How many toal atoms are in 3NaOH2
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If it is three moles of NaOH i.e 3 NaOH
The number of atoms in each mole = 3 moles atoms
so total moles of atom = 9 moles of atom
in each mole of atoms = 6.023 X 10^23 atoms
so total atoms in three moles of NaOH = 9 X 6.023 X 10^23 atoms
= 5.4207 X 10^24 atoms
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Indicate whether each of the following substances would be more soluble in H2O or C6H14:(a) KI(b) C8H18(c) grease(d) CH3(CH2)12OH(e) NaC2H3O2
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Final answer:
Atoms with low ionization energy form positive ions or cations more easily than atoms with high ionization energy due to less energy being required to remove an electron from the atom's valence shell.
Explanation:
The ease at which an atom forms a positive ion, also known as a cation, depends on its ionization energy. Ionization energy is the minimum amount of energy required to remove an electron from an atom in its ground state.
An atom with a low ionization energy will form a cation more readily than an atom with a high ionization energy. This is because it takes less energy to remove an electron from the atom's valence shell. On the other hand, atoms with a high ionization energy hold their electrons more tightly, thus it requires more energy to form a cation. This is seen in the trend across the periodic table where ionization energy increases across a period and decreases down a group due to the size and energy of the orbitals.
Sometimes, successive ionization energies or the energy necessary to remove subsequent electrons from an atom increase because core electrons, which are closer to the nucleus and thus experience a strong electrostatic attraction, are harder to remove than valence electrons.
Learn more about Ionization Energy here:
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B) The Mesozoic
C) The Paleozoic
D) The Precambrian
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Answer:
Mass = 7.2 g
Explanation:
Given data:
Mass of water produced = ?
Mass of oxygen = 7.8 g
Solution:
Chemical equation:
2H₂ + O₂ → 2H₂O
Number of moles of oxygen:
Number of moles = mass/ molar mass
Number of moles = 7.8 g/ 32 g/mol
Number of moles = 0.2 mol
Now we will compare the moles of water with oxygen.
O₂ : H₂O
1 : 2
0.2 : 2×0.2 = 0.4 mol
Mass of water:
Mass = number of moles × number of moles
Mass = 0.4 mol × 18 g/mol
Mass = 7.2 g
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Both are the unit of mass.
1 short ton = 2000 pounds
1 short ton = 907.18474 kg
Thus, 3.72 short ton =
= 3,374.727 kg
Now, convert kg to mg:
1 kg = 10,00,000 mg
Therefore,
3.72 short tons =
=
Hence, 3.72 short tons =