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3 years ago

Which change to an object would double its kinetic energy?

Chemistry

1 answer:

Rina8888 [55]3 years ago

4 0

Answer:

Increasing its mass to twice its original value

Explanation:

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What kind of chemical reaction does the chemical equation sodium + chlorine → sodium chloride represent? combustion decompositio

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3 years ago

58-Ni has an atomic number of 28 which are the protons and a mass number of 58. Since the mass number is 58 this is the protons

Kaylis [27]

Answer:

Explanation: Nickel is element number 28 on the period table with a mass number 58 or 60, it exist in two forms and the phenomenon is known as isotopy

Definition of Isotopy is simply a phenomenon whereby elements exist in various forms that have the exact same chemical properties but different atomic mass.

58-Ni has atomic number 28 because that's the number o the element on the periodic table. Proton number is the same as atomic number and same as electron number for a neutral element or element without charge.

Mass number = Proton number (P) + Neutron number (N)

58 = 28 + N

N= 58-28

N= 30

58-Ni has 28 has the atomic number, proton number and electron number because it is a neutral atom but the neutron is 30 as shown in the calculation above.

60-NI+2 has a contrasting figure because the element has a charge of +2

Mass number= Proton + Neutron

60 = 28 + N

N= 60 - 28

N= 32

Electron = Proton - Charge

28 - (+2)

28 - 2

Electron = 26

The number of electron in 60-Ni +2 differs from 58-Ni because of the number of charge

Electron number differs from proton number in any element with a charge.

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4 years ago

The protein catalase catalyzes the reaction The Malcolm Baldrige National Quality Award aims to:

Marina CMI [18]

The question is missing a part, so the complete question is as follows:

The protein catalase catalyzes the reaction The Malcolm Bladrigde National Quality Awards aims to: 2H2O2 (aq) ⟶ 2H2O (l) + O2 (g) and has a Michaelis-Menten constant of KM = 25mM and a turnover number of 4.0 × 10 7 s -1. The total enzyme concentration is 0.012 μM and the intial substrate concentration is 5.14 μM. Catalase has a single active site. Calculate the value of Rmax (often written as Vmax) for this enzyme. Calculate the initial rate, R (often written as V0), of this reaction.

1) Calculate Rmax

The turnover number (Kcat) is a ratio of how many molecules of substrate can be converted into product per catalytic site of a given concentration of enzyme per unit of time:

Kcat = $\frac{Vmax}{Et}$ ,

where:

Vmax is maximum rate of reaction when all the enzyme sites are saturated with substrate

Et is total enzyme concentration or concentration of total enzyme catalytic sites.

Calculating:

Kcat = $\frac{Vmax}{Et}$

Vmax = Kcat · Et

Vmax = 4× $10^{7}$ · 1.2 × $10^{-8}$

Vmax = 4.8 × $10^{-1}$ M

2) Calculate the initial rate of this reaction (R):

The Michaelis-Menten equation studies the dynamics of an enzymatic reaction. This model can explain how an enzyme enhances the rate of a reaction and how the reaction rate depends on the concentration of the enzyme and its substrate. The equation is:

V0 = $\frac{[S].(Vmax)}{KM + [S]}$ , where:

[S] is the substrate's concentration

KM is the Michaelis-Menten constant

Substituting [S] = 5.14 × $10^{-6}$ , KM = 2.5 × $10^{-4}$ and Vmax = 4.8 × $10^{-1}$ , the result is V0 = 0.478 M.

The answers are Vmax = 4.8 × $10^{-1}$ M and V0 = 0.478 M.

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