least. Violets have the most.

8. Violet has the shortest. Red has the longest.

9. Ultra Violet B-Rays (UV-B) are the harmful rays that cause sunburn.

10. Microwaves are generally used for radar technology.

11/12 You are exposed to all of the categories of the electromagnetic spectrum everyday of every year. You just can't see/feel them all.

hope this helps! stay happy and healthy, friend! :))

Explanation:

3 0
3 years ago
In which of the following choices is the oxidation number incorrect?
8_murik_8 [283]

Cl2(s); oxidation number 1 is the incorrect choices in oxidation number.

Explanation:

In the elemental form oxidation state is zero. Here chlorine is present in elemental form so oxidation state is zero.

Oxidation number depends on the number of electrons gained or lost by an atom of the element say in compound formation.

If electron is gained oxidation number becomes negative.

If electron is lost then oxidation number is positive.

If the octet rule is fulfilled that valence shell is filled them atomic number gets zero. Since Cl2 is in neutral state the oxidation number is 0.

Oxidation number in general can be made out by checking the valency of the element as oxidation number is also equal to the valency.

4 0
3 years ago
A compound with an empirical formula of CH2O has a molar
NeTakaya

Answer:

c2h4o2

Explanation:

I am using my cell. This could take a bit

The Empical formula has a mass of

C 12

2H 2

O 16

total = 30

The molecular mass is given as 60 which is 2 times the empirical mass. Therefore multiply each element by 2 in the empirical formula.

You get C2H4O2

5 0
2 years ago
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