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miv72 [106K]
2 years ago
9

Help please?

Chemistry
2 answers:
Nadusha1986 [10]2 years ago
7 0
If I am correct only 1
Reptile [31]2 years ago
5 0

Answer:

1.55x10⁻⁵ moles does the patien take each day

Explanation:

Let's find out the molar mass of ibuprofen, in first place.

C₁₃H₁₈O₂

C = 12 g . 13 = 156

H = 1 g . 18 = 18

O = 16 g. 2 = 32

156 + 18 + 32 = 206 g/mol

In 1 mol of ibuprofen, we have 206 grams of compound.

Mass of compound / Molar mass = Moles of compound

Now, let's convert mg to g

3.2 mg / 1000 = 3.2x10⁻³ g

3.2x10⁻³ g / 206 g/m = 1.55x10⁻⁵ moles

You can say 1.55x10⁻⁵ moles

1.55x10⁻⁵ moles . 1000 = 0.015 mmoles

1.55x10⁻⁵ moles . 1x10⁶ = 15.5 μmoles

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olya-2409 [2.1K]

Answer:

pH=10.97

Explanation:

the solution of methyl amine with methylammonium chloride will make a buffer solution.

The pH of buffer solution can be obtained using Henderson Hassalbalch's equation, which is:

pOH=pKb+log\frac{[salt]}{[base]}

pH = 14- pOH

Let us calculate pOHpOH=3.43+ (-0.397)=3.03

pH=14-pOH=14-3.03=10.97

[Salt] = [methylammonium chloride] = 0.10 M (initial)

After adding base

[salt] = \frac{molarityXvolume}{finalvolume}=\frac{0.1X20}{(20+50)}= 0.0286M

[base] = [Methylamine]=0.10

After mixing with salt

[base]= \frac{molarityXvolume}{finalvolume}=\frac{0.1X50}{(20+50)}= 0.0714M

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Putting values

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4 0
2 years ago
Analyze and solve this partially completed galvanic cell puzzle. There are 4 electrodes each identified by a letter of the alpha
klasskru [66]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The correct option is  E_{cell}__{AC}} = 0.94

Explanation:

  From the question we are told that

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From the data give we can see that

               E_{cell}__{AD}} - E_{cell}__{BD}} = E_{cell}__{AB}}

i.e           1.56 - 1.53 = 0.03

   In the same way we can say that

              E_{cell}__{AD}}-E_{cell}__{CD}} = E_{cell}__{AC}}

=>        E_{cell}__{AC}}=1.56- 0.62

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5 0
2 years ago
Calculate the freezing point of a 0.08500 m aqueous solution of nano3. the molal freezing-point-depression constant of water is
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where, K_{f} = cryoscopic constant = 1.86^{0} C/m,
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i = van't Hoff factor = 2 (For NaNO_{3})

Thus, (ΔT_{f}) = 1.86 X 0.0085 X 2 = 0.03162^{0}C

Now, (ΔT_{f}) = T^{0} - T
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8 0
2 years ago
Read 2 more answers
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We can predict the order of the elements given above according from the highest to lowest first ionization energies by using the trends in a periodic table. For elements in a family, the ionization energy decreases as it goes down. Therefore, the correct order would be Be, Mg, Ca, Sr.
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When a 1.00 L sample of water from the surface of the Dead Sea (which is more than 400 meters below sea level and much saltier t
Harlamova29_29 [7]

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Explanation:

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