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3 years ago

Provide an explanation at the subatomic level to explain why different colors are observed for different metal salts.

Chemistry

2 answers:

lakkis [162]3 years ago

8 0

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:

Solnce55 [7]3 years ago

6 0

Answer:

Due to difference in the electronic energy level of atoms in different metals.

Explanation:

The subatomic particles are protons, electrons and neutrons.

When we talk about colors, the subatomic particle involved is electron.

An atom of a metal absorbs light and in this process the electrons gets exited (gain energy) and when they come back to ground state they emit light and thus the color appears.

In case of different metals the energy required for excitation of electrons is different (due to difference in the arrangement of electrons in the orbitals and difference in effective nuclear charge), thus the electrons in different metal atoms absorb light of different of wavelengths and end up in appearance of different colors.

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Write a net ionic equation that describes a slightly basic solution resulting from dissolving nac2h3o2 in water. Identify all of

Natali [406]

Answer: The net ionic equation will be as follows.

$CH_{3}COO^{-}(aq) + H_{2}O(l) \rightleftharpoons CH_{3}COOH(aq) + OH^{-}(aq)$

Explanation:

The chemical equation for the given reaction is as follows.

$CH_{3}COONa(aq) + H_{2}O(l) \rightleftarrow CH_{3}COOH(aq) + NaOH(aq)$

We know that a strong acid or base will dissociate completely into a solvent whereas a weak acid or base dissociates partially into the solvent. Hence, the ionic equation will be as follows.

$CH_{3}COO^{-}(aq) + Na^{+}(aq) H_{2}O(l) \rightleftharpoons CH_{3}COOH(aq) + Na^{+}(aq) + OH^{-}(aq)$ Now, we will cancel the spectator ions from the above equation. Therefore, the net ionic equation will be as follows.

$CH_{3}COO^{-}(aq) + H_{2}O(l) \rightleftharpoons CH_{3}COOH(aq) + OH^{-}(aq)$

or, $C_{2}H_{3}O^{-}_{2}(aq) + H_{2}O(l) \rightleftharpoons HC_{2}H_{3}O_{2}(aq) + OH^{-}(aq)$

4 0

3 years ago

What is the molarity of the solution resulting from the dissolution of 239 g glucose (C6H12O6) in 250

kifflom [539]

Answer:

Molarity =5.32 M

Explanation:

Given data:

Mass of glucose = 239 g

Volume = 250 mL (250 /1000 = 0.25 L)

Molarity = ?

Solution;

Formula:

Molarity = number of moles / volume in litter

Number of moles:

Number of moles = mass/ molar mass

Number of moles = 239 g / 180.2 g/mol

Number of moles = 1.33 mol

Molarity:

Molarity = number of moles / volume in litter

Molarity = 1.33 mol / 0.25 L

Molarity =5.32 M

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3 years ago

Where does ATP store its energy?

RSB [31]

Answer:

D. ATP stores energy in its "tail," which is made from three phosphate groups.

Explanation:

ATP = 3 phosphates

ADP= 2 phosphates

AMP= 1 phosphate

4 0

3 years ago

Drawing Conclusions

Dmitrij [34]

Answer:

The situation given here is imaginary such that the life of Rock has to be found using the half-life of the element lokium that has been found inside the rock.

Explanation:

Half-life of any material is the amount of time taken by that particular material to decay. Now the amount of lokium found in rock can show after how many half-lives this amount has been left out.

The time elapsed will be log (L) atoms X half-life.

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3 years ago

Give two examples of how our society uses isotopes

nalin [4]

Answer:

Isotopes – caused by varying numbers of neutrons in an element – have many practical uses in our society. ... In geology and archaeology, radioactive isotopes are used to determine the age of a sample while hydrologists can use isotope signatures to distinguish between different groundwater types.

Explanation:

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3 years ago