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3 years ago

How long does Neptune take to rotate on its axis?

Chemistry

1 answer:

Ray Of Light [21]3 years ago

8 0

23.934 Hours Is how long it tales.

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Lori is saving money to buy a new bike. She needs $120 but has only saved 60%.

I am Lyosha [343]

10% of 120 is 12
12 x 6 is 72
The answer is 72

3 0

3 years ago

What is the atomic number of the atom in the diagram above

Studentka2010 [4]

Answer:

The atomic number is 5.

Explanation:

There are 5 protons in the nucleus, so the atomic number is 5. The atomic number always equals the number of protons in the nucleus.

4 0

3 years ago

Read 2 more answers

Assuming the following materials will not mix,show how the materials would "Stack up" in a graduated cylinder.

mihalych1998 [28]

<u>Answer:</u>

Density is mass per unit volume.

Its formula is

Density = Mass / Volume

Its units can be kg/L or kg/( $dm^3$ ) or g/mL or g/( $cm^3$ )

Density of various substances are given. The more denser substance goes to the bottom of the graduated cylinder.

Air on the top then comes Wood followed by Corn oil followed by Ice and then Water followed by Glycerin then Rubber then Corn syrup and at last Steel at the bottom which will more denser than all the substances mentioned above.

The staking up of the substances is in the order mentioned below in the tabular column

4 0

4 years ago

Which statement explains why a rubber band analogy is not a perfect comparison for bonds in a substance when considering phase c

Aliun [14]

The bonds in a substance breaks down in a phase change from liquid to gas and the molecules move independently of each other.

It is conventional to describe chemical bonds with the aid of elastic materials such as a rubber band. This analogy can only apply to covalent bonds between atoms in which the bonds between atoms are stretched.

However, in discussing the bonds in a substance when considering phase changes, this analogy breaks down because for a phase change from liquid to gas, the bonds break completely and particles can move independently of each other.

Learn more: brainly.com/question/6111443

5 0

3 years ago

Read 2 more answers

er solutions can be produced by mixing a weak acid with its conjugate base or by mixing a weak base with its conjugate acid. The

liubo4ka [24]

Answer:

You need to add 19,5 mmol of acetates

Explanation:

Using the Henderson-Hasselbalch equation:

pH = pKa + log₁₀ [base]/[acid]

For the buffer of acetates:

pH = pKa + log₁₀ [CH₃COO⁻]/[CH₃COOH]

As pH you want is 5,03, pka is 4,74 and milimoles of acetic acid are 10:

5,03 = 4,74 + log₁₀ [CH₃COO⁻]/[10]

1,95 = [CH₃COO⁻]/[10]

<em>[CH₃COO⁻] = 19,5 milimoles</em>

Thus, to produce an acetate buffer of 5,03 having 10 mmol of acetic acid, you need to add 19,5 mmol of acetates.

I hope it helps!

7 0

4 years ago