What is alloys? write the composition of bronze and brass

223.4 g of iron can be formed from 6 moles of hydrogen gas.

Explanation:

Fe₂O₃(s) + 3 H₂(g) → 2 Fe(s) + 3 H₂O(l)

Since the given equation is the balanced one, we need 3 moles of hydrogen gas to make 2 moles of iron, so the molar ratio is 3:2. So, from 6 moles of hydrogen gas, we can make few moles of iron as,

Molar mass of iron = 55.85 g

So amount of iron produced = 4 moles × 55.85 g/mol = 223.4 g of iron

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.

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Answer:

975.56×10²³ molecules

Explanation:

Given data:

Number of molecules of C₂H₆ = 4.88×10²⁵

Number of molecules of CO₂ produced  =  ?

Solution:

Chemical equation:

2C₂H₆  + 7O₂     →      4CO₂ + 6H₂O

Number of moles of C₂H₆:

1 mole = 6.022×10²³ molecules

4.88×10²⁵  molecules×1mol/6.022×10²³ molecules

0.81×10² mol

81 mol

Now we will compare the moles of C₂H₆ with CO₂.

                     C₂H₆          :             CO₂

                          2           :               4

                           81         :           4/2×81 = 162 mol

Number of molecules of CO₂:

1 mole = 6.022×10²³ molecules

162 mol ×6.022×10²³ molecules / 1 mol

975.56×10²³ molecules

Answer:odium

Explanation:

Final answer:

Among the metals Sodium, Rubidium, Aluminum, and Indium, Rubidium is the most reactive due to its position in the alkali metals group in the periodic table. The reactivity of metals increases as you go down in any group.

Explanation:

The question asked was: 'Out of Sodium, Rubidium, Aluminum, and Indium, which is the most reactive metal?' In the periodic table of elements, reactivity of metals increases as we move down in any group. Sodium and Rubidium are alkali metals present in Group 1. Out of these two elements, Rubidium is further down in the group and is thus more reactive compared to Sodium. However, Aluminum and Indium belong to different groups and are relatively less reactive when compared to alkali metals.

Passivation, or the formation of nonreactive film of oxide on metals such as Aluminum, makes them less reactive compared to alkali metals, which readily react with water and oxygen. In conclusion, among Sodium, Rubidium, Aluminum, and Indium, Rubidium is the most reactive metal.

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Answer:

3=8908-=698=49=304=+74950=405=0381=01=20

55555%

Explanation: