How are chemicals used to produce colors in fireworks?

Answers

Answer 1

Answer:

Answer:

The colors are produced by heating metal salts, such as calcium chloride or sodium nitrate, that emit characteristic colors. List of colors and elements in Fireworks: Aluminum – Aluminum is used to produce silver and white flames and sparks.

Answer 2

Answer:

Final answer:

Colors in fireworks are produced by heating certain chemicals until they emit light, creating an emission spectrum. Different chemicals create different colors; for example, sodium compunds create yellow, while lithium creates crimson.

Explanation:

Chemicals are used to produce colors in fireworks by being heated until they are excited and emit light. This produces an emission spectrum which varies based on the element being heated. Sodium and its compounds, for example, produce a bright yellow color. This effect is seen when an electrical discharge is passed through sodium vapor. Lithium, on the other hand, creates a bright, crimson color.

Other alkali metals and their salts also add color to a flame. Even certain alkaline earth metals such as calcium, strontium, and barium give color to a flame giving shades of red and green. In certain specific engines, green and yellow flames are produced using different types of fuel and oxidant mixtures.

Thus, the specific chemicals used and how they're mixed and ignited play a critical role in the color of the resulting fireworks display.

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Is selenium tetrafluoride an ionic or covalent bond?

Answers

Final answer:

Selenium tetrafluoride (SeF4) is a molecule characterized by a covalent bond, not an ionic bond. This bond is formed by the sharing of electron pairs between selenium and fluorine atoms.

Explanation:

The question we have here asks, Is selenium tetrafluoride an ionic or covalent bond?

Selenium tetrafluoride, otherwise known as SeF4, is a molecule formed by the chemical bonding of selenium and fluorine. This bonding is not ionic in nature, but covalent. When you hear the term covalent bond, it refers to a bond formed by the sharing of electron pairs between atoms. Here, selenium and four fluorine atoms share their electrons, therefore creating a molecule of selenium tetrafluoride via a covalent bond.

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Final answer:

Selenium tetrafluoride (SeF4) is a covalent bond because it involves the sharing of electrons between two nonmetals, selenium and fluorine. This contrasts ionic bonds, which typically involve a metal donating electrons to a nonmetal.

Explanation:

Selenium tetrafluoride, identified by the chemical formula SeF4, is a type of covalent bond. This classification is due to the fact that selenium and fluorine are both nonmetals. In chemistry, when two nonmetals form a compound, they usually share electrons, resulting in a covalent bond. The electrons are shared because each atom wants to achieve a stable setup, often attained with a full outer shell. Therefore, these compounds are described as covalent or molecular. An example of an ionic bond, on the other hand, involves a metal and a nonmetal. In this type of bond, the metal will lose electrons to become a positively charged cation, while the nonmetal will gain these same electrons to become a negatively charged anion.

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What volume of carbon dioxide is produced when 0.489 mol of calcium carbonate reacts completely according to the following reaction at 0°C and 1 atm? calcium carbonate ( s ) calcium oxide ( s ) + carbon dioxide ( g )

Answers

Answer:

11.0L of carbon dioxide is produced

Explanation:

Balanced equation: $CaCO_(3)(s)\rightarrow CaO(s)+CO_(2)(g)$

According to balanced equation, 1 mol of $CaCO_(3)$ produces 1 mol of $CO_(2)$

So, 0.489 mol of $CaCO_(3)$ produces 0.489 mol of $CO_(2)$

Let's assume $CO_(2)$ behaves ideally.

So, $P_{CO_(2)}V_{CO_(2)}=n_{CO_(2)}RT$

where P is pressure, V is volume , n is number of moles, R is gas constant and T is temperature in kelvin

Plug-in all the values in the above equation-

$(1atm)* V_{CO_(2)}=(0.489mol)* (0.0821L.atm.mol^(-1).K^(-1))* (273K)$

or, $V_{CO_(2)}=11.0L$

So, 11.0L of carbon dioxide is produced

Greenhouse gases help regulate earths. A) oceans B) acid rain C) atmosphere D) temperature

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greenhouse gases help regulate earth by D. temperature

Greenhouse gases help regulate earths D. Temperature.

Which of the following mixture types is characterized by the settling of particles?a. solution
b. suspension
c. colloid
d. hydrate

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The answer is B. Suspension. Suspension mixtures are composed of two or more materials mixed together wherein the solute particles are usually larger than those found in a solution or colloid. In cases of solid-fluid suspension mixtures, the solid solute particles tend to settle at the bottom of the mixture after some time.

which element is the most electronegative out of the following K Mn Br WILL MARK BRAINLIEST!

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The correct answer is: [C]: "Br" {"bromine"} .
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Balance chemical equations
_Fe + _H₂SO₄ -> Fe₂ (SO₄)₃ _ H₂

Answers

2 Fe + 3 H₂SO₄ = 1 Fe₂(SO₄)₃ + 3 H₂

hope this helps!

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