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3 years ago

How many atoms are in 5.62 moles of Mercury?

Chemistry

1 answer:

Maslowich3 years ago

4 0

Answer:

3.384364 time 10^24 atoms

Explanation:

multiply by avogadro's number

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After scientists discovered electrons and protons, what led them to believe there was a third subatomic particle? A. Elements ha

-BARSIC- [3]

C. The mass of an atom is greater than the combined masses of an atom's protons and electrons.
Existence of a neutron is predicted by Rutherford in 1920. So he explained difference between an atomic mass and an atomic number.

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3 years ago

Why are ionization energies evidence for the quantization of energy levels in atoms, as described by the Schrodinger wave mechan

UNO [17]

Ionization energies evidence for the quantization of energy levels in atoms, as described by the Schrodinger wave mechanical model of the atom because it takes a specific amount of energy to remove the definite one electron from an atom.

Explanation:

Ionization energies evidence for the quantization of energy levels in atoms, as described by the Schrodinger wave mechanical model of the atom because it takes a specific amount of energy to remove the definite one electron from an atom.
There is an approximate amount of energy which is needed to overcome the attractive force between the electrons and nucleus.
If you put less than the required ionization energy, then the electrons can not be removed.

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3 years ago

What is the molality of an aqueous KCl solution with a mole fraction of KCl, XKCl = 0.175? (The molar mass of KCl = 74.55 g/mol

NARA [144]

Answer:

The molality of the KCl solution is 11.8 molal

Explanation:

Step 1: Data given

Mol fracrion KCl = 0.175

Molar mass KCl = 74.55 g/mol

Molar mass H2O = 18.02 g/mol

Step 2: Calculate mol fraction H2O

mol fraction H2O = 1 - 0.175 = 0.825

Step 3: Calulate mass of H2O

Suppose the total moles = 1.0 mol

Mass H2O = moles H2O * molar mass

Mass H2O = 0.825 * 18.02 g/mol

Mass H2O = 14.87 grams = 0.01487 kg

Step 4: Calculate molality

Molality KCl = 0.175 / 0.01487 kg

Molality KCl = 11.8 molal

The molality of the KCl solution is 11.8 molal

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3 years ago

Scientists often _________________________ and _______________________ to help them interpret complex ideas. *

Ray Of Light [21]

Answer:

no sir

Explanation:

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3 years ago

It is true/falseit that when hydrogen cyanide, h c n , dissolves in water, the solution is weakly conducting and acidic in natur

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False is the correct answer.

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3 years ago