Combustion is the reaction
Ionization energy is the energy required to lose an electron and form an ion. The stronger is the attraction of the atom and the electron the higher the ionization energy, and the weaker is the attraction of the atom and the electron the higher the ionization energy. This leads to a clear trend in the periodic table. Given that the larger the atom the weaker the attraction of the atom to the valence electrons, the easier they will be released, and the lower the ionization energy. This is, as you go downward in a group, the ionization energy decreases. So, the element at the top of the group will exhibit the largest ionization energy. <span>Therefore, the answer is that of the four elements of group 7A, fluorine will have the largest first ionization energy.</span>
Rapid population growth is never good. Typically this leads to higher demand for survival essentials such as food and living space in a species. The demands for food can drive prey extinct and backfire on the growing species. This can lead to mass death and possible extinction for a over populating species
Answer:
6.5
Step-by-step explanation:
We know we will need a balanced equation with masses and molar masses, so let’s gather all the information in one place.
M_r: 187.56 18.02
Cu(NO₃)₂·nH₂O ⟶ Cu(NO₃)₂ + nH₂O
m/g: 7.0 4.3
1. <em>Moles of Cu(NO₃)₂
</em>
Moles of Cu(NO₃)₂ = 4.3 g × (1 mol/187.56 g)
Moles of Cu(NO₃)₂ = 0.0229 mol
2. <em>Mass of H₂O
</em>
Mass of Cu(NO₃)₂·nH₂O = mass of Cu(NO₃)₂ + mass of H₂O
7.0 = 4.3 + x
7.0 - 4.3 = x
2.7 = x
3. <em>Moles of H₂O
</em>
Moles of H₂O = 2.7 g × (1 mol/18.02 g)
Moles of H₂O = 0.150 mol
4. <em>Value of n
</em>
The molar ratio is 1 mol (NO₃)₂ = n mol H₂O
n = moles H₂O/moles Cu(NO₃)2
n = 0.150/0.0229
n = 6.5
This answer does not make sense, because the maximum value of n in hydrated copper(II) nitrate is 6.
Answer:
I'm going to call the length of the bracelet the number of times you have to add to get back to the first bead. This is the same as the number of beads, except in one case:
The shortest bracelet has length 1 and starts with (0,0). If you add one time, you get back to the first 0. But the bracelet has two beads. (Every bracelet has to have at least two beads to start.) The next shortest bracelet starts with (0,5), and has length 3: 0 5 5.
There is a bracelet of length 4 that starts with (2,6) (the first example on the main page):
2 6 8 4
There is a bracelet of length 12 that starts with (1,3) (the second example on the main page):
1 3 4 7 1 8 9 7 6 3 9 2
There is a bracelet of length 20 that starts with (0,4)
0 4 4 8 2 0 2 2 4 6 0 6 6 2 8 0 8 8 6 4
There is a bracelet of length 60 that starts with (0,1)