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3 years ago

Which statement explains why large atoms are more reactive than small atoms?

1 answer:

8 0

A. Large atoms have valence electrons farther from the nucleus and lose them more readily, so they are more reactive than small atoms.

For example, the valence electron of a small atom like Li is tightly held. Lithium gently fizzes on the surface as it reacts with the water to produce hydrogen.

In contrast, the valence electron of a large atom like Cs is so loosely held that cesium exlodes on contact with water.

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List these to smallest to largest nucleus, chromosomes, genes, DNA

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Answer: dna genes chromosomes nucleus

Explanation:

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3 years ago

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Please help

Vika [28.1K]

Answer:

1 atom of carbon on the reactant side (CH₄ is methane, 1 carbon, 4 hydrogen).

1 atom of carbon on product side (Law of Conservation of energy proves this).

4 hydrogen on reactant side (CH₄ is methane, 1 carbon, 4 hydrogen).

4 hydrogen on product side (Again, the Law of Conservation of energy proves this)

4 oxygen atom on the reactant side (2O₂ means two diatomic molecules, or two oxygen molecules of 2 atoms each).

4 oxygen atoms on the product side (Law of Conservation of energy).

2 molecules of oxygen on the reactant side.

2 molecules of water on the product side

Yes, the chemical equation is balanced. The amount of atoms is the constant on both the reactant and product side.

A Ionic bond is chemical bond between two oppositely charged ions because of the transfer of valence electrons between them.

A covalent bond is a chemical bond in which two or more atoms share electrons between them. They can also form polar covalent bond or non-polar covalent bonds (Although that depends on the electronegativities of the atom).

The bond of a carbon dioxide molecule is covalent bond (Polar covalent bond if you've learned that yet)

Potassium Fluoride (KFl) form an ionic bond.

2Al₂O₃ --> 4Al + 3O₂

A reducing agent loses electrons while and oxidizing agent gains electrons.

In an endothermic reaction, the total bond energy in the reactants is greater than the bond energy of products so energy is absorbed by the reaction. (For an endothermic reaction, more energy needs to be absorbed than released).

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3 years ago

When placed in a 100-mL square box, a substance has a spherical shape and has a volume of 50 mL. When placed in a 100-mL circula

Nady [450]

The given substance is SOLID. Solids have definite shape and definite volume. By the term definite we mean that wherever it may be placed both shape and volume remain the same. From the given above, the substance has a definite shape of sphere and definite volume of 50 mL.

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3 years ago

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GIVING BRAINLIEST FIVE STARS AND HEART!

iren [92.7K]

Explanation:

When an object is at rest, the body is said to possess potential energy. In another case, when the object is in motion, then it is said to possess kinetic energy. Potential energy tends to affect the object within the environment if and only when it gets transformed to other kinds of energy.

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3 years ago

Urea (CH4N2O) is a common fertilizer that can be synthesized by the reaction of ammonia (NH3) with carbon dioxide as follows: 2N

koban [17]

Answer:

NH₃ is the limiting reagent

Explanation:

Mass of ammonia = 132.0kg

Mass of carbon dioxide = 211.4kg

Mass of urea = 172.7kg

Unknown:

Limiting reagent = ?

Solution

First, we write the balanced stoichiometeric equation:

2NH₃ + CO₂ → CH₄N₂O + H₂O

The reactant that is present in short supply determines the amount of product that is formed in a reaction. This reactant is called the limiting reagent.

To establish the limiting reagent, we need to go find out what is happening at the start of the reaction:

Convert the masses of the reactants to moles.

Number of moles of NH₃ = $\frac{mass}{molar mass}$