Answer:
<h2>Translate your language to English </h2>
Answer:
There are 79 protons in the nucleus of one Gold atom.
Explanation:
The number of protons of any given atom/element can be determined by the atomic number of the specific element, which is found on the periodic table.
Answer:
Volume of ammonia produced = 398.7 dm³
Explanation:
Given data:
Volume of N₂ = 200 dm³
Pressure and temperature = standard
Volume of ammonia produced = ?
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Number of moles of N₂:
PV = nRT
1 atm× 200 L = n× 0.0821 atm.L/mol.K × 273 K
n = 200 atm.L /22.41 atm.L/mol
n = 8.9 mol
Now we will compare the moles of ammonia and nitrogen.
N₂ : NH₃
1 : 2
8.9 : 2/1×8.9 = 17.8 mol
Volume of ammonia:
1 mole of any gas occupy 22.4 dm³ volume
17.8 mol ×22.4 dm³/1 mol = 398.7 dm³
<span>An example of a homologous structure is the forelimb of a whale, a human, and a dog.
Homologous structures have the same structure, but may have a different function.
Homologous structures indicate a common ancestor.
A homologous structure is an organ or bone that's in common between different animals that demonstrates an anatomical commonality indicating that the animals share a common ancestor. This is in contrast to analogous structures where two unrelated animals have structures with similar forms or functions due to convergent evolution. With that in mind, let's look at the available options and see what fits.
An example of a homologous structure is the wing of a bird and an insect.
* This is an example of an analogous structure, so this is a bad choice.
An example of a homologous structure is the forelimb of a whale, a human, and a dog.
* Exactly. This is a good example of a homologous structure, so this is a good choice.
Homologous structures have the same function but a different structure.
* False. This is a type of analogous structure.
Homologous structures have the same structure, but may have a different function.
* True. A homologous structure is a structure that was present in a common ancestor of different animals. Further evolution may have caused those animals to diverge and the common structure may now be used for different purposes. So this is a good choice.
Homologous structures indicate a common ancestor.
* Yes, by definition.
Homologous structures do not indicate a common ancestor.
* Since the previous option was true, this must be false, so a bad choice.</span>
It will be nitrogen.
The energy associated with the formation of 1 mol of gaseous cations is The ionization energy. 1 mole of electrons will form 1 mole of gaseous atoms under standard conditions. The ionization energy decreases as you go down a group on the periodic table.
