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2 years ago

Which of the minerals/mineral groups provides the red coloring used by artists for thousands of years

1 answer:

7 0

Given what we know, we can confirm that mercury sulfide is the mineral that provides the red coloring used by artists for thousands of years.

<h3>What is mercury sulfide?</h3>

This is a compound that can be quite toxic. It has come to be known as Cinnabar. This mineral has a distinct property in which it will provide red coloring, which drew the attention of ancient artists that used it for art and decorations.

Therefore, we can confirm that the mineral known as Cinnabar, which is mercury sulfide, is the mineral that provides the red coloring used by artists for thousands of years.

To learn more about art visit:

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Give an example, other than making ice-cream or a slushy, where the effect of salt on the phase change of water is useful in eve

guapka [62]

Answer:

Putting salt on the ground to melt ice or snow I mean.

Explanation:

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4 years ago

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Metals have high melting and boiling points and are often shiny and silvery. Which of the blocks are metals?

DanielleElmas [232]

Answer:

S and p blocks elements are considered metals while d-block elements are considered transition metals.

Explanation:

s-block consist of lithium, sodium, potassium, rubidium, cesium and francium metals.

All are these called alkali metals.

These metals have one valance electron.

These metals are soft and having low density.

They easily lose their one valance electron and form cation with +1 charge.

They have low melting points.

P- block elements includes beryllium, magnesium, calcium, strontium, barium, radium metals.

They are called alkaline earth metals.

All are these have two valance electrons.

They easily lose their valance electrons and form cation with charge of +2.

These metals are also very soft.

They form salt with halogens.

They are also very reactive metals.

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3 years ago

Define the law of conservation of charge and provide an example.

iren2701 [21]

Answer:

Conservation of Charge is the principle that the total electric charge in an isolated system never changes. The net quantity of electric charge, the amount of positive charge minus the amount of negative charge in the universe, is always conserved.

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3 years ago

What is the mass of 2.70 ×10^22 molecules of NaOH (Molar mass = 40.0 g/mol)?

Viefleur [7K]

Data:
Molar Mass of NaOH = 40 g/mol

Solving: According to the Law Avogradro, we have in 1 mole of a substance, 6.02x10²³ atoms/mol or molecules

1 mol -------------------- 6.02*10²³ molecules
y mol -------------------- 2.70*10²² molecules

6.02*10²³y = 0.270*10²³
$y = \frac{0.270*\diagup\!\!\!\!\!\!10^{\diagup\!\!\!\!\!\!23}}{6.02*\diagup\!\!\!\!\!\!10^{\diagup\!\!\!\!\!\!23}}$
$\boxed{y \approx 0.04\:mol}$

Solving: Find the mass value now

40 g ----------------- 1 mol of NaOH
x g ------------- 0.04 mol of NaOH

$x = 40*0.04$
$\boxed{\boxed{x = 1.6\:g}}\end{array}}\qquad\quad\checkmark$

Answer:
The mass is 1.6 grams

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3 years ago

What is meant by collision theory?

Tcecarenko [31]

Answer:

The collision theory states that a chemical reaction can only occur between particles when they collide (hit each other).

hope it helps~

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3 years ago