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uysha [10]
4 years ago
6

Three places you could find alkaline earth compounds are

Chemistry
1 answer:
tatuchka [14]4 years ago
5 0

Answer:

1. Soil

2. Fresh water

3. Bones and teeth

Explanation:

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Why Aluminium Oxide has higher melting point than Alumunium Chloride? Try to mentioned about ionic compound.
Sidana [21]

Answer:

Aluminium oxide has higher melting point than aluminium chloride because there nay be some impurities in the oxide which affects the intermolecular force of attraction

4 0
4 years ago
Provide an explanation at the subatomic level to explain why different colors are observed for different metal salts.
lakkis [162]

Answer:

When you heat an atom, some of its electrons are "excited* to higher energy levels. When an electron drops from one level to a lower energy level, it emits a quantum of energy. ... The different mix of energy differences for each atom produces different colours. Each metal gives a characteristic flame emission spectrum.

Explanation:

8 0
4 years ago
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Which cell structure is the gatekeeper, controlling what goes in and out of the cell?
Katena32 [7]
The answer c) A- Cell membrane because it selects what molecules enter/exit the cell
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Is acetylene a homogeneous or heterogeneous mixture
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<span>Acetylene is a pure substance so it is homogeneous.</span>
8 0
4 years ago
A chemist measures the energy change Delta H during the following
Ann [662]

Answer: 1) endothernic

2) Yes absorbed

Explanation:

Decomposition is a chemical reaction in which one reactant gives two or more than two products. All decomposition reactions are endothermic reactions as energy is absorbed to break the bonds.

Endothermic reactions are defined as the reactions in which energy of the product is greater than the energy of the reactants. The total energy is absorbed in the form of heat and \Delta H for the reaction comes out to be positive.

Exothermic reactions are defined as the reactions in which energy of the product is lesser than the energy of the reactants. The total energy is released in the form of heat and \Delta H for the reaction comes out to be negative.

5 0
3 years ago
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