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pychu
9 days ago
7

How many milligrams of MgI2 must be added to 257.7 mL of 0.087 M KI to produce a solution with [I−] = 0.1000 M?

Chemistry
1 answer:
KiRa [971]9 days ago
4 0

Response:

To reach the answer, 465.6 mg of MgI₂ is required.

Detailed Explanation:

We need to establish the moles of ion I⁻ in the resulting solution.

C = n/V -> n = C x V = 0.2577 (L) x 0.1 (mol/L) = 0.02577 mol.

In the initial solution, there was 0.087 M KI, which we can similarly convert into moles, yielding 0.02242 mol.

This indicates we require an additional amount of 0.02577 - 0.02242 = 0.00335 mol of I⁻. Since each molecule of MgI₂ produces two I⁻ ions, we divide 0.00335 by 2 to determine the moles of MgI₂, giving us 0.001675 mol.

Consequently, the quantity of MgI₂ to be added is:

Weight of MgI₂ = 0.001675 mol x 278 g/mol = 0.4656 g = 465.6 mg

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The Michaelis‑Menten equation models the hyperbolic relationship between [S] and the initial reaction rate V 0 V0 for an enzyme‑
alisha [964]

Answer:

The equation formulated by Michaelis-Menten is expressed as

v₀ = Kcat × [E₀] × [S] / (Km + [S])

in which,

Kcat denotes the experimental reaction rate constant; [S] signifies the concentration of the substrate, and

Km represents the Michaelis-Menten constant.

Explanation:

Refer to the attached image for an in-depth clarification

3 0
9 days ago
An infant acetaminophen suspension contains 80 mg/0.80 mL suspension. The recommended dose is 15 mg/kg body weight.
KiRa [971]

Response:

0.8853 mL

Clarification:

Initially, we convert 13 lb to kg, remembering that 1 lb = 0.454 kg:

  • 13 lb * \frac{0.454kg}{1lb} = 5.902 kg

Next, we determine the required mg of acetaminophen to administer, applying the recommended dosage and infant's weight:

  • 15 mg/kg * 5.902 kg = 88.53 mg

Finally, we compute the necessary mL of suspension, utilizing its concentration:

  • 88.53 mg ÷ (80 mg/0.80 mL) = 0.8853 mL
8 0
7 days ago
Every single-celled organism is able to survive because it carries out *
castortr0y [923]

Every unicellular organism prospers by executing metabolic activities.

Metabolic activities encompass the set of chemical reactions essential for sustaining life.

Explanation:

Different metabolic pathways maintain an organism's viability. Various metabolic activities occur in all living organisms.

These include processes like cellular respiration, reproduction, excretion, and digestion. Each living cell engages in these activities to survive.

Organisms acquire the energy necessary for these activities through food consumption.

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6 0
8 days ago
The ionic radius of a sodium ion is 2.27 angstroms (A) . What is this length in um
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\boxed{\sf 1Å=10^{-10}m}

\\ \rm\longmapsto 2.27Å

\\ \rm\longmapsto 2.27\times 10^{-10}m

\\ \rm\longmapsto 0.227\times 10^{-9}m

\\ \rm\longmapsto 0.0227\times 10^{-8}m

\\ \rm\longmapsto 0.00227\times 10^{-7}m

\\ \rm\longmapsto 0.00023\times 10^{-6}m

\\ \rm\longmapsto 0.00023\mu m

6 0
12 days ago
What is the symbol for the isotope of 58 co that possesses 33 neutrons?
KiRa [971]
The element with atomic number 58 is Cerium, meaning its symbol should be Ce rather than Co, which belongs to Cobalt with atomic number 27. Therefore, the notation for isotopes consists of the element's symbol accompanied by a superscript and a subscript, properly aligned. The superscript indicates the mass number.

Mass number = protons + neutrons = 58 + 33 = 91

The subscript denotes the atomic number, which is 58. This notation is illustrated in the attached image.

6 0
10 days ago
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