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3 years ago

A _____ is the condensed, visible form of chromatin.

Chemistry

2 answers:

KengaRu [80]3 years ago

5 0

I believe the answer is A chromosome

Anika [276]3 years ago

3 0

Chromosomes is the answer. A chromosome is a DNA molecule containing the genetic material of an organism. A chromatin is where the chromosomes of other organisms are composed, so this is correct.

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A volume of 129 mL of hydrogen is collected over water. The water level in the collecting vessel is the same as the outside leve

mixas84 [53]

Explanation:

As it is given that water level is same as outside which means that theoretically, P = 756.0 torr.

So, using ideal gas equation we will calculate the number of moles as follows.

PV = nRT

or, n = $\frac{PV}{RT}$

= $\frac{\frac{756}{760}atm \times 0.129 L}{0.0821 Latm/mol K \times 298 K}$

= 0.0052 mol

Also, No. of moles = $\frac{mass}{\text{molar mass}}$

0.0052 mol = $\frac{mass}{2 g/mol}$

mass = 0.0104 g

As some of the water over which the hydrogen gas has been collected is present in the form of water vapor. Therefore, at $25^{o}C$

$P_{\text{water vapor}}$ = 24 mm Hg

= $\frac{24}{760}$ atm

= 0.03158 atm

Now, P = $\frac{756}{760} - 0.03158$

= 0.963 atm

Hence, n = $\frac{0.963 atm \times 0.129 L}{0.0821 L atm/mol K \times 298 K}$

= 0.0056 mol

So, mass of $H_{2}$ = 0.0056 mol × 2

= 0.01013 g (actual yield)

Therefore, calculate the percentage yield as follows.

Percent yield = $\frac{\text{Actual yield}}{\text{Theoretical yield}} \times 100$

= $\frac{0.01013 g}{0.0104 g} \times 100$

= 97.49%

Thus, we can conclude that the percent yield of hydrogen for the given reaction is 97.49%.

3 0

3 years ago

What organ system carries oxygen and food aoround the body for respiration

kiruha [24]

mouth, pharynx, esophagus, stomach, liver, pancreas, small intestine, large intestine, nose, trachea, lungs, and the heart xd hope i helped

8 0

3 years ago

What is the pOH of a 5.6 x 10-5 M solution of cesium hydroxide (CsOH)?

Rudiy27

Answer: 4.25

Explanation: CsOH=Cs+

pOH= -log10

= -log10(5.6*10^-5)

= -log10(5.6*10^-5)=-(-4.25)

=4.25

7 0

3 years ago

The atomic number of nitrogen is 7. The mass is 14.01. This means that a) All nitrogen atoms have exactly 7 neutrons b) A small

adelina 88 [10]

This means that there are 7 protons in the nucleus of a nitrogen atom.

5 0

3 years ago

Read 2 more answers

Periodic Table Escape Enter the correct 4 digit code (no spaces) *

11111nata11111 [884]

Answer:

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Explanation:

6 0

3 years ago