CHEMISTRY HIGH SCHOOL

A mineral is a naturally occurring solid with a regular, repeating structure. true or false

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Answer 1

Answer:

Answer:

The answer is True

Explanation:

Answer 2

Answer:

Answer:

true!!!!!

Explanation:

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Which of these processes involves the splitting of an atom?nuclear fusionchemical reactionnuclear fissionphysical change

Answers

the process of splitting an atom into two nuclei is the nuclear fission

Which of the following is a correct definition of the term armature? A. A type of resistant wire B. A type of dry cell battery C. A circuit diagram D. A small lever in a relay switch

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option a. a type of resistant wire

a revolving structure in an electric motor or generator, wound with the coils that carry the current.

Answer:

The correct option is: D. A small lever in a relay switch

Explanation:

Armature is a constituting part of an electric machine, that can be used as a stationary or rotating part. It is a conductor or a conducting coil that carries alternating current and can generate electromotive force.

In a solenoid, the movable steel or iron part that functions as a switch or relay is also termed as the armature.

Why didn't scientists know about atoms for a long time

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they didnt have a powerfull enough microscope to see them an when they could they were moving to fast unless they were cold

A substance conducts an electric current when it is in the liquid state. What would the conductivity of the substance in solid form indicate about the type of bond in the substance?A.) If the solid is conductive, the bonds are ionic.
B.) If the solid is not conductive, the bonds are covalent.
C.) If the solid is conductive, the bonds are metallic.
D.) If the solid is not conductive, the bonds are metallic.

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Answer is: C.) If the solid is conductive, the bonds are metallic.

1) Substances with ionic bond conduct an electric current in liquid, but not in solid state, because in liquids ions are mobile, contrary to solids where ions are fixed.

2) Substances with covalent bond not conduct an electric current in liquid and solid state, because they not have free ions or electrons.

3) Substances with metallic bond conduct an electric current in liquid and solid state, because they have mobile electrons. Most metals have strong metallic bond, because strong electrostatic attractive force between valence electrons (metals usually have low ionization energy and lose electrons easy) and positively charged metal ions.

Answer:C.) If the solid is conductive, the bonds are metallic.

Explanation:

The chemical formula for aluminum hydroxide? is Al(OH)3. Which of the following is true about aluminum hydroxide?

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Where are the choices?

The amount of oxygen formed when 12.26 g of KClO3 is heated is ________.

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Answer:

approximately 4.8 grams of oxygen gas is formed.

Explanation:

To determine the amount of oxygen (O2) formed when 12.26 grams of potassium chlorate (KClO3) is heated, we need to consider the chemical reaction that occurs during this process. When KClO3 is heated, it decomposes into potassium chloride (KCl) and oxygen gas (O2).

The balanced chemical equation for this reaction is:

2 KClO3(s) → 2 KCl(s) + 3 O2(g)

From the equation, we can see that 2 moles of KClO3 produce 3 moles of O2.

Calculate the molar mass of KClO3:

K: 39.10 g/mol

Cl: 35.45 g/mol

O: 16.00 g/mol

Molar mass of KClO3 = (39.10 + 35.45 + 3 * 16.00) g/mol = 122.55 g/mol

Calculate the number of moles of KClO3 in 12.26 grams:

Moles of KClO3 = (12.26 g) / (122.55 g/mol) = 0.1 moles

Now, we can determine the number of moles of O2 produced using the mole ratio from the balanced equation:

Moles of O2 = (0.1 moles of KClO3) * (3 moles of O2 / 2 moles of KClO3) = 0.15 moles