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3 years ago

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Which elements are present in all organic compounds? 1. Hydrogen and oxygen 2. Nitrogen and Carbon 3. Nitrogen and oxygen 4. Hyd

rogen and Carbon

1 answer:

cupoosta [38]3 years ago

8 0

Answer:

my answer is num:3 Hydrogen and oxygen.

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The number of moles in 4.27×10^22 particles of silver is

bazaltina [42]

Answer:

$mol=0.0709mol$

Explanation:

Hello,

In this since one mole equals 6.022x10²³ particles of silver by means of the Avogadro's number, we can compute the moles in 4.27x10²² particles as shown below:

$mol=4.27x10^{22}particles*\frac{1mol}{6.022x10^{23}particles}\\\\mol=0.0709mol$

Best regards.

3 0

3 years ago

1.Which description is not a property of an acid?

wlad13 [49]

Answer:

1.slimy feel

2.corrosive

Explanation:

hey friend hope it's help you...

8 0

2 years ago

The picture represents the process that produces most of the energy used by living organisms on Earth. Which process is represen

forsale [732]

Wheres the pic i cant answer without the pic

6 0

3 years ago

Read 2 more answers

From his experiments ,j.j Thomson concludes what?

Vladimir [108]

Answer:

Thomson made the following conclusions: The cathode ray is composed of negatively-charged particles. The particles must exist as part of the atom, since the mass of each particle is only ∼ 20001start fraction, 1, divided by, 2000, end fraction the mass of a hydrogen atom.

Explanation:

7 0

3 years ago

Read 2 more answers

Use the Henderson-Hasselbalch equation and your knowledge of ionization to help you answer this question. Aspirin is a weak acid

Leya [2.2K]

Answer:

The protonated form is predominant when aspirin is absorbed more readily. The ratio of conjugate base to acid is 1 to 100.

Explanation:

Aspirin is more readily absorbed when it is protonated, that is when pH is lower than pKa (<em>more H⁺ available in the medium</em>). We can confirm this using Henderson-Hasselbalch equation for pH = 1.5:

$pH = pKa +log(\frac{conjugate base}{weak acid} )\\1.5=3.5 +log(\frac{conjugate base}{weak acid} )\\-2.0=log(\frac{conjugate base}{weak acid} )\\10^{-2.0} =\frac{conjugate base}{weak acid}\\\frac{conjugate base}{weak acid}=0.01=\frac{1}{100}$

When aspirin is absorbed more readily the ratio of conjugate base to acid is 1 to 100, being the acid the <em>predominant</em> form.

6 0

3 years ago