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faltersainse [42]
3 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]3 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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avanturin [10]
The statement that best describes waves is B. Waves cannot propagate without a medium
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3 years ago
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Commercially available aqueous nitric acid has a density of 1.42 g/mL and a concentration of 16 M. Calculate the mass percent of
luda_lava [24]

Answer:

The mass % of HNO3 in the solution is 71.0 %

Explanation:

Step 1: Data given

Density of HNO3 = 1.42 g/mL

Concentration = 16 M = 16 mol /L

Molar mass HNO3 = 63.01 g/mol

Assume the volume = 1L or 1000 mL

Step 2: Calculate mass of the solution

Mass = density * volume

Mass = 1.42 g/mL * 1000 mL

Mass = 1420 grams

Step 3: Calculate moles HNO3

Moles = molarity * volume

Moles = 16 M * 1L

Moles = 16 moles

Step 4: Calculate mass HNO3

Mass HNO3 = moles * molar mass

Mass HNO3 = 16.0 moles * 63.01 g/mol

Mass HNO3 = 1008.16 grams

Step 5: Calculate the mass percent

mass % = (1008.16 grams / 1420 grams) *100%

mass % = 71.0 %

The mass % of HNO3 in the solution is 71.0 %

5 0
3 years ago
If a dog has a mass of 16.5 kg, what is its mass in the following units? Use scientific notation in all of your answers. (a) Wha
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Answer:

(a) 16500 grams

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8 0
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A group of scientists in Alaska notices that not only have atmospheric CO2 levels increased at their sampling site but so too ha
lutik1710 [3]

Answer:

The release of methane from thawed permafrost.

Explanation:

The complete question is

A group of scientists in Alaska notices that not only have atmospheric CO2 levels increased at their sampling site but so too have methane levels. What could account for this increase in methane levels?

- None of the answer options is correct.

- The release of methane from thawed permafrost.

-A decrease in beef production near the researchers' sampling area.

-The melting of permafrost accompanied by the thawing of methane-producing bacteria.

-The failure of rice paddies to be established in Alaska, given its climate.

Permafrost regions like the arctic circle hold a large supply supply of methane in their soils and their seas. Ordinarily, this methane should be gradually released naturally over a long period of time, but the effects of global warming is making these permafrost to thaw at a much faster rate, accelerating the release of methane into the atmosphere. The dark side is that methane is about 80 times more deadly when compared to CO2 in its contribution to the green house effect on earth.

5 0
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One of the following properties was originally used to arrange elements in the periodic table but is no longer used to organize
stira [4]

Answer:

atomic mass

Explanation:

4 0
4 years ago
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