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3 years ago

True or False? You should change the subscripts to balance chemical equations.

Chemistry

1 answer:

Kitty [74]3 years ago

3 0

False subscripts cannot be changed to balance chemical equations

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Define crystaline polymer and amorphous polymer .Give two example of each polymer.

12345 [234]

Crystalline Polymer = a polymer in a solid structure which is ordered.

Amorphous Polymer = a polymer without a clearly defined shape/form

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3 years ago

The shape of an atomic orbital is associated with

Diano4ka-milaya [45]

The properties of the atomic orbital are actually dependent on the quantum numbers.

size of atomic orbital: governed by the principal quantum number (n)

shape of atomic orbital: governed by the angular momentum quantum number (l)

orientation in space: governed by the magnetic quantum number (ml)

Since we are asked about the shape, hence the correct answer is:

angular momentum quantum number (l)

8 0

3 years ago

If 765 mL of a gas at 2.78 atm, has the volume Change to 2.47 L , What is the pressure of the

vampirchik [111]

Answer:

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

$P_1V_1 = P_2V_2$

Since we are finding the new pressure

$P_2 = \frac{P_1V_1}{V_2} \\$

From the question

2.47 L = 2470 mL

We have

$P_2 = \frac{765 \times 2.78}{2470} = \frac{2142}{2470} \\ = 0.867206...$

We have the final answer as

Hope this helps you

3 0

3 years ago

Which one has more mass a bag of cotton balls or a bag of nails and explain

Mama L [17]

You would think that the bag of nails would have more mass but their masses are identical. <span>If you were to put them both in a vacuum chamber and let them fall from a great height, they would fall the same speed. The vacuum chamber would suck all of the air out of the cotton balls, thus making it heavier and weigh the same as the bag of nails.

Hopefully this is helpful and makes sense.</span>

6 0

3 years ago

Write the structure of a D-aldohexose that gives a meso compound on treatment with NaBH4 in water.

soldier1979 [14.2K]

Explanation:

Meso compounds are optically inactive stereoisomers. Despite of having chiral carbon, they do not show optical activity because it has a plane of symmetry in its structure itself. It is superposable on its mirror image.

Aldo sugars on reaction which reducing agents such as , NaBH₄ reduces the carbonyl group in the sugar to alcohol and gives corresponding alditol.

<u>The D- aldohexose which on reduction gives a meso alditol are allose and galactose. </u>

<u>The structure is shown in the image below. Thus, in allitol and galactitol formed have internal plane of symmetry which makes the optically inactive.</u>

7 0

3 years ago