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3 years ago

How did modern scientists experiment with Van Goghs paints to determine their chemical reactions?

Chemistry

1 answer:

Vlada [557]3 years ago

7 0

Answer:

the would test random expirements

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How many atoms are in KCI

vovikov84 [41]

<h3>Answer:</h3>

2 atoms

<h3>Explanation:</h3>

Compounds are substances that are formed when two or more elements chemically combine.
They are made up of molecules that contain different atoms from different elements.
For example, KCl is a compound that is made up of two atoms, one potassium atom and one chloride atom.

Unlike elements that are made of similar atoms, compounds contains atoms that are not similar from different elements.

3 0

3 years ago

An aqueous solution containing 10 g of an optically pure compound was diluted to 500 mL with water and was found to have a speci

lapo4ka [179]

Answer:

<u>Optical purity = 76.9231 %</u>

<u>Specific rotation of mixture = - 97.6923 °</u>

Explanation:

The mass of the racemic mixture = 3 g

It means it contains R enantiomer = 1.5 g

S enantiomer = 1.5 g

Amount of Pure R = 10 g

Total R = 11.5 g

Total volume = 500 mL + 500 mL = 1000 mL = 1 L

[R] = 11.5 g/L

[S] = 1.5 g/L

Enantiomeric excess = $\frac {Excess}{Total\ Concentration}\times 100$ = $\frac {11.5-1.5}{11.5+1.5}\times 100$ = 76.9231 %

<u>Optical purity = 76.9231 %</u>

Also,

Optical purity = $\frac {optical\ rotation\ of\ mixture}{optical\ rotation\ of\ pure\ enantiomer}\times 100$

Optical rotation of pure enantiomer = −127 °

$76.9231=\frac {optical\ rotation\ of\ mixture}{-127^0}\times 100$

<u>Specific rotation of mixture = - 97.6923 °</u>

6 0

3 years ago

What type of stress results when two plates push against one another?

Natasha2012 [34]

When two plates push against each other shear stress will happem because they move in opposite directions. In this case the force of the stress pushes some of the crust in different directions. When this happens, a large part of the crust can break off, which makes the plate size smaller.

3 0

3 years ago

Can u guys please answer this<br><br> What plasma looks like on the molecular level?

meriva

They look like gases plasmas have no fixed shapes or volume and are less dense tan solids or liquids

5 0

3 years ago

Read 2 more answers

Which of the following is not an example of a molecule?

9966 [12]

D. F

Molecules are a group of bonded atoms but Fluorine stands on its own

4 0

4 years ago

Read 2 more answers