Hi yh sure i'll be ur frnd
myself Anna nice to meet ya
ur intro plz
- Symbol of the ion: Br⁻.
- Name of the ion: Bromide ion.
<h3>Explanation</h3>
Br is the symbol for the element bromine. It is found in new IUPAC group 17 of a modern periodic table. Bromine is a halogen.
To name a halogen anion with charge -1, replace the suffix "-ine" in the name of the element with the suffix "-ide." For example,
![\displaystyle \begin{array}{lcl} \text{Element}& & \text{Ion}\\ \text{Brom}\textbf{ine} &\to& \text{Brom}\textbf{ide}\text{ ion} \\\text{Chlor}\textbf{ine} &\to & \text{Chlor}\textbf{ide}\text{ ion}\\\text{Fluor}\textbf{ide}& \to & \text{Fluor}\textbf{ide}\text{ ion}\end{array}](https://tex.z-dn.net/?f=%5Cdisplaystyle%20%5Cbegin%7Barray%7D%7Blcl%7D%20%5Ctext%7BElement%7D%26%20%26%20%5Ctext%7BIon%7D%5C%5C%20%5Ctext%7BBrom%7D%5Ctextbf%7Bine%7D%20%26%5Cto%26%20%5Ctext%7BBrom%7D%5Ctextbf%7Bide%7D%5Ctext%7B%20ion%7D%20%5C%5C%5Ctext%7BChlor%7D%5Ctextbf%7Bine%7D%20%26%5Cto%20%26%20%5Ctext%7BChlor%7D%5Ctextbf%7Bide%7D%5Ctext%7B%20ion%7D%5C%5C%5Ctext%7BFluor%7D%5Ctextbf%7Bide%7D%26%20%5Cto%20%26%20%5Ctext%7BFluor%7D%5Ctextbf%7Bide%7D%5Ctext%7B%20ion%7D%5Cend%7Barray%7D)
The symbol of a bromine atom is Br. The atom is neutral. However, it carries a negative charge of -1 after it gains one electrons and forms a negative ion. The charge of the bromide ion shall be written as a superscript in its symbol. The size of the charge is written in front of the sign.
The charge on the bromide ion is -1. In the superscript, omit the number 1 and write "-". Hence the symbol
.
Answer:
23.4 torr
Explanation:
For solutions that contain non-volatile solutes, the vapor pressure of the solution can be determined by using the mole fraction of the solvent and the vapor pressure of the pure solvent at the same temperature.
P
sol
=
χ
solvent
⋅
P
∘
solvent
, where
P
sol
is the vapor pressure of the solution
χ
solvent
is the mole fraction of the solvent
P
∘
solvent
is the vapor pressure of the pure solvent
In your case, you know that the vapor pressure of pure water at
25
∘
C
is equal to
23.8
torr. This means that all you have to do is determine the mole fraction of water in the solution.
As you know, mole fraction is defined as the number of moles of a component of a solution divided by the total number of moles present in that solution.
Use glucose and water's respective molar masses to determine how many moles of each you have
18.0
g
⋅
1 mole glucose
180.0
g
=
0.100 moles glucose
and
95.0
g
⋅
1 mole water
18.015
g
=
5.273 moles water
The total number of moles present in the solution will be
n
total
=
n
glucose
+
n
water
n
total
=
0.100
+
5.273
=
5.373 moles
This means that the mole fraction of water will be
χ
water
=
5.273
moles
5.373
moles
=
0.9814
Finally, the vapor pressure of the solution will be
P
sol
=
0.9814
⋅
23.8 torr
=
23.4 torr
The answer is rounded to three sig figs.
The correct rate-determining step would be step 1 since it would have the slower reaction rate. It would be as follows:
<span>H2O2(aq) + I-(aq) --> H2O(l) + IO-(aq)
</span>
The slow step in a reaction mechanism would always be the rate-determining since it is at this rate everything follows through. Hope this helps.
Answer:
Because only a few bacterias can "fix" the atmosphere nitrogen.
Explanation:
The nitrogen at the atmosphere is in the form of N₂ and represents 78% of the atmosphere composition. The element is part of the constitution of nucleic acids and proteins, so the living beings needed them.
However, the animals and the plants can't catch the N₂. Some bacterias that live in mutualism with plants have this ability, and they "fix" the atmosphere nitrogen, transforming the N₂ in the ions nitrite (NO₃⁻) or ammonia (NH₃), which can be caught by the plants.
Them, when the primary consumers eat the plants they catch the nitrogen, which will be passed through the food chain.
So, it's difficult to pull nitrogen from the atmosphere into the nitrogen cycle of the biosphere because only a few bacterias can do it.