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faltersainse [42]
2 years ago
9

What is gesso? a. A technique used by many Renaissance artists b. A medium used as a surface preparation or primer for a paintin

g c. A mixture of egg yolk and pigment used to harden paint.
Chemistry
1 answer:
Sholpan [36]2 years ago
5 0

Gesso is a white paint blend that comprises pigment, chalk and gypsum. It is a medium utilised for surface preparation and as a primer for a painting.

<h3>What are the uses of gesso?</h3>

Gesso is widely utilized for preparing surfaces and as primers by painters. They were used by painters and artists earlier to make canvas, boards for painting purposes.

It was first formulated by chalk powder dust and pigment derived from the animal skin. They are widely used because of their adhering properties.

The use of the gesso makes the paint adhere to the canvas and the board surfaces and also, makes the surface textured.

Therefore, option b. it is used for preparing the surface is correct.

Learn more about gesso here:

brainly.com/question/1191408

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How many atoms are represented in 28 grand of sodium
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The molar mass of sodium is 22.99 ㅤ ㅤ ㅤ 22.99 (28) = 643.72 mol now multiply by avogrados number to find the number of atoms. ㅤ ㅤ ㅤ 643.72 (6.022 x 10^23) = 3.88 x 10^26 number of atoms
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Which one is it that it’s talking about?
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A physical change.......
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Grams of cl in 38g of cf3cl
Lerok [7]

Answer:

114 grams

Explanation:

3chlorines per compound*38grams=114

8 0
3 years ago
How is chemical bonding useful to our lives?
-BARSIC- [3]

Answer:

Three types of chemical bonds are important in human physiology, because they hold together substances that are used by the body for critical aspects of homeostasis, signaling, and energy production, to name just a few important processes. These are ionic bonds, covalent bonds, and hydrogen bonds.

Explanation:

3 0
3 years ago
(5 points)
ExtremeBDS [4]

<u>Answer 2 :</u> The given electronic configuration for a neutral atom of phosphorous in its ground state is incorrect.

Explanation :

A neutral atom of phosphorous has 15 electrons.

The given electronic configuration is incorrect.

The reason is, According to Aufbau principle, the electrons will be first filled in the sub-shell having lower orbital energy. As from the given configuration, 3p sub-shell has lower orbital energy than 4s sub-shell. So, the electrons will be filled in 3p sub-shell first. Hence, the ground state electronic configuration of neutral atom of phosphorous is,

1s^22s^22p^63s^23p^3

<u>Answer 3 :</u>

Element                     Rubidium              Magnesium                Aluminium

Symbol                             Rb                         Mg                              Al

Group number                  1                             2                               13

Number of valence          1                             2                                3

electrons

The order of general reactivity on the basis of number of valence electrons.

Rb > Mg > Al

Reason : The reactivity is determined by the number of electrons present in the outermost shell that means the element which have 1 valence electron will be more reactive because they can easily lose electrons.

5 0
3 years ago
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